# rollup changelog

## 1.13.1
*2019-06-01*

### Bug Fixes
* Avoid conflicts between top-level module, require etc. and CommonJS runtimes (#2889)

### Pull Requests
* [#2888](https://github.com/rollup/rollup/pull/2888): Enable full TypeScript strict mode (@lukastaegert)
* [#2889](https://github.com/rollup/rollup/pull/2889): Protect all module globals for CJS output from being redefined (@lukastaegert)

## 1.13.0
*2019-05-31*

### Features
* Omit `exports` and `module` from SystemJS wrapper if possible (#2880)
* Try to use the first letters of names when mangling exports (#2885)

### Bug Fixes
* Avoid conflicts with local variables when using format specific globals to render dynamic imports and file URLs (#2880)
* Do not produce undefined reexports when reexporting from entry points (#2885)

### Pull Requests
* [#2880](https://github.com/rollup/rollup/pull/2880): Deconflict global variables used inside format-specific code (@lukastaegert)
* [#2885](https://github.com/rollup/rollup/pull/2885): Do not produce undefined reexports when reexporting from entry points and refactor chunk linking (@lukastaegert)

## 1.12.5
*2019-05-30*

### Pull Requests
* [#2884](https://github.com/rollup/rollup/pull/2884): Update pluginutils for new micormatch and reduced bundle size (@lukastaegert)

## 1.12.4
*2019-05-27*

### Bug Fixes
* Show correct error stack trace for errors throw in "load" hooks (#2871)

### Pull Requests
* [#2875](https://github.com/rollup/rollup/pull/2875): Mention subfolders in docs (@lukastaegert)
* [#2871](https://github.com/rollup/rollup/pull/2871): Reserve error stack information (@LongTengDao)

## 1.12.3
*2019-05-19*

### Bug Fixes
* Prevent duplicate imports when exports are reexported as default exports (#2866)

### Pull Requests
* [#2755](https://github.com/rollup/rollup/pull/2755): Enable TypeScript strictNullChecks (@edsrzf)
* [#2866](https://github.com/rollup/rollup/pull/2866): Properly deduplicate reexported default exports (@lukastaegert)

## 1.12.2
*2019-05-17*

### Bug Fixes
* Do not fail when using clearScreen:false in watchMode (#2858)
* Properly resolve star reexports when preserving modules (#2860)

### Pull Requests
* [#2858](https://github.com/rollup/rollup/pull/2858): Declare processConfigsErr before use (@humphd)
* [#2860](https://github.com/rollup/rollup/pull/2860): Keep nested exports with preserveModules (@TomCaserta)
* [#2864](https://github.com/rollup/rollup/pull/2864): Cache transitive reexport detection (@lukastaegert)

## 1.12.1
*2019-05-16*

### Bug Fixes
* Extend file name sanitation to also replace "?" and "*" e.g. when preserving modules with the updated commonjs plugin (#2860)
* Do not ignore module transformer that return an empty string (#2861)

### Pull Requests
* [#2860](https://github.com/rollup/rollup/pull/2860): Update to latest plugins and extend file name sanitation (@lukastaegert)
* [#2861](https://github.com/rollup/rollup/pull/2861): Allow transformers to return an empty string (@lukastaegert)

## 1.12.0
*2019-05-15*

### Features
* Add `treeshake.moduleSideEffects` option to allow removing empty imports without a side-effect check (#2844)
* Extend plugin API to allow marking modules as side-effect-free (#2844)
* Extend `this.resolve` plugin context function with an option to skip the `resolveId` hook of the calling plugin (#2844)
* Add `isEntry` flag to `this.getModuleInfo` plugin context function (#2844)
* Distribute Rollup as optimized ES2015 code (#2851)

### Pull Requests
* [#2844](https://github.com/rollup/rollup/pull/2844): Add options and hooks to control module side effects (@lukastaegert)
* [#2851](https://github.com/rollup/rollup/pull/2851): Switch to ES2015 output (@lukastaegert)

## 1.11.3
*2019-05-05*

### Bug Fixes
* Quote es3 keywords in namespace objects (#2825)

### Pull Requests
* [#2825](https://github.com/rollup/rollup/pull/2825): Add es3 support for namespace object import (@sormy)

## 1.11.2
*2019-05-04*

### Bug Fixes
* Prevent a crash when handling circular namespace exports (#2836)

### Pull Requests
* [#2836](https://github.com/rollup/rollup/pull/2836): Make sure circular `export * from X` does not stack overflow (@Swatinem)

## 1.11.1
*2019-05-04*

### Bug Fixes
* Fix an issue where rendered exports were reported as "removed" in the bundle information (#2835)

### Pull Requests
* [#2835](https://github.com/rollup/rollup/pull/2835): Fix `removedExports` to correctly track the exported item (@Swatinem)

## 1.11.0
*2019-05-03*

### Features
* Add `emitChunk` plugin context function to emit additional entry chunks that can be referenced from the code (#2809)
* Allow `manualChunks` to be a function (#2831)
* Omit `.js` extensions in AMD imports to make sure an AMD `baseUrl` would work (#2809)
* Automatically use the name of the imported module as a base for dynamically imported chunks (#2809)
* Add `resolveFileUrl` plugin hook to replace `resolveAssetUrl` and handle emitted chunks as well (#2809)
* Add `resolve` plugin hook to replace `resolveId` and `isExternal` that returns an object (#2829)
* Allow `resolveDynamicImport` to return an `{id, external}` object to also resolve unresolvable dynamic imports to a module (#2829)

### Bug Fixes
* Do not create invalid code if a dynamic import contains nothing but reexports (#2809)
* Do not fail if modules that define a manual chunk depend on each other (#2809)
* Do not fail if a module that defines a manual chunk is the dependency of a module defining a different manual chunk (#2809)
* No longer fail for unnamed duplicate entry points but combine them (#2809)
* Always return `string | null` from `this.resolveId` even if some `resolveId` hooks return objects (#2829)
* Show proper warnings when `resolveDynamicImport` resolves to a non-external module that does not exist (#2829)

### Pull Requests
* [#2809](https://github.com/rollup/rollup/pull/2809): Add hook for dynamic entry chunk emission (@lukastaegert)
* [#2821](https://github.com/rollup/rollup/pull/2821): Fix syntax error in documentation (@FFxSquall)
* [#2829](https://github.com/rollup/rollup/pull/2829): Improve id resolution (@lukastaegert)
* [#2831](https://github.com/rollup/rollup/pull/2831): Allow manualChunks to be a function (@lukastaegert)
* [#2832](https://github.com/rollup/rollup/pull/2832): Improve `generateBundle` documentation (@lukastaegert)
* [#2833](https://github.com/rollup/rollup/pull/2833): Update dependencies (@lukastaegert)

## 1.10.1
*2019-04-19*

### Bug Fixes
* Invalid options.format values will now trigger a helpful error (#2813)

### Pull Requests
* [#2812](https://github.com/rollup/rollup/pull/2812): Minor documentation update (@dnalborczyk)
* [#2813](https://github.com/rollup/rollup/pull/2813): Catch invalid options.format values (@marijnh)
* [#2816](https://github.com/rollup/rollup/pull/2816): Update all dependencies to fix security issues (@lukastaegert)

## 1.10.0
*2019-04-11*

### Features
* Improve generated code to polyfill `import.meta.url` (#2785)
* Add plugin hook to configure handling of `import.meta` (#2785)
* Improve generated code when accessing URLs of emitted assets (#2796)
* Add plugin hook to configure the generated code when accessing URLs of emitted assets (#2796)

### Bug Fixes
* No longer resolve assets to their parent URL in some cases (#2796)

### Pull Requests
* [#2785](https://github.com/rollup/rollup/pull/2785): Refactor handling of import.meta.url and add option to configure behaviour (@lukastaegert)
* [#2796](https://github.com/rollup/rollup/pull/2796): Improve and fix asset emission (@lukastaegert)

## 1.9.3
*2019-04-10*

### Bug Fixes
* Simplify return expressions that are evaluated before the surrounding function is bound (#2803)

### Pull Requests
* [#2803](https://github.com/rollup/rollup/pull/2803): Handle out-of-order binding of identifiers to improve tree-shaking (@lukastaegert)

## 1.9.2
*2019-04-10*

### Bug Fixes
* Allowing replacing `output.file` with `output.dir` in the `outputOptions` hook (#2802)

### Pull Requests
* [#2802](https://github.com/rollup/rollup/pull/2802): Observe modified output options in bundle.write (@lukastaegert)

## 1.9.1
*2019-04-10*

### Bug Fixes
* Make sure inline comments in dynamic imports are preserved (#2797)

### Pull Requests
* [#2797](https://github.com/rollup/rollup/pull/2797): Emit inline comments inside dynamic import (@manucorporat)

## 1.9.0
*2019-04-05*

### Features
* Add built-in support for bigint (#2789)

### Pull Requests
* [#2789](https://github.com/rollup/rollup/pull/2789): Ship with bigint support built-in (@danielgindi)
* [#2791](https://github.com/rollup/rollup/pull/2791): Use shared extractAssignedNames from rollup-pluginutils (@lukastaegert)
* [#2792](https://github.com/rollup/rollup/pull/2792): Test that rollup-plugin-commonjs works with preserveModules (@lukastaegert)

## 1.8.0
*2019-04-02*

### Features
* Support `module` as alias for `esm` and `commonjs` for `cjs` to match Node (#2783)

### Pull Requests
* [#2782](https://github.com/rollup/rollup/pull/2782): Inline interopDefault in config loading (@guybedford)
* [#2783](https://github.com/rollup/rollup/pull/2783): Support Node-style format aliases (@guybedford)

## 1.7.4
*2019-03-28*

### Bug Fixes
* Improve TypeScript type of the treeshaking options (#2779)

### Pull Requests
* [#2779](https://github.com/rollup/rollup/pull/2779): Make all properties in TreeshakingOptions optional (@ndelangen)

## 1.7.3
*2019-03-24*

### Bug Fixes
* Use getters when re-exporting live-bindings (#2765)

### Pull Requests
* [#2765](https://github.com/rollup/rollup/pull/2765): Support exporting live-bindings from other chunks or external dependencies (@lukastaegert)

## 1.7.2
*2019-03-24*

### Bug Fixes
* Make sure relative external ids are resolved correctly (#2774)

### Pull Requests
* [#2774](https://github.com/rollup/rollup/pull/2774): Resolve relative external ids (@lukastaegert)

## 1.7.1
*2019-03-24*

### Bug Fixes
* Prevent invalid code when exporting several hundred identifiers from a chunk (#2768)
* Do not wrongly deconflict labels (#2776)

### Pull Requests
* [#2768](https://github.com/rollup/rollup/pull/2768): Sanitize shortened internal export names (@lukastaegert)
* [#2769](https://github.com/rollup/rollup/pull/2769): Update dependencies and fix security issue (@lukastaegert)
* [#2776](https://github.com/rollup/rollup/pull/2776): Do not treat break labels as identifiers (@lukastaegert)

## 1.7.0
*2019-03-20*

### Features
* Sort chunk exports by name for greater consistency (#2757)

### Bug Fixes
* Fix a situation where tree-shakeable code would not be removed in an indeterminate manner (#2757)

### Pull Requests
* [#2757](https://github.com/rollup/rollup/pull/2757): Sort modules before binding, sort exports (@lukastaegert)

## 1.6.1
*2019-03-20*

### Bug Fixes
* Avoid name clashes of unused default exports when tree-shaking is false (#2758)
* Do not crash when generating SystemJS bundles containing array patterns with member expressions (#2760)

### Pull Requests
* [#2758](https://github.com/rollup/rollup/pull/2758): Make sure unused default exports are deconflicted when tree-shaking is false (@lukastaegert)
* [#2760](https://github.com/rollup/rollup/pull/2760): Handle member expressions in array patterns (@lukastaegert)

## 1.6.0
*2019-03-08*

### Features
* Add plugin hook to modify output options (#2736)

### Pull Requests
* [#2736](https://github.com/rollup/rollup/pull/2736): Add hook for modifying OutputOptions (@Comandeer)

## 1.5.0
*2019-03-07*

### Features
* Allow resolving to a different id while marking it as external at the same time (#2734)

### Pull Requests
* [#2734](https://github.com/rollup/rollup/pull/2734): Allow resolveId to return an object (@lukastaegert)

## 1.4.2
*2019-03-07*

### Bug Fixes
* Respect variable identity of exports when hashing (#2741)
* Resolve a situations where a variable was imported twice with the same name (#2737)

### Pull Requests
* [#2741](https://github.com/rollup/rollup/pull/2741): Fix hashing when different variable are exported using the same name (@lukastaegert)
* [#2737](https://github.com/rollup/rollup/pull/2737): Fix duplicate imports with conflicting names (@lukastaegert)

## 1.4.1
*2019-03-04*

### Bug Fixes
* Do not treat the import target "" as external by default (#2733)

### Pull Requests
* [#2733](https://github.com/rollup/rollup/pull/2733): Do not treat the import target "" as external by default (@LongTengDao)

## 1.4.0
*2019-03-01*

### Features
* Add option to change the name of the dynamic import function to allow polyfilling it (#2723)

### Pull Requests
* [#2723](https://github.com/rollup/rollup/pull/2723): Add dynamicImportFunction option (@keithamus)

## 1.3.3
*2019-03-01*

### Bug Fixes
* Fix performance regression when handling long chains of calls to property methods (#2732)

### Pull Requests
* [#2730](https://github.com/rollup/rollup/pull/2730): Order types, interfaces, classes, and object members (@lukastaegert)
* [#2732](https://github.com/rollup/rollup/pull/2732): Take chunk export mode into account when reexporting default (@lukastaegert)

## 1.3.2
*2019-02-27*

### Bug Fixes
* Allow ids of default exported classes to be exported separately (#2728)

### Pull Requests
* [#2728](https://github.com/rollup/rollup/pull/2728): Update dependencies (@lukastaegert)

## 1.3.1
*2019-02-27*

### Bug Fixes
* Correctly reexport the default export from entry chunks (#2727)

### Pull Requests
* [#2727](https://github.com/rollup/rollup/pull/2727): Take chunk export mode into account when reexporting default (@lukastaegert)

## 1.3.0
*2019-02-26*

### Features
* Treeshake call expressions prefixed with UglifyJS style `@__PURE__` annotations (#2429)

### Pull Requests
* [#2429](https://github.com/rollup/rollup/pull/2429): Add support for /*#__PURE__*/ comments (@conartist6 and @lukastaegert)

## 1.2.5
*2019-02-26*

### Bug Fixes
* Store external ids reported by plugins in watch mode (#2718)

### Pull Requests
* [#2718](https://github.com/rollup/rollup/pull/2718): Incremental external (@andreas-karlsson)

## 1.2.4
*2019-02-26*

### Bug Fixes
* Fix an issue where a variable was imported twice under the same name (#2715)

### Pull Requests
* [#2715](https://github.com/rollup/rollup/pull/2715): Deduplicate imports referencing default exports and their original variables (@lukastaegert)

## 1.2.3
*2019-02-23*

### Bug Fixes
* Use correct path when rendering dynamic imports where the entry module is empty (#2714)

### Pull Requests
* [#2714](https://github.com/rollup/rollup/pull/2714): Properly render dynamic imports when imported module is empty (@lukastaegert)

## 1.2.2
*2019-02-19*

### Bug Fixes
* Fix wrong external imports when using the `paths` options only for some outputs (#2706)

### Pull Requests
* [#2706](https://github.com/rollup/rollup/pull/2706): Always recreate paths for external modules (@lukastaegert)

## 1.2.1
*2019-02-17*

### Bug Fixes
* Fix ESM version of Rollup (#2705)

### Pull Requests
* [#2705](https://github.com/rollup/rollup/pull/2705): Fix ESM version of Rollup (@lukastaegert)

## 1.2.0
*2019-02-17*

### Features
* Fewer renamed variables due to a completely reimplemented deconflicting logic (#2689)

### Bug Fixes
* Respect rendered and tree-shaken exports when determining chunk hashes (#2695)
* Fix an error when dynamic imports end up in the same chunk as one of their importees (#2677)
* Do not generate invalid code when expressions containing IIFEs are simplified (#2696)
* Do not throw an error when more than ten bundles are watched (#2700)
* Treat re-exported globals in a spec-compliant way (#2691)
* Fix issues related to wrongly renamed variables (#2689)
* Do not throw an error if config files contain non-default exports (#2673)
* Improve type of `RollupOutput.output` to guarantee at least one chunk (#2679)

### Pull Requests
* [#2673](https://github.com/rollup/rollup/pull/2673): Allow config files to have non-default exports (@swansontec)
* [#2677](https://github.com/rollup/rollup/pull/2677): Prevent final resolution and facade creation for inlined dynamic imports (@Rich-Harris and @lukastaegert)
* [#2679](https://github.com/rollup/rollup/pull/2679): Improve type of `RollupOutput.output` (@MattiasBuelens)
* [#2689](https://github.com/rollup/rollup/pull/2689): Reimplement variable deconflicting logic (@lukastaegert)
* [#2691](https://github.com/rollup/rollup/pull/2691): Fix CI issues and update acorn dependency (@lukastaegert)
* [#2693](https://github.com/rollup/rollup/pull/2693): Fix typo in export-globals test (@MattiasBuelens)
* [#2695](https://github.com/rollup/rollup/pull/2695): Respect rendered exports when generating chunk hashes (@lukastaegert)
* [#2696](https://github.com/rollup/rollup/pull/2696): Correctly render function expression inside simplified expression statements (@lukastaegert)
* [#2700](https://github.com/rollup/rollup/pull/2700): Add a fix for MaxListenersExceededWarning (@luwes)
* [#2703](https://github.com/rollup/rollup/pull/2703): Update rollup-pluginutils (@lukastaegert)

## 1.1.2
*2019-01-21*

### Bug Fixes
* Tree-shaken dynamic imports no longer leave behind `undefined` entries in the bundle information (#2663)
* Dynamic imports in dynamically imported files could lead to crashes and would not always create new chunks (#2664)

### Pull Requests
* [#2663](https://github.com/rollup/rollup/pull/2663): Do not include tree-shaken dynamic imports in bundle information (@lukastaegert)
* [#2664](https://github.com/rollup/rollup/pull/2664): Properly handle dynamic imports declared in dynamically imported files (@everdimension)

## 1.1.1
*2019-01-19*

### Bug Fixes
* Make sure object prototype methods are not considered to be falsy when tree-shaking (#2652)

### Pull Requests
* [#2652](https://github.com/rollup/rollup/pull/2652): Make sure object prototype methods are not considered to be falsy (@lukastaegert)
* [#2654](https://github.com/rollup/rollup/pull/2654): Use correct signature for `this.setAssetSource` in docs (@everdimension)
* [#2656](https://github.com/rollup/rollup/pull/2656): Swap descriptions for `[extname]` and `[ext]` in docs (@tivac)

## 1.1.0
*2019-01-09*

### Features
* Make `this.meta` available from the `options` plugin hook (#2642)
* Add a new `writeBundle` plugin hook that is called *after* all files have been written (#2643)

### Bug Fixes
* Make sure the `acorn` import of the bundled non-ESM acorn plugins is correctly translated to ESM (#2636)
* Make sure input options are actually passed to the `buildStart` hook (#2642)

### Pull Requests
* [#2636](https://github.com/rollup/rollup/pull/2636): Improve how acorn is imported, update dependencies (@lukastaegert)
* [#2642](https://github.com/rollup/rollup/pull/2642): Make this.meta available in options hook, pass input options to buildStart (@lukastaegert)
* [#2643](https://github.com/rollup/rollup/pull/2643): Implement writeBundle hook (@lukastaegert)

## 1.0.2
*2019-01-05*

### Bug Fixes
* Make sure the transform hook is always reevaluated when a file watched by the hook changes (#2633)
* Fix a crash when generating hashes for tree-shaken dynamic imports (#2638)
* Fix a crash and some inconsistencies when using the acorn-bigint plugin (#2640)

### Pull Requests
* [#2633](https://github.com/rollup/rollup/pull/2633): Document `this.addWatchFile` and make sure it also declares transform dependencies (@lukastaegert)
* [#2635](https://github.com/rollup/rollup/pull/2635): Make sure `code` is optional in warning type (@lukastaegert)
* [#2638](https://github.com/rollup/rollup/pull/2638): Do not fail when generating hashes for tree-shaken dynamic imports (@lukastaegert)
* [#2640](https://github.com/rollup/rollup/pull/2640): Always treat bigints as unknown (@lukastaegert)
* [#2641](https://github.com/rollup/rollup/pull/2641): Make sure all CLI options are listed in the summary (@lukastaegert)

## 1.0.1
*2019-01-03*

### Bug Fixes
* Properly handle reexporting an external default export for non-ESM targets when using named exports mode (#2620)
* Do not (wrongly) re-declare input options in the merged `RollupOptions` type (#2622)

### Pull Requests
* [#2620](https://github.com/rollup/rollup/pull/2620): Fixed issue with reexporting default as default with `{exports: named, interop: true}` options (@Andarist)
* [#2622](https://github.com/rollup/rollup/pull/2622): Simplify RollupOptions (@Kinrany)
* [#2627](https://github.com/rollup/rollup/pull/2627): Show how to skip imports for optional plugins (@chris-morgan)

## 1.0.0
*2018-12-28*

### Breaking Changes
* Several (mostly deprecated) options have been removed or renamed (#2293, #2409):
  - banner -> output.banner
  - dest -> output.file
  - entry -> input
  - experimentalCodeSplitting -> now always active
  - experimentalDynamicImport -> now always active
  - experimentalPreserveModules -> preserveModules
  - exports -> output.exports
  - extend -> output.extend
  - footer -> output.footer
  - format -> output.format
  - freeze -> output.freeze
  - globals -> output.globals
  - indent -> output.indent
  - interop -> output.interop
  - intro -> output.intro 
  - load -> use plugin API
  - moduleName -> output.name
  - name -> output.name
  - noConflict -> output.noConflict
  - output.moduleId -> output.amd.id
  - outro -> output.outro
  - paths -> output.paths
  - preferConst -> output.preferConst
  - pureExternalModules -> treeshake.pureExternalModules
  - resolveExternal -> use plugin API
  - resolveId -> use plugin API
  - sourcemap -> output.sourcemap
  - sourceMap -> output.sourcemap
  - sourceMapFile -> output.sourcemapFile
  - strict -> output.strict
  - targets -> use output as an array
  - transform -> use plugin API
  - useStrict -> output.strict
* In general, output options can no longer be used as input options (#2409)
* `bundle.generate` and `bundle.write` now return a new format (#2293)
* Several plugin hooks have become deprecated and will display warnings when used (#2409):
  - transformBundle
  - transformChunk
  - ongenerate
  - onwrite
* Plugin transform dependencies are deprecated in favour of using the `this.addWatchFile` plugin context function (#2409)
* Accessing `this.watcher` in plugin hooks is deprecated in favour of the `watchChange` plugin hook and the `this.addWatchFile` plugin context function (#2409)
* Using dynamic import statements will by default create a new chunk unless `inlineDynamicImports` is used (#2293)
* Rollup now uses acorn@6 which means that acorn plugins must be compatible with this version; acorn is now external for non-browser builds to make plugins work (#2293)

### Features
* The `--dir` ClI option can now be aliased as `-d` (#2293)
* The `--input` option now supports named entry points via `=` (#2293)

### Bug Fixes
* Both the `--input` option as well as the default CLI option now support named inputs (#2293)

### Pull Requests
* [#2293](https://github.com/rollup/rollup/pull/2293): Unify code paths for 1.0 relase and update documentation (@guybedford and @lukastaegert)
* [#2409](https://github.com/rollup/rollup/pull/2409): Remove old deprecated features and add new deprecation warnings (@guybedford)
* [#2486](https://github.com/rollup/rollup/pull/2486): Upgrade to acorn 6 (@marijnh)
* [#2611](https://github.com/rollup/rollup/pull/2611): Fix hook's name in test description (@Andarist)
* [#2612](https://github.com/rollup/rollup/pull/2612): Fix a self-contradicting comment in the docs (@LongTengDao)

## 0.68.2
*2018-12-23*

### Bug Fixes
* Do not assume hoisted variables to have been initialized (#2607)

### Pull Requests
* [#2607](https://github.com/rollup/rollup/pull/2607): Fix an issues where hoisted variables were assumed to have been initialized (@lye)

## 0.68.1
*2018-12-19*

### Bug Fixes
* Fix an issue with UMD wrappers where a variable is used without being defined (#2600)

### Pull Requests
* [#2600](https://github.com/rollup/rollup/pull/2600): Fix UMD and IIFE wrapper issues and add comprehensive functional wrapper tests (@lukastaegert)

## 0.68.0
*2018-12-16*

### Breaking Changes
* `optimizeChunks` is renamed to `experimentalOptimizeChunks` to reflect this feature is not production-ready yet (#2575)

### Features
* Plugins can iterate all module ids via `this.moduleIds` (#2565)
* Plugins can get graph information about a module via `this.getModuleInfo(id)` (#2565)
* Plugins and JS API users get more information about the generated chunks: `dynamicImports`, `facadeModuleId`, `isDynamicEntry`, `name` (#2575)
* Tree-shaken dynamic imports will no longer create chunks or influence chunking in any way (#2575)
* Dynamic imports will no longer follow the `entryFileNames` but the `chunkFileNames` property reflecting those are solely internally used (#2575)
* If there are chunk naming conflicts, entry chunks will always take precedence (#2575)
* If an entry facade is created, only the facade chunk is marked as `isEntry` (#2575)
* Dynamic chunks will only be marked as `isEntry` if they are actually entry chunks as well; thus there is now a 1-to-1 correspondence between modules listed in `input` and chunks marked as `isEntry` (#2575)
* Chunks no longer contain imports for variables that are tree-shaken in the chunk but used in other chunks (#2584)
* Chunks will always import re-exported variables directly from the chunk where they are originally exported from (#2584)
* Null characters will be pruned from chunk ids to allow for virtually created chunks and make `rollup-plugin-multi-entry` compatible with code-splitting and thus the upcoming 1.0 version (#2590)
* Simplify the UMD wrapper code as much as possible, especially if there are no exports (#2594)
* The UMD wrapper will now work in strict mode by checking for `self` before `this` when determining the global variable (#2594)

### Bug Fixes
* If a facade is created for a dynamic entry point, this facade will be imported instead of the facaded chunk (#2575)
* Manual chunks that include multiple entry points will have proper facades created for all entry points if necessary  (#2575)
* If missing exports are shimmed, the shim variable will not be global but created on a per-module basis and is deconflicted with variables having the same name (#2584)
* Missing export shims work properly in SystemJS (#2584)
* `preserveModules` now handles dynamic namespace imports (#2584)
* Fix chunk execution order in certain scenarios (#2584)
* Exports and assignments using destructuring syntax will properly update the exported variables when generating SystemJS output (#2587)
* Hashes in chunk names will now also take dynamic imports into account (#2596)

### Pull Requests
* [#2565](https://github.com/rollup/rollup/pull/2565): Provide module graph information on the plugin context (@samccone)
* [#2575](https://github.com/rollup/rollup/pull/2575): Extend bundle information, tree-shake dynamic imports, fix dynamic import facade creation, support manual chunks with multiple entry points, make `optimizeChunks` experimental (@lukastaegert)
* [#2577](https://github.com/rollup/rollup/pull/2577): Update dependencies (@lukastaegert)
* [#2584](https://github.com/rollup/rollup/pull/2584): Prune tree-shaken chunk imports, fix missing export shimming, support dynamic namespaces when preserving modules, improve chunk execution order (@lukastaegert)
* [#2587](https://github.com/rollup/rollup/pull/2587): Support exports using destructuring declarations and assignments in SystemJS (@lukastaegert)
* [#2590](https://github.com/rollup/rollup/pull/2590): Make sure chunk ids do not contain invalid characters to allow for chunks to correspond to virtual modules (@lukastaegert)
* [#2594](https://github.com/rollup/rollup/pull/2594): Simplify UMD wrapper code and make sure it works in strict mode (@lukastaegert)
* [#2596](https://github.com/rollup/rollup/pull/2596): Take both static and dynamic dependencies into account when calculating hashes (@lukastaegert)

## 0.67.4
*2018-12-03*

### Bug Fixes
* Prevent corrupt source maps for files with very long lines (#2571)

### Pull Requests
* [#2571](https://github.com/rollup/rollup/pull/2571): Fix an issue with long lines in sourcemaps (@mislav)

## 0.67.3
*2018-11-17*

### Bug Fixes
* Make sure the ESM browser build is actually published to npm (#2560)
* Throw proper error when using `inlineDynamicImports` with `experimentalPreserveModules` (#2560)

### Pull Requests
* [#2552](https://github.com/rollup/rollup/pull/2552): Properly include ESM browser build in package (@lukastaegert)
* [#2560](https://github.com/rollup/rollup/pull/2560): Show proper error when using `inlineDynamicImports` with `experimentalPreserveModules` (@clarkdo)

## 0.67.2
*2018-11-17*

### Bug Fixes
*  Prevent crash when not returning sourcemaps from `renderChunk` plugin hook (#2558)

### Pull Requests
* [#2558](https://github.com/rollup/rollup/pull/2558): Prevent crash when not returning sourcemaps from `renderChunk` (@kyle1320)

## 0.67.1
*2018-11-11*

### Bug Fixes
* Deconflict CLI entry points with same name but on different paths if no explicit naming is used (#2548)

### Pull Requests
* [#2548](https://github.com/rollup/rollup/pull/2548): Deconflict CLI entry points with same name but on different paths if no explicit naming is used (@lukastaegert)

## 0.67.0
*2018-11-04*

### Breaking Changes
none

### Features
* Do not resolve external dynamic imports via plugins to match the logic for static external imports again (#2505)
* Support virtual modules created by plugins when preserving modules (#2511)
* Add new `output.sourcemapExcludeSources` option to exclude the actual sources from sourcemaps (#2531)

### Bug Fixes
* Fix TypeScript type for sourcemaps (#2507)
* Fix order of external and inter-chunk imports to match the proper execution order (#2508) 
* Do not tree-shake children of unknown nodes to e.g. properly handle do-expressions via acorn plugin (#2510) 
* Prevent memory leak when using the bundle as cache (#2522) 
* Fix mis-placed semicolons for certain SystemJS exports (#2529)

### Pull Requests
* [#2505](https://github.com/rollup/rollup/pull/2505): Do not resolve external dynamic imports via plugins (@lukastaegert)
* [#2507](https://github.com/rollup/rollup/pull/2507): Fix public sourcemap type (@aMarCruz)
* [#2508](https://github.com/rollup/rollup/pull/2508): Improve execution order of chunks and externals (@lukastaegert)
* [#2510](https://github.com/rollup/rollup/pull/2510): Do not tree-shake children of unknown nodes to e.g. properly handle do-expressions via acorn plugin (@devsnek)
* [#2511](https://github.com/rollup/rollup/pull/2511): Create chunks for virtual modules when preserving modules (@lukastaegert)
* [#2522](https://github.com/rollup/rollup/pull/2522): Prevent memory leak when using the bundle as cache (@kyle1320)
* [#2529](https://github.com/rollup/rollup/pull/2529): Fix mis-placed semicolons for certain SystemJS exports (@kyle1320)
* [#2531](https://github.com/rollup/rollup/pull/2531): add `sourcemapExcludeSources` option to exclude the source content from sourcemaps (@kitsonk)

## 0.66.6
*2018-10-10*
* Properly deconflict function and class declaration ids of reassigned default exports ([#2502](https://github.com/rollup/rollup/pull/2502))

## 0.66.5
*2018-10-09*
* Remove cache from memory once no longer needed ([#2496](https://github.com/rollup/rollup/pull/2496))
* Provide better error message when reexporting external namespace reexports ([#2499](https://github.com/rollup/rollup/pull/2499))

## 0.66.4
*2018-10-04*
* Fix links in warnings and errors ([#2471](https://github.com/rollup/rollup/pull/2471))

## 0.66.3
*2018-10-03*
* Detect side-effects in string.replace function arguments ([#2476](https://github.com/rollup/rollup/pull/2476))
* Make sure chunk ids are assigned before creating output bundle ([#2483](https://github.com/rollup/rollup/pull/2483))
* Use proper plugin name in error ([#2470](https://github.com/rollup/rollup/pull/2470))
* Update TypeScript version and fix type errors ([#2488](https://github.com/rollup/rollup/pull/2488))

## 0.66.2
*2018-09-21*
* Add additional information to parse errors messages in JSON and other non-JS files ([#2466](https://github.com/rollup/rollup/pull/2466))

## 0.66.1
*2018-09-19*
* Ignore falsy plugins ([#2464](https://github.com/rollup/rollup/pull/2464))
* Switch back to official TypeScript plugin ([#2465](https://github.com/rollup/rollup/pull/2465))

## 0.66.0
*2018-09-16*
* Support ES2019 optional catch bindings ([#2455](https://github.com/rollup/rollup/pull/2455))
* Add option to transform paths within sourcemaps ([#2430](https://github.com/rollup/rollup/pull/2430))
* Add renderStart and renderEnd plugin hooks ([#2438](https://github.com/rollup/rollup/pull/2438))
* Expose ESM browser build and minify browser builds ([#2437](https://github.com/rollup/rollup/pull/2437)
* Associate hoisted variables in function bodys with function parameters ([#2456](https://github.com/rollup/rollup/pull/2456))
* Fix issue when deconflicting variables used as pattern defaults ([#2446](https://github.com/rollup/rollup/pull/2446))
* Properly deconflict default exported class and function expressions with ids ([#2458](https://github.com/rollup/rollup/pull/2458))
* Faster internal test builds ([#2457](https://github.com/rollup/rollup/pull/2457))
* Switch to rollup-plugin-typescript2 ([#2460](https://github.com/rollup/rollup/pull/2460))
* Fix internal "perf" script ([#2433](https://github.com/rollup/rollup/pull/2433))
* Test that errors are passed to the buildEnd hook ([#2450](https://github.com/rollup/rollup/pull/2450))

## 0.65.2
*2018-09-05*
* Prevent watch mode memory leak ([#2441](https://github.com/rollup/rollup/pull/2441))

## 0.65.1
*2018-09-05*
* Prevent globbing when using chokidar ([#2432](https://github.com/rollup/rollup/pull/2432))

## 0.65.0
*2018-08-25*
* Refactor and unify plugin system ([#2382](https://github.com/rollup/rollup/pull/2382))
* Implement plugin cache API ([#2389](https://github.com/rollup/rollup/pull/2389))
* Add watchChange plugin hook to watch changed files, deprecate asset dependencies ([#2405](https://github.com/rollup/rollup/pull/2405))
* Refine asset handling ([#2369](https://github.com/rollup/rollup/pull/2369))
* Implement `renderChunk` hook to replace `transformChunk` and `transformBundle` hooks ([#2406](https://github.com/rollup/rollup/pull/2406))
* Add rollup version to plugin context ([#2394](https://github.com/rollup/rollup/pull/2394))
* Do not resume stdin in watch mode to fix it for Lerna users ([#2410](https://github.com/rollup/rollup/pull/2410))
* Allow `[format]` placeholder for id generation ([#2387](https://github.com/rollup/rollup/pull/2387))
* Always log error stacks even when a code frame is given ([#2417](https://github.com/rollup/rollup/pull/2417))
* Do not test module ids starting with `\0` as external ([#2400](https://github.com/rollup/rollup/pull/2400))
* Fix tracing of namespace variables ([#2408](https://github.com/rollup/rollup/pull/2408))
* Fix re-tracing of namespace variables ([#2420](https://github.com/rollup/rollup/pull/2420))
* Properly wrap comment annotations in SystemJS exports ([#2408](https://github.com/rollup/rollup/pull/2408))
* Fix renaming of destructured parameters ([#2419](https://github.com/rollup/rollup/pull/2419))
* Do not display version in watch mode when using `--silent` ([#2392](https://github.com/rollup/rollup/pull/2392))
* Make `cacheExpiry` an experimental option for now ([#2401](https://github.com/rollup/rollup/pull/2401))
* Lint test configs on commit ([#2402](https://github.com/rollup/rollup/pull/2402))
* Add code of conduct ([#2388](https://github.com/rollup/rollup/pull/2388))
* Move to CircleCI ([#2390](https://github.com/rollup/rollup/pull/2390))
* Update pull request template ([#2404](https://github.com/rollup/rollup/pull/2404))

## 0.64.1
*2018-08-07*
* Do not render initializers of hoisted variables in dead branches ([#2384](https://github.com/rollup/rollup/pull/2384))

## 0.64.0
*2018-08-07*
* Print memory consumption together with performance timings ([#2370](https://github.com/rollup/rollup/pull/2370))
* Enable plugins to mark imports as external by returning false for resolveId ([#2351](https://github.com/rollup/rollup/pull/2351))
* Always retain empty manual chunks ([#2362](https://github.com/rollup/rollup/pull/2362))
* Ensure CLI warnings are shown on errors and add error for external id collisions ([#2334](https://github.com/rollup/rollup/pull/2334))
* Remove unnecessary dependency, update dependencies, fix linting of test config ([#2376](https://github.com/rollup/rollup/pull/2376))
* Add targeted Github issue templates ([#2356](https://github.com/rollup/rollup/pull/2356))

## 0.63.5
*2018-08-01*
* Ensure onwrite plugin hooks execute in sequence ([#2364](https://github.com/rollup/rollup/pull/2364))
* Always warn when no name is provided for a global module ([#2359](https://github.com/rollup/rollup/pull/2359))
* Add utility type for user created plugins ([#2355](https://github.com/rollup/rollup/pull/2355))
* Remove deprecated es6 format from types ([#2349](https://github.com/rollup/rollup/pull/2349))
* Mark inlineDynamicImports as optional in types ([#2348](https://github.com/rollup/rollup/pull/2348))

## 0.63.4
*2018-07-20*
* Use turbocolor instead of chalk ([#2339](https://github.com/rollup/rollup/pull/2339))

## 0.63.3
*2018-07-20*
* Handle expressions where "in" and "instanceof" are applied to primitive values ([#2344](https://github.com/rollup/rollup/pull/2344))

## 0.63.2
*2018-07-18*
* Fix bind order in for-of loops ([#2338](https://github.com/rollup/rollup/pull/2338))

## 0.63.1
*2018-07-18*

## 0.63.0
*2018-07-17*
* Fix many tree-shaking related issues ([#2315](https://github.com/rollup/rollup/pull/2315))
* Add experimental support for top-level await ([#2235](https://github.com/rollup/rollup/pull/2235))
* Prevent duplicate version printout in watch mode ([#2325](https://github.com/rollup/rollup/pull/2325))
* Respect error frames provided by plugins ([#2309](https://github.com/rollup/rollup/pull/2309))
* Add `esm` format alias to types ([#2327](https://github.com/rollup/rollup/pull/2327))
* Further unify internal test setup ([#2329](https://github.com/rollup/rollup/pull/2329))

## 0.62.0
*2018-06-27*
* Add option to automatically shim missing exports ([#2118](https://github.com/rollup/rollup/pull/2118))
* Inline dynamic imports that are also imported statically and only used in a single chunk ([#2295](https://github.com/rollup/rollup/pull/2295))
* Handle caching and invalidation of assets ([#2267](https://github.com/rollup/rollup/pull/2267))
* Fix plugin related types ([#2299](https://github.com/rollup/rollup/pull/2299))

## 0.61.2
*2018-06-23*
* Improve watcher error handling, only rebuild invalidated outputs ([#2296](https://github.com/rollup/rollup/pull/2296))
* Update dependencies, make watcher more stable ([#2297](https://github.com/rollup/rollup/pull/2297))

## 0.61.1
*2018-06-21*
* Do not try to deconflict "undefined" ([#2291](https://github.com/rollup/rollup/pull/2291))
* Properly track values for loop interator declarations and reassigned namespaces, add smoke test ([#2292](https://github.com/rollup/rollup/pull/2292))

## 0.61.0
*2018-06-20*
* Declare file dependencies via transform plugin hooks ([#2259](https://github.com/rollup/rollup/pull/2259))
* Handle undefined values when evaluating conditionals ([#2264](https://github.com/rollup/rollup/pull/2264))
* Handle known undefined properties when evaluating conditionals ([#2265](https://github.com/rollup/rollup/pull/2265))
* Access watch events via the plugin context ([#2261](https://github.com/rollup/rollup/pull/2261))
* Add option to suppress `__esModule` flag in output ([#2287](https://github.com/rollup/rollup/pull/2287))
* Fix issue when re-declaring variables, track reassignments in more cases ([#2279](https://github.com/rollup/rollup/pull/2279))
* Add VSCode debug settings ([#2276](https://github.com/rollup/rollup/pull/2276))

## 0.60.7
*2018-06-14*
* Fix typing issue ([#2269](https://github.com/rollup/rollup/pull/2269))

## 0.60.6
*2018-06-14*
* Track mutations of included virtual arrays ([#2263](https://github.com/rollup/rollup/pull/2263))
* Update readme ([#2266](https://github.com/rollup/rollup/pull/2266))

## 0.60.5
*2018-06-14*
* Track deep reassignments of global and exported variables and improve performance ([#2254](https://github.com/rollup/rollup/pull/2254))

## 0.60.4
*2018-06-13*
* Properly handle initially uninitialized exports and exports of globals in SystemJS output ([#2258](https://github.com/rollup/rollup/pull/2258))

## 0.60.3
*2018-06-13*
* Fix types to allow watching an array of outputs ([#2262](https://github.com/rollup/rollup/pull/2262))

## 0.60.2
*2018-06-11*
* Permit setting an asset's source in `generateBundle` ([#2256](https://github.com/rollup/rollup/pull/2256))
* Add automatic linting ([#2242](https://github.com/rollup/rollup/pull/2242))

## 0.60.1
*2018-06-07*
* Fix plugin regressions ([#2246](https://github.com/rollup/rollup/pull/2246))
* Avoid conflicts for large numbers of variables ([#2244](https://github.com/rollup/rollup/pull/2244))

## 0.60.0
*2018-06-06*
* New plugin hooks: transformChunk, buildStart, buildEnd; extended plugin context with warn, error, resolveId, isExternal, emitAsset, setAssetSource and getAssetFileName available to any hook ([#2208](https://github.com/rollup/rollup/pull/2208))
* [BREAKING] Deprecate the `legacy` option and thus IE8 support ([#2141](https://github.com/rollup/rollup/pull/2141))
* Detect more known extensions and load .mjs without extension ([#2211](https://github.com/rollup/rollup/pull/2211))
* Add compact output mode ([#2151](https://github.com/rollup/rollup/pull/2151))
* Significantly improve sourcemap generation performance ([#2228](https://github.com/rollup/rollup/pull/2228))
* Enable naming SystemJS modules ([#2028](https://github.com/rollup/rollup/pull/2028))
* Do not use alternate screen if clearScreen is set in watch mode ([#2125](https://github.com/rollup/rollup/pull/2125))
* Allow object input form for code-splitting in watch mode ([#2217](https://github.com/rollup/rollup/pull/2217))
* Track reassignments of methods of exports from outside ([#2240](https://github.com/rollup/rollup/pull/2240))
* Preserve id of default exported functions and classes ([#2234](https://github.com/rollup/rollup/pull/2234))
* Add semicolons after default exports ([#2209](https://github.com/rollup/rollup/pull/2209))
* Fix build problems on Windows ([#2232](https://github.com/rollup/rollup/pull/2232))
* Display install size in readme ([#2196](https://github.com/rollup/rollup/pull/2196))
* Improve preserve modules test ([#2236](https://github.com/rollup/rollup/pull/2236))

## 0.59.4
*2018-05-28*
* Fix performance regression when many return statements are used ([#2218](https://github.com/rollup/rollup/pull/2218))

## 0.59.3
*2018-05-24*
* Fix reassignment tracking for constructor parameters ([#2214](https://github.com/rollup/rollup/pull/2214))

## 0.59.2
*2018-05-21*
* Fix reassignment tracking in for-in loops ([#2205](https://github.com/rollup/rollup/pull/2205))

## 0.59.1
*2018-05-16*
* Fix infinite recursion when determining literal values of circular structures ([#2193](https://github.com/rollup/rollup/pull/2193))
* Fix invalid code when simplifying expressions without spaces ([#2194](https://github.com/rollup/rollup/pull/2194))

## 0.59.0
*2018-05-15*
* Tree-shake statically analysable dynamic conditionals ([#2167](https://github.com/rollup/rollup/pull/2167))
* Do not emit empty chunks when code-splitting or empty files when preserving modules ([#2128](https://github.com/rollup/rollup/pull/2128))
* Support `import.meta.url` ([#2164](https://github.com/rollup/rollup/pull/2164))
* Add `esm` format alias ([#2102](https://github.com/rollup/rollup/pull/2102))
* Use alphanumeric base64 characters when deconflicting variables ([#2188](https://github.com/rollup/rollup/pull/2188))
* Improve handling of external modules imported as both default and named imports ([#2136](https://github.com/rollup/rollup/pull/2136))
* Properly deconflict named imports from other chunks ([#2177](https://github.com/rollup/rollup/pull/2177))
* Fix an issue with namespaces containing reexports ([#2157](https://github.com/rollup/rollup/pull/2157))
* Fix an issue with with incorrectly mapped default exports when code-splitting CJS or AMD modules ([#2178](https://github.com/rollup/rollup/pull/2178))
* Fix an issue with wrong paths of relative external imports ([#2160](https://github.com/rollup/rollup/pull/2160))
* Fix an issue when using default exports and `interop: false` ([#2149](https://github.com/rollup/rollup/pull/2149))
* Fix in issue with invalid syntax in SystemJS output ([#2187](https://github.com/rollup/rollup/pull/2187))
* Fix an issue when tree-shaking call expressions and reassigned variables ([#2186](https://github.com/rollup/rollup/pull/2186))
* Fix file paths in source maps ([#2161](https://github.com/rollup/rollup/pull/2161))
* Fix wrong file name in error message ([#2137](https://github.com/rollup/rollup/pull/2137))
* Always use npm 5 on CI ([#2185](https://github.com/rollup/rollup/pull/2185))

## 0.58.2
*2018-04-23*
* Fix rendering of certain statically resolvable if statements ([#2146](https://github.com/rollup/rollup/pull/2146))

## 0.58.1
*2018-04-18*
* Fix comment detection ([#2129](https://github.com/rollup/rollup/pull/2129))

## 0.58.0
*2018-04-16*
* Support individual chunk names with optional content hashes ([#2068](https://github.com/rollup/rollup/pull/2068))
* Support manually created chunks ([#2084](https://github.com/rollup/rollup/pull/2084))
* Automatically import deep dependencies when code splitting for better performance ([#2073](https://github.com/rollup/rollup/pull/2073))
* Automatically minify internal export/import names for esm and system output ([#2087](https://github.com/rollup/rollup/pull/2087))
* Add option to automatically merge small chunks ([#2090](https://github.com/rollup/rollup/pull/2090))
* Significantly improve tree-shaking performance ([#2119](https://github.com/rollup/rollup/pull/2119))
* Enable tree-shaking for logical expressions ([#2098](https://github.com/rollup/rollup/pull/2098))
* Rework external types and reduce type related dependencies ([#2108](https://github.com/rollup/rollup/pull/2108))
* Support parallel dependency resolution ([#2116](https://github.com/rollup/rollup/pull/2116))
* Improve deprecation handling ([#2076](https://github.com/rollup/rollup/pull/2076))
* Enable `--perf` timings in watch mode ([#2065](https://github.com/rollup/rollup/pull/2065))
* Improve performance timers ([#2111](https://github.com/rollup/rollup/pull/2111))
* Improve error handling for plugins ([#2100](https://github.com/rollup/rollup/pull/2100))
* Improve error when using `--dir` in a single file build ([#2123](https://github.com/rollup/rollup/pull/2123))
* Do not warn for external imports that are unused due to tree-shaking ([#2124](https://github.com/rollup/rollup/pull/2124))
* Update mixed export warning message ([#2107](https://github.com/rollup/rollup/pull/2107))
* Remove duplicate badges from readme ([#2083](https://github.com/rollup/rollup/pull/2083))
* Update readme examples ([#2086](https://github.com/rollup/rollup/pull/2086))

## 0.57.1
*2018-03-17*
* Improve sourcemap generation performance ([#2062](https://github.com/rollup/rollup/pull/2062))
* Add reserved config option namespace and improve CLI interface ([#2063](https://github.com/rollup/rollup/pull/2063))
* Fix issue with default exported function and class expressions ([#2059](https://github.com/rollup/rollup/pull/2059))
* Replace `forEach` with faster `for` loops in some places ([#2064](https://github.com/rollup/rollup/pull/2064))

## 0.57.0
*2018-03-15*
* Add option to preserve the module structure instead of bundling ([#1922](https://github.com/rollup/rollup/pull/1922))
* Enable watch mode when code-splitting ([#2035](https://github.com/rollup/rollup/pull/2035))
* Optionally pass CLI commands to config file ([#1926](https://github.com/rollup/rollup/pull/1926))
* Option to add correct `.toString` tags to namespaces ([#2041](https://github.com/rollup/rollup/pull/2041))
* Option and scripts to display performance timings ([#2045](https://github.com/rollup/rollup/pull/2045))
* Fixes for exported or early accessed namespaces + improved namespace indentation ([#2041](https://github.com/rollup/rollup/pull/2041))
* Include missing TypeScript dependencies ([#1965](https://github.com/rollup/rollup/pull/1965))
* Add #_PURE annotation to frozen namespaces ([#2044](https://github.com/rollup/rollup/pull/2044))
* Improve sourcemap and tree-shaking performance ([#2052](https://github.com/rollup/rollup/pull/2052))
* Inline sourcemap lookups and make rollup smaller ([#2055](https://github.com/rollup/rollup/pull/2055))
* Use updated magic-string types ([#2057](https://github.com/rollup/rollup/pull/2057))
* [BREAKING] Revert class id preservation from #2025 ([#2048](https://github.com/rollup/rollup/pull/2048))
* [BREAKING] Refactor missing export plugin hook ([#1987](https://github.com/rollup/rollup/pull/1987))

## 0.56.5
*2018-03-07*
* Preserve ids when deconflicting classes ([#2025](https://github.com/rollup/rollup/pull/2025))
* Fix an issue with re-exported namespace imports ([#2034](https://github.com/rollup/rollup/pull/2034))
* Prevent an infinite loop when binding member expressions ([#1963](https://github.com/rollup/rollup/pull/1963))
* Convert code style via prettier ([#2031](https://github.com/rollup/rollup/pull/2031))
* Fix links in documentation ([#2026](https://github.com/rollup/rollup/pull/2026))

## 0.56.4
*2018-03-05*
* Make rollup builds reproducible ([#2024](https://github.com/rollup/rollup/pull/2024))
* Improve error handling for source maps ([#2012](https://github.com/rollup/rollup/pull/2012))
* Properly handle SystemJS default exports without semicolons ([#2019](https://github.com/rollup/rollup/pull/2019))
* Properly handle importing the same variable several times when code-splitting ([#2020](https://github.com/rollup/rollup/pull/2020))
* Improve re-export tracing ([#2021](https://github.com/rollup/rollup/pull/2021))
* Apply "prettier" on commit ([#2017](https://github.com/rollup/rollup/pull/2017))
* Automatically clean up outdated tests ([#2009](https://github.com/rollup/rollup/pull/2009))
* Add SystemJS output to form tests ([#2022](https://github.com/rollup/rollup/pull/2022))
* Improve internal build configuration ([#2016](https://github.com/rollup/rollup/pull/2016))

## 0.56.3
*2018-02-25*
* Fix issues around default exports and module facades ([#2001](https://github.com/rollup/rollup/pull/2001))
* Improve and fix internal chunk interface ([#1994](https://github.com/rollup/rollup/pull/1994))
* Fix superfluous semicolons added after declarations ([#1999](https://github.com/rollup/rollup/pull/1999))
* Improve code-splitting tests ([#1990](https://github.com/rollup/rollup/pull/1990))

## 0.56.2
*2018-02-19*
* Fix handling of reassigned default exports ([#1975](https://github.com/rollup/rollup/pull/1975))
* Fix handling of renamed exports in entry points ([#1977](https://github.com/rollup/rollup/pull/1977))
* Update internal TypeScript version ([#1980](https://github.com/rollup/rollup/pull/1980))
* Omit compiled source files from published types ([#1981](https://github.com/rollup/rollup/pull/1981))
* Fix example in readme file ([#1984](https://github.com/rollup/rollup/pull/1984))
* Fix non-replaced dynamic imports in non-ESM output ([#1985](https://github.com/rollup/rollup/pull/1985))

## 0.56.1
*2018-02-16*
* Fix regression when rendering switch statements ([#1971](https://github.com/rollup/rollup/pull/1971))

## 0.56.0
*2018-02-15*
* Update to ECMAScript 2018 ([#1953](https://github.com/rollup/rollup/pull/1953))
* Rework tree-shaking rendering algorithm ([#1949](https://github.com/rollup/rollup/pull/1949))
* Tree-shake pure prototype calls on literals ([#1916](https://github.com/rollup/rollup/pull/1916))
* Expose AST parser to plugins ([#1945](https://github.com/rollup/rollup/pull/1945))
* Fix namespace re-export deconflicting ([#1960](https://github.com/rollup/rollup/pull/1960))
* Allow globals to be re-exported ([#1959](https://github.com/rollup/rollup/pull/1959))
* Fix internal performance timers ([#1966](https://github.com/rollup/rollup/pull/1966))

## 0.55.5
*2018-02-10*
* Remove OpenCollective dependency ([#1915](https://github.com/rollup/rollup/pull/1915))

## 0.55.4
*2018-02-09*
* Improve name deconflicting of external variables ([#1930](https://github.com/rollup/rollup/pull/1930))
* Improve re-export handling ([#1947](https://github.com/rollup/rollup/pull/1947))
* Mark preserveSymlinks option as optional ([#1939](https://github.com/rollup/rollup/pull/1939))
* Enable code-splitting tests to check directory structures ([#1924](https://github.com/rollup/rollup/pull/1924))
* Improve TypeScript definition test ([#1954](https://github.com/rollup/rollup/pull/1954))

## 0.55.3
*2018-02-01*
* Remove OpenCollective dependency ([#1915](https://github.com/rollup/rollup/pull/1915))

## 0.55.2
*2018-02-01*
* Add option to not follow symlinks ([#1819](https://github.com/rollup/rollup/pull/1819))
* Fix crash in windows shell ([#1928](https://github.com/rollup/rollup/pull/1928))
* Fix and test for external TypeScript errors ([#1903](https://github.com/rollup/rollup/pull/1903))
* Activate OpenCollective ([#1915](https://github.com/rollup/rollup/pull/1915))
* Optimize CI scripts ([#1921](https://github.com/rollup/rollup/pull/1921))

## 0.55.1
*2018-01-26*
* Improve dynamic import workflow ([#1907](https://github.com/rollup/rollup/pull/1907))
* Properly handle multiple dynamic imports of the same module ([#1911](https://github.com/rollup/rollup/pull/1911))
* Fix import specifier deshadowing ([#1912](https://github.com/rollup/rollup/pull/1912))
* Allow plugin load hook to return an empty string ([#1908](https://github.com/rollup/rollup/pull/1908))
* Let onwarn handler accept strings ([#1905](https://github.com/rollup/rollup/pull/1905))

## 0.55.0
*2018-01-23*
* Support code splitting ([#1841](https://github.com/rollup/rollup/pull/1841))
* Support SystemJS as output format ([#1897](https://github.com/rollup/rollup/pull/1897))
* Allow injecting acorn plugins ([#1857](https://github.com/rollup/rollup/pull/1857))
* Add `missingExport` plugin hook ([#1845](https://github.com/rollup/rollup/pull/1845))
* No longer parse config files via bublé ([#1899](https://github.com/rollup/rollup/pull/1899))
* Use externally maintained dynamic import acorn plugin ([#1891](https://github.com/rollup/rollup/pull/1891))
* Fix an error message ([#1886](https://github.com/rollup/rollup/pull/1886))
* Refactor internal rendering options ([#1900](https://github.com/rollup/rollup/pull/1900))
* Extract internal path resolution ([#1879](https://github.com/rollup/rollup/pull/1879))
* Extract internal bundle option handling ([#1880](https://github.com/rollup/rollup/pull/1880))
* Add import description type ([#1884](https://github.com/rollup/rollup/pull/1884))
* Clean up watch options types ([#1860](https://github.com/rollup/rollup/pull/1860))
* Clean up some tests ([#1888](https://github.com/rollup/rollup/pull/1888))

## 0.54.1
*2018-01-17*
* Fix TypeScript errors in emitted type definitions ([#1871](https://github.com/rollup/rollup/pull/1871))

## 0.54.0
*2018-01-12*
* Automatically inline locally resolvable dynamic imports ([#1816](https://github.com/rollup/rollup/pull/1816))
* Preserve directives in function bodies ([#1856](https://github.com/rollup/rollup/pull/1856))
* Refactor an error notification ([#1846](https://github.com/rollup/rollup/pull/1846))
* Refactor a wrong import ([#1863](https://github.com/rollup/rollup/pull/1863))
* Improve emitted TypeScript definitions ([#1864](https://github.com/rollup/rollup/pull/1864))
* Refactor unused import ([#1866](https://github.com/rollup/rollup/pull/1866))

## 0.53.4
*2018-01-10*
* More type cleanup ([#1858](https://github.com/rollup/rollup/pull/1858))
* Use chalks internal helper to detect if colors should be used ([#1853](https://github.com/rollup/rollup/pull/1853))
* Refactor entity handling to use interfaces ([#1840](https://github.com/rollup/rollup/pull/1840))
* Use immutable.js internal types ([#1844](https://github.com/rollup/rollup/pull/1844))
* Ship `TypeScript` declaration files ([#1837](https://github.com/rollup/rollup/pull/1837))

## 0.53.3
*2018-01-02*
* Use correct name when re-exporting from external modules ([#1794](https://github.com/rollup/rollup/pull/1794))
* Disable warnings when `resolveId` returns false ([#1825](https://github.com/rollup/rollup/pull/1825))

## 0.53.2
*2017-12-30*
* Properly handle output arrays in the JavaScript API ([#1827](https://github.com/rollup/rollup/pull/1827))

## 0.53.1
*2017-12-28*
* Properly deprecate more config options ([#1812](https://github.com/rollup/rollup/pull/1812))
* Pass output options to `transformBundle` plugin hook ([#1813](https://github.com/rollup/rollup/pull/1813))

## 0.53.0
*2017-12-22*
* Experimental dynamic import support ([#1790](https://github.com/rollup/rollup/pull/1790))
* Unify config validation ([#1805](https://github.com/rollup/rollup/pull/1805))

## 0.52.3
*2017-12-19*
* Properly hoist default exported functions in more situations ([#1799](https://github.com/rollup/rollup/pull/1799))
* Allow plugin transformations to not overwrite source maps by returning null ([#1797](https://github.com/rollup/rollup/pull/1797))
* Provide more parameters to "external" handler ([#1792](https://github.com/rollup/rollup/pull/1792))

## 0.52.2
*2017-12-15*
* No longer ignore side-effects in JSON.parse and JSON.stringify ([#1785](https://github.com/rollup/rollup/pull/1785))
* Updated links in warnings ([#1776](https://github.com/rollup/rollup/pull/1776))
* No longer prevent self-imports ([#1777](https://github.com/rollup/rollup/pull/1777))
* Properly hoist default exported functions ([#1787](https://github.com/rollup/rollup/pull/1787))
* Prevent corruption when re-exporting default exports ([#1765](https://github.com/rollup/rollup/pull/1765))

## 0.52.1
*2017-12-05*
* Improve deprecation warnings ([#1765](https://github.com/rollup/rollup/pull/1765))
* Properly use stdin ([#1774](https://github.com/rollup/rollup/pull/1774))
* Let --environment be used multiple times ([#1768](https://github.com/rollup/rollup/pull/1768))
* Always transpile config files ([#1759](https://github.com/rollup/rollup/pull/1759))
* Respect globals option in headers of UMD and IIFE files ([#1747](https://github.com/rollup/rollup/pull/1747))

## 0.52.0
*2017-11-25*
* Accept config as promise ([#1731](https://github.com/rollup/rollup/pull/1731))
* Accept promises for intro/outro/banner/footer ([#1253](https://github.com/rollup/rollup/pull/1253))
* Option to prevent freezing of namespace imports ([#1696](https://github.com/rollup/rollup/pull/1696))
* Option to retain all output in watch mode ([#1688](https://github.com/rollup/rollup/pull/1688))
* Options to fine-tune treeshaking ([#1760](https://github.com/rollup/rollup/pull/1760))

## 0.51.8
*2017-11-19*
* Fix speed problems by simplifying treeshaking reassignment handling ([#1740](https://github.com/rollup/rollup/pull/1740))
* Update dependencies ([#1742](https://github.com/rollup/rollup/pull/1742))

## 0.51.7
*2017-11-17*
* Keep "this"-context when calling sequence expressions ([#1724](https://github.com/rollup/rollup/pull/1724))

## 0.51.6
*2017-11-16*
* Use sourcemaps to determine error locations ([#1728](https://github.com/rollup/rollup/pull/1728))

## 0.51.5
*2017-11-11*
* Fix regressions with uninitialised conditional expressions ([#1720](https://github.com/rollup/rollup/pull/1720))

## 0.51.4
*2017-11-11*
* Fix regressions preventing builds ([#1725](https://github.com/rollup/rollup/pull/1725))

## 0.51.3
*2017-11-10*
* Fix regression when treeshaking sequence expressions ([#1717](https://github.com/rollup/rollup/pull/1717))

## 0.51.2
*2017-11-09*
* Fix treeshaking regression when labels are used inside functions ([#1712](https://github.com/rollup/rollup/pull/1712))

## 0.51.1
*2017-11-08*
* Fix an issue with empty return statements ([#1704](https://github.com/rollup/rollup/pull/1704))

## 0.51.0
*2017-11-08*
* Massive improvements to the treeshaking algorithm ([#1667](https://github.com/rollup/rollup/pull/1667))

## 0.50.1
*2017-11-08*
* Fix treeshaking regression ([#1695](https://github.com/rollup/rollup/pull/1695))
* Treeshaking improvements ([#1650](https://github.com/rollup/rollup/pull/1650))
* Enable installation from Github ([#1670](https://github.com/rollup/rollup/pull/1670))
* Update documentation ([#1660](https://github.com/rollup/rollup/pull/1660))

## 0.50.0
*2017-09-16*
* Many treeshaking improvements ([#1624](https://github.com/rollup/rollup/pull/1624))
* Show finish time in watch mode ([#1620](https://github.com/rollup/rollup/pull/1620))

## 0.49.3
*2017-09-08*
* Respect `watch` options ([#1596](https://github.com/rollup/rollup/issues/1596))
* Fix treeshaking regressions ([#1604](https://github.com/rollup/rollup/pull/1604))
* Allow `-o` to work with `output.format` ([#1606](https://github.com/rollup/rollup/pull/1606))

## 0.49.2
*2017-08-29*
* Fix treeshaking regressions ([#1591](https://github.com/rollup/rollup/pull/1591))

## 0.49.1
*2017-08-28*
* Fix treeshaking regressions ([#1586](https://github.com/rollup/rollup/pull/1586))

## 0.49.0
*2017-08-27*
* Completely update the treeshaking algorithm ([#1582](https://github.com/rollup/rollup/pull/1582))
* Only flip screen buffer if appropriate ([#1574](https://github.com/rollup/rollup/pull/1574))
* Guard against two instances creating the same dir ([#1576](https://github.com/rollup/rollup/pull/1576))

## 0.48.2

* Paths is an output option ([#1569](https://github.com/rollup/rollup/pull/1569))

## 0.48.1

* Print deprecation warnings in watch mode, and fix options when watcher restarts ([#1568](https://github.com/rollup/rollup/pull/1568))

## 0.48.0

* Numerous changes to the `options` object and CLI arguments ([#1479](https://github.com/rollup/rollup/issues/1479)). See [this gist](https://gist.github.com/Rich-Harris/d472c50732dab03efeb37472b08a3f32) for a rundown.

## 0.47.6

* Set `process.env.ROLLUP_WATCH` *before* loading config file

## 0.47.5

* Fix broken multi-bundle configs with `rollup.watch` ([#1532](https://github.com/rollup/rollup/issues/1532))

## 0.47.4

* Delete cached config file before reloading in watch mode

## 0.47.3

* Deshadow aliased imports ([#1550](https://github.com/rollup/rollup/issues/1550))

## 0.47.2

* Rebuild with dependency that npm randomly deleted

## 0.47.1

* Ignore external namespace imports when deshadowing ([#1547](https://github.com/rollup/rollup/issues/1547))

## 0.47.0

* Watch config file, restart `rollup.watch` on change ([#1535](https://github.com/rollup/rollup/issues/1535))
* Correctly render `export { foo } from` declarations in `es` output ([#1543](https://github.com/rollup/rollup/pull/1543))
* Reinstate missing `rollup.VERSION`

## 0.46.3

* init for/for-of loop section head with correct scopes ([#1538](https://github.com/rollup/rollup/issues/1538), [#1539](https://github.com/rollup/rollup/issues/1539))
* Fix namespace imports and re-exports in `es` output ([#1511](https://github.com/rollup/rollup/issues/1511))
* Deshadow indirectly imported namespaces ([#1488](https://github.com/rollup/rollup/issues/1488), [#1505](https://github.com/rollup/rollup/issues/1505))

## 0.46.2

* Pass options to `bundle.write` correctly in `rollup.watch` ([#1533](https://github.com/rollup/rollup/issues/1533))
* init for-in loop section head with correct scopes ([#1480](https://github.com/rollup/rollup/issues/1480))
* support `--no-interop` flag ([#1524](https://github.com/rollup/rollup/issues/1524))

## 0.46.1

* Remove `rollup.watch` from browser build ([#1530](https://github.com/rollup/rollup/issues/1530))
* Remove `source-map-support` dependency ([#1528](https://github.com/rollup/rollup/issues/1528))

## 0.46.0

* `options.format` is now required ([#1491](https://github.com/rollup/rollup/pull/1491))
* if `options.format` is `es6`, it will now throw an error (should be `es`) ([#1491](https://github.com/rollup/rollup/pull/1491))
* Add experimental `rollup.watch` method, replacing [rollup-watch](https://github.com/rollup/rollup-watch) ([#1491](https://github.com/rollup/rollup/pull/1491))
* Batch warnings together in CLI output ([#1491](https://github.com/rollup/rollup/pull/1491))
* Clear screen between rebuilds in `--watch` mode ([#1491](https://github.com/rollup/rollup/pull/1491))
* `onwarn` function's second argument is the default handler, allowing easier filtering without reimplementing any logic ([#1491](https://github.com/rollup/rollup/pull/1491))
* Prevent semi-colon removal after variable declaration that is for loop body ([#1275](https://github.com/rollup/rollup/issues/1275))
* Return `exports` for namespaced but non-extended IIFE bundles ([#1492](https://github.com/rollup/rollup/issues/1492))
* Fix scoping in switch statements ([#1498](https://github.com/rollup/rollup/pull/1498))
* Handle side-effects in tagged template expressions ([#1508](https://github.com/rollup/rollup/pull/1508))
* More descriptive error for missing options.format ([#1510](https://github.com/rollup/rollup/pull/1510))
* Refactor scope handling ([#1517](https://github.com/rollup/rollup/pull/1517))
* Handle failure of a config in multi-config build ([#1513](https://github.com/rollup/rollup/issues/1513))


## 0.45.2

* Fix interop when import is a string ([#1486](https://github.com/rollup/rollup/issues/1486))
* Separate `resolvedIds` from `resolvedExternalIds` ([#1490](https://github.com/rollup/rollup/pull/1490))
* Add `--extend` flag to CLI ([#1482](https://github.com/rollup/rollup/pull/1482))

## 0.45.1

* Remove `weak` from `optionalDependencies` ([#1483](https://github.com/rollup/rollup/issues/1483))

## 0.45.0

* [BREAKING] `bundle.generate(...)` returns a Promise, so that `transformBundle` plugin hooks can be asynchronous ([#1474](https://github.com/rollup/rollup/issues/1474))

## 0.44.0

* [BREAKING] Don't extend existing globals, unless `options.extend` is true ([#827](https://github.com/rollup/rollup/issues/827))
* Fix handling of catch clause parameters ([#1462](https://github.com/rollup/rollup/issues/1462))

## 0.43.1

* Fix memory leak on incremental rebuilds ([#883](https://github.com/rollup/rollup/issues/883))
* Allow `this.warn` and `this.error` to accept a `{line, column}` object as an alternative to a character index ([#1265](https://github.com/rollup/rollup/issues/1265))
* Print more useful error if entry module is 'external' ([#1264](https://github.com/rollup/rollup/issues/1264))
* Catch errors in `bundle.generate` options ([#1463](https://github.com/rollup/rollup/pull/1463))
* Fix magic-string deprecation warning ([#1445](https://github.com/rollup/rollup/pull/1445))

## 0.43.0

* Allow config files to import JSON ([#1426](https://github.com/rollup/rollup/issues/1426))
* Allow undefined imports in interop block ([#1341](https://github.com/rollup/rollup/issues/1341))
* Add `process.env.ROLLUP_WATCH = 'true'` in watch mode ([#1429](https://github.com/rollup/rollup/issues/1429))
* Add `pureExternalModules` option ([#1352](https://github.com/rollup/rollup/issues/1352))
* Allow plugins to specify `options.entry` ([#1270](https://github.com/rollup/rollup/issues/1270))
* Update dependencies

## 0.42.0

* Deprecate `options.moduleId` in favour of `options.amd.id` ([#1365](https://github.com/rollup/rollup/pull/1365))
* Add `options.amd.define` option to specify name of AMD `define` function ([#1365](https://github.com/rollup/rollup/pull/1365))
* Fix incorrect class removal with `treeshake: false` ([#1375](https://github.com/rollup/rollup/pull/1375))
* Deconflict module exports imported as namespaces ([#1384](https://github.com/rollup/rollup/issues/1384))
* Handle bare self-imports ([#1274](https://github.com/rollup/rollup/issues/1274))
* Allow config file to export an array of multiple configs ([#1389](https://github.com/rollup/rollup/pull/1389))
* Handle exponentiation operator, and fail gracefully on unknown operators ([#1416](https://github.com/rollup/rollup/issues/1416))
* Add `watch` option ([#1424](https://github.com/rollup/rollup/pull/1424))

## 0.41.6

* Preserve `originalSourceMap` on incremental rebuilds for loaders with sourcemaps ([#1336](https://github.com/rollup/rollup/issues/1336))

## 0.41.5

* Wrap ternary consequent/alternate sequences in parens ([#1273](https://github.com/rollup/rollup/issues/1273))
* Fix erroneous warning on multiple `export * from` declarations with defaults ([#1278](https://github.com/rollup/rollup/issues/1278))
* Prevent variable conflicts with `treeshake: false` ([#1268](https://github.com/rollup/rollup/issues/1268))
* Allow missing `source` when collapsing sourcemaps ([#1254](https://github.com/rollup/rollup/issues/1254))
* Allow plugins to log with strings ([#1316](https://github.com/rollup/rollup/pull/1316))

## 0.41.4

* Fix cases of multiple `export * from 'external'` declarations ([#1252](https://github.com/rollup/rollup/issues/1252))
* Fix 'TODO' error message ([#1257](https://github.com/rollup/rollup/issues/1257))

## 0.41.3

* Don't treat `this.foo` as possible namespace ([#1258](https://github.com/rollup/rollup/issues/1258))

## 0.41.2

* Optimize `namespace['foo']` references ([#1240](https://github.com/rollup/rollup/pull/1240))

## 0.41.1

* Include `new` expressions where callee is a class with side-effects ([#980](https://github.com/rollup/rollup/issues/980) [#1233](https://github.com/rollup/rollup/issues/1233))

## 0.41.0

* Add `this.warn(...)` and `this.error(...)` methods to plugin `transform` hook contexts ([#1140](https://github.com/rollup/rollup/issues/1140))
* `throw` always considered to be a side effect ([#1227](https://github.com/rollup/rollup/pull/1227))

## 0.40.2

* Add `file` property to sourcemaps for bundles with plugins ([#986](https://github.com/rollup/rollup/issues/986))
* Don't require globals for empty imports ([#1217](https://github.com/rollup/rollup/issues/1217))

## 0.40.1

* Allow missing space between `export default` and declaration ([#1218](https://github.com/rollup/rollup/pull/1218))

## 0.40.0

* [BREAKING] Better, more consistent error logging ([#1212](https://github.com/rollup/rollup/pull/1212))
* Don't use colours and emojis for non-TTY stderr ([#1201](https://github.com/rollup/rollup/issues/1201))

## 0.39.2

* Prevent mutation of cached ASTs (fixes stack overflow with rollup-watch) ([#1205](https://github.com/rollup/rollup/pull/1205))

## 0.39.1

* Ignore `var` initialisers in dead branches ([#1198](https://github.com/rollup/rollup/issues/1198))

## 0.39.0

* [BREAKING] Warnings are objects, rather than strings ([#1194](https://github.com/rollup/rollup/issues/1194))

## 0.38.3

* More informative warning for implicit external dependencies ([#1051](https://github.com/rollup/rollup/issues/1051))
* Warn when creating browser bundle with external dependencies on Node built-ins ([#1051](https://github.com/rollup/rollup/issues/1051))
* Statically analyse LogicalExpression nodes, for better dead code removal ([#1061](https://github.com/rollup/rollup/issues/1061))

## 0.38.2

* Preserve `var` declarations in dead branches ([#997](https://github.com/rollup/rollup/issues/997))
* Warn if exporting a call expression that looks like a function declaration ([#1011](https://github.com/rollup/rollup/issues/1011))
* Wrap function expressions in parentheses if necessary ([#1011](https://github.com/rollup/rollup/issues/1011))

## 0.38.1

* Fix sourcemap comment removal ([#1104](https://github.com/rollup/rollup/issues/1104))
* Warn if empty bundle is generated ([#444](https://github.com/rollup/rollup/issues/444))
* Support ES2017 syntax ([#492](https://github.com/rollup/rollup/issues/492))
* Remove unused imports from external modules ([#595](https://github.com/rollup/rollup/issues/595))
* Remove unused function and class declarations inside function bodies ([#1108](https://github.com/rollup/rollup/issues/1108), [#1178](https://github.com/rollup/rollup/issues/1178))
* Deconflict function expression IDs ([#1176](https://github.com/rollup/rollup/issues/1176))

## 0.38.0

* [BREAKING] `export { foo as default }` creates live binding ([#1078](https://github.com/rollup/rollup/issues/1078))
* Prevent sourceMappingURL removal edge case ([#988](https://github.com/rollup/rollup/issues/988))
* Bind function expression IDs to the correct scope ([#1083](https://github.com/rollup/rollup/issues/1083))
* Correctly deshadow destructured parameters with assignments ([#1008](https://github.com/rollup/rollup/issues/1008))

## 0.37.2

* Remove unused `new` expressions without side-effects ([#179](https://github.com/rollup/rollup/issues/179))
* Only remove valid sourceMappingURL comments ([#1132](https://github.com/rollup/rollup/issues/1132))
* Ensure blocks containing activated `var` declarations are included in output ([#1113](https://github.com/rollup/rollup/issues/1113))
* Support plugin outros ([#1116](https://github.com/rollup/rollup/issues/1116))

## 0.37.1

* Follow symlinks ([#447](https://github.com/rollup/rollup/issues/447))
* Fix tree-shaking of recursive functions and other cases ([#1120](https://github.com/rollup/rollup/issues/1120), [#1142](https://github.com/rollup/rollup/issues/1142))
* Support module names that require quotes ([#582](https://github.com/rollup/rollup/issues/582), [#584](https://github.com/rollup/rollup/issues/584))
* Fix [#957](https://github.com/rollup/rollup/issues/957)

## 0.37.0

* [BREAKING] Default exports are not included in reified namespaces ([#1028](https://github.com/rollup/rollup/issues/1028))
* Parentheses do not defeat tree-shaking ([#1101](https://github.com/rollup/rollup/issues/1101), [#1128](https://github.com/rollup/rollup/issues/1128))
* More `legacy` fixes: do not create getters ([#1069](https://github.com/rollup/rollup/pull/1069)), do not include `__esModule` ([#1068](https://github.com/rollup/rollup/pull/1068)), quote reserved property names ([#1057](https://github.com/rollup/rollup/pull/1057))
* Fix missing namespace member warnings ([#1045](https://github.com/rollup/rollup/issues/1045))
* Fix TypeError in arrow function without braces returning a function ([#1062](https://github.com/rollup/rollup/pull/1062))

## 0.36.4

* Only depend on program-level call expressions ([#977](https://github.com/rollup/rollup/issues/977))

## 0.36.3

* Add `legacy` option for IE8 support ([#989](https://github.com/rollup/rollup/pull/989))

## 0.36.2

* Insert semicolons where necessary to fix broken code ([#1004](https://github.com/rollup/rollup/issues/1004))
* Include module ID and location when warning about top-level `this`  ([#1012](https://github.com/rollup/rollup/pull/1012))
* More informative error for missing exports ([#1033](https://github.com/rollup/rollup/issues/1033))
* `options.moduleContext` for per-module context overrides ([#1023](https://github.com/rollup/rollup/pull/1023))

## 0.36.1

* Include naked block statements ([#981](https://github.com/rollup/rollup/issues/981))
* Correctly include falsy alternate statements in optimised if blocks ([#973](https://github.com/rollup/rollup/issues/973))
* Prevent omission of default exports that are only used by the exporting module ([#967](https://github.com/rollup/rollup/pull/967))
* Prevent warning on `auto` exports with ES output ([#966](https://github.com/rollup/rollup/pull/966))

## 0.36.0

* `export { foo as default }` no longer creates a live binding ([#860](https://github.com/rollup/rollup/issues/860))

## 0.35.15

* Warn on missing unused imports in deshadowing phase ([#928](https://github.com/rollup/rollup/issues/928))
* Always add a newline to the end of bundles ([#958](https://github.com/rollup/rollup/issues/958))

## 0.35.14

* Include all parent statements of expression with effects, up to function boundary ([#930](https://github.com/rollup/rollup/issues/930))

## 0.35.13

* Include superclasses when including their subclasses ([#932](https://github.com/rollup/rollup/issues/932))

## 0.35.12

* Add `interop: false` option to disable unwrapping of external imports ([#939](https://github.com/rollup/rollup/issues/939))

## 0.35.11

* Deconflict reified namespaces with other declarations ([#910](https://github.com/rollup/rollup/issues/910))

## 0.35.10

* Only remove EmptyStatement nodes directly inside blocks ([#913](https://github.com/rollup/rollup/issues/931))

## 0.35.9

* Support Node 0.12 ([#909](https://github.com/rollup/rollup/issues/909))

## 0.35.8

* Correctly deshadow re-assigned module functions ([#910](https://github.com/rollup/rollup/issues/910))

## 0.35.7

* Refactor `flushTime.js` ([#922](https://github.com/rollup/rollup/pull/922))

## 0.35.6

* Fix browser build

## 0.35.5

* Allow empty for loop heads ([#919](https://github.com/rollup/rollup/issues/919))

## 0.35.4

* Preserve effects in for-of and for-in loops ([#870](https://github.com/rollup/rollup/issues/870))
* Remove empty statements ([#918](https://github.com/rollup/rollup/pull/918))

## 0.35.3

* Render identifiers inside template literals

## 0.35.2

* Fix broken build caused by out of date locally installed dependencies

## 0.35.1

* Rewrite deconflicted class identifiers ([#915](https://github.com/rollup/rollup/pull/915))
* Include `dependencies` in `bundle.modules` objects ([#903](https://github.com/rollup/rollup/issues/903))
* Update to Acorn 4 ([#914](https://github.com/rollup/rollup/pull/914))

## 0.35.0

* Rewrite analysis/tree-shaking code ([#902](https://github.com/rollup/rollup/pull/902))
* Include conditional mutations of global objects ([#901](https://github.com/rollup/rollup/issues/901))
* Only reify namespaces if necessary ([#898](https://github.com/rollup/rollup/issues/898))
* Track mutations of aliased globals ([#893](https://github.com/rollup/rollup/issues/893))
* Include duplicated var declarations ([#716](https://github.com/rollup/rollup/issues/716))

## 0.34.13

* Pass `{ format }` through to `transformBundle` ([#867](https://github.com/rollup/rollup/issues/867))

## 0.34.12

* Fix `rollup --watch` ([#887](https://github.com/rollup/rollup/issues/887))
* Case-sensitive paths ([#862](https://github.com/rollup/rollup/issues/862))

## 0.34.11

* Prevent leaky state when `bundle` is reused ([#875](https://github.com/rollup/rollup/issues/875))
* Ensure `intro` appears before interop block ([#880](https://github.com/rollup/rollup/issues/880))

## 0.34.10

* Allow custom `options.context` to replace top-level `this` ([#851](https://github.com/rollup/rollup/issues/851))
* Fix `noConflict` when used via `rollup --config` ([#846](https://github.com/rollup/rollup/issues/846))
* Place `outro` block *after* export block ([#852](https://github.com/rollup/rollup/issues/852))

## 0.34.9

* Disable indentation by default, for faster bundle generation ([#812](https://github.com/rollup/rollup/pull/812))
* More helpful error on missing entry file ([#802](https://github.com/rollup/rollup/issues/802))
* Preserve comments before import declarations ([#815](https://github.com/rollup/rollup/pull/815))

## 0.34.8

* Wrap UMD factory function in parens to avoid lazy parsing ([#774](https://github.com/rollup/rollup/pull/774))

## 0.34.7

* Leave it up to resolveId to normalize the entry path ([#835](https://github.com/rollup/rollup/pull/835))
* Cache decoded mappings ([#834](https://github.com/rollup/rollup/pull/834))

## 0.34.5

* Fix circular export ([#813](https://github.com/rollup/rollup/issues/813))

## 0.34.4

* Module render performance tweak ([#823](https://github.com/rollup/rollup/pull/823))

## 0.34.3

* Avoid infinite recursion in `Bundle.sort()` ([#800](https://github.com/rollup/rollup/pull/800))

## 0.34.2

* resolveId calls are cached now to improve incremental build
* Fixed error message recursion in plugins

## 0.34.1

* Support `paths` config ([#754](https://github.com/rollup/rollup/issues/754))
* Allow `export *` from external module, internally

## 0.34.0

* Use resolved IDs for relative imports that are also external modules, to allow `options.globals` to work with them ([#763](https://github.com/rollup/rollup/issues/763))
* Ensure reassigned exports are declared in an ES bundle, and remove empty `exports.foo;` statements ([#755](https://github.com/rollup/rollup/issues/755))
* Add newline after sourcemap comment ([#756](https://github.com/rollup/rollup/issues/756))

## 0.33.2

* Add `bundle` as second argument to `ongenerate` and `onwrite` hooks ([#773](https://github.com/rollup/rollup/pull/773))
* Warn on top-level `this` ([#770](https://github.com/rollup/rollup/issues/770))

## 0.33.1

* Fix `--no-strict` option ([#751](https://github.com/rollup/rollup/pull/751))
* Fix Windows edge case with case-sensitive paths ([#760](https://github.com/rollup/rollup/pull/760))

## 0.33.0

* Downgrade missing transformer sourcemap to a warning, not an error, and print the name of the offending plugin if possible ([#746](https://github.com/rollup/rollup/issues/746))
* Warn if same name is re-exported from two modules ([#722](https://github.com/rollup/rollup/issues/722))

## 0.32.4

* Add `ongenerate` and `onwrite` plugin hooks ([#742](https://github.com/rollup/rollup/pull/742))

## 0.32.3

* Generated correct sourcemaps with reified namespaces ([#668](https://github.com/rollup/rollup/issues/668))
* Exclude plugin helper modules from sourcemaps ([#747](https://github.com/rollup/rollup/pull/747))

## 0.32.2

* Allow `--globals` to work with `--external` or `options.external` in whatever configuration ([#743](https://github.com/rollup/rollup/issues/743))

## 0.32.1

* Preserve side-effects to default exports that coincide with used named exports ([#733](https://github.com/rollup/rollup/issues/733))
* Support `rollup -c node:pkgname` ([#736](https://github.com/rollup/rollup/issues/736))

## 0.32.0

* Deprecate `es6` format in favour of `es` ([#468](https://github.com/rollup/rollup/issues/468))
* Add correct `jsnext:main` build ([#726](https://github.com/rollup/rollup/pull/726))

## 0.31.2

* Allow `load` plugins to provide sourcemap ([#715](https://github.com/rollup/rollup/pull/715))
* Allow `sourceMapFile` in config options ([#717](https://github.com/rollup/rollup/issues/717))

## 0.31.1

* Logging for errors emitted by `rollup-watch` ([#712](https://github.com/rollup/rollup/issues/712))

## 0.31.0

* Rewrite top-level `this` as `undefined` ([#707](https://github.com/rollup/rollup/pull/707))
* Pass `options.acorn` to Acorn ([#564](https://github.com/rollup/rollup/issues/564))

## 0.30.0

* Bundle CLI ([#700](https://github.com/rollup/rollup/issues/700))
* Ensure absolute paths are normalised ([#704](https://github.com/rollup/rollup/issues/704))
* Allow `rollup --watch` to work with targets

## 0.29.1

* Merge `target` options with main options ([#701](https://github.com/rollup/rollup/issues/701))
* Update magic-string ([#690](https://github.com/rollup/rollup/issues/690))

## 0.29.0

* `rollup --watch` ([#284](https://github.com/rollup/rollup/issues/284))

## 0.28.0

* Experimental support for incremental rebuilds ([#658](https://github.com/rollup/rollup/pull/658))

## 0.27.1

* Ensure names exported from a module are not replaced with reserved words ([#696](https://github.com/rollup/rollup/pull/696))
* Revert ([#692](https://github.com/rollup/rollup/pull/692)) – resolved IDs must be strings

## 0.27.0

* Use native promises instead of `es6-promise` ([#689](https://github.com/rollup/rollup/issues/689))
* Support multiple targets in config files ([#655](https://github.com/rollup/rollup/issues/655))
* Allow `resolveId` plugin functions to return non-strings ([#692](https://github.com/rollup/rollup/pull/692))

## 0.26.7

* Distinguish between default and namespace imports of external module ([#637](https://github.com/rollup/rollup/issues/637))
* Add `__esModule` property to named exports in AMD, CJS and UMD modes ([#650](https://github.com/rollup/rollup/issues/650))

## 0.26.6

* Deconflict named imports from external modules in ES bundles ([#659](https://github.com/rollup/rollup/issues/659))
* Support `options.preferConst` to generate `const` declarations for exports rather than `var` declarations ([#653](https://github.com/rollup/rollup/issues/653))

## 0.26.5

* Preserve `debugger` statements ([#664](https://github.com/rollup/rollup/issues/664))
* Allow `options.external` to be a function ([#522](https://github.com/rollup/rollup/issues/522))

## 0.26.4

* Prevent plugin-provided external IDs being normalised ([#630](https://github.com/rollup/rollup/issues/630), [#633](https://github.com/rollup/rollup/issues/633))
* Throw if module exports/re-exports the same name twice, or has multiple default exports ([#679](https://github.com/rollup/rollup/issues/679))
* Warn about `eval` security issue ([#675]((https://github.com/rollup/rollup/issues/675)))


## 0.26.3

* Ensure reference is not incorrectly marked as a reassignment ([#648](https://github.com/rollup/rollup/issues/648))

## 0.26.2

* Sanity check output of `load` hook ([#607](https://github.com/rollup/rollup/issues/607))
* Correct scoping for ID class expressions ([#626](https://github.com/rollup/rollup/issues/626))
* Warn if named and default exports are used together in auto mode ([#587](https://github.com/rollup/rollup/issues/587))
* Allow variable initialisers to be rewritten if necessary ([#632](https://github.com/rollup/rollup/issues/632))
* Prevent double `var` with no-treeshake option ([#639](https://github.com/rollup/rollup/pull/639))

## 0.26.1

* Add `treeshake: false`/`--no-treeshake` option for debugging ([#505](https://github.com/rollup/rollup/issues/505))
* Update build process to use Bublé ([#620](https://github.com/rollup/rollup/pull/620))

## 0.26.0

* Add `noConflict`/`--no-conflict` option for UMD builds ([#580](https://github.com/rollup/rollup/pull/580))
* Normalise relative external paths ([#591](https://github.com/rollup/rollup/pull/591))
* Report files causing transform errors ([#609](https://github.com/rollup/rollup/pull/609))
* Handle sourcemap segments with a single member ([#619](https://github.com/rollup/rollup/pull/619))
* Update dependencies

## 0.25.8

* Unixize entry path ([#586](https://github.com/rollup/rollup/pull/586))

## 0.25.7

* Expand deshadowed shorthand properties ([#575](https://github.com/rollup/rollup/issues/575))
* Allow external files to be non-existent ([#532](https://github.com/rollup/rollup/issues/532))

## 0.25.6

* Fix a regression introduced by #566 ([#569](https://github.com/rollup/rollup/issues/569))
* Prune dead conditional expressions more carefully ([#567](https://github.com/rollup/rollup/issues/567))

## 0.25.5

* Make sure shorthand destructuring assignments don't break ([#528](https://github.com/rollup/rollup/issues/528))
* Allow 'exports' key ([#542](https://github.com/rollup/rollup/issues/542))
* Ensure `foo.  bar` where `foo` is a namespace import is rewritten correctly ([#566](https://github.com/rollup/rollup/issues/566))
* Fix an edge case for exported globals (e.g. `export { document }`) ([#562](https://github.com/rollup/rollup/issues/562))

## 0.25.4

* Fix misnamed exports of default imports in ES bundles ([#513](https://github.com/rollup/rollup/issues/513))
* CLI: warn on missing config ([#515](https://github.com/rollup/rollup/pull/515))
* Detect side-effects in non-top-level member expression assignment ([#476](https://github.com/rollup/rollup/issues/476))
* Don't remove computed property class keys ([#504](https://github.com/rollup/rollup/issues/504))
* Augment existing global object rather than replacing ([#493](https://github.com/rollup/rollup/issues/493))
* Don't fail on `export {}`, warn instead ([#486](https://github.com/rollup/rollup/issues/486))

## 0.25.3

* Handle non-objects and `null` in `_interopDefault` ([#474](https://github.com/rollup/rollup/issues/474))

## 0.25.2

* Skip dead branches of a conditional expression (#[465](https://github.com/rollup/rollup/pull/465))
* Allow globals to be exported ([#472](https://github.com/rollup/rollup/pull/472))
* Ensure reassigned exports are exported ([#484](https://github.com/rollup/rollup/issues/484))

## 0.25.1

* Throw error if namespace is called ([#446](https://github.com/rollup/rollup/issues/446))
* Prevent shadowing bug in ES6 output ([#441](https://github.com/rollup/rollup/pull/441))
* Prevent `var exports.foo` ([#426](https://github.com/rollup/rollup/issues/426))
* Prevent double export of aliased symbols ([#438](https://github.com/rollup/rollup/issues/438))
* Provide more informative error if Rollup is used in-browser without appropriate `resolveId`/`load` hooks ([#275](https://github.com/rollup/rollup/issues/275))
* Use `_interopDefault` function to DRY out code with many external dependencies, in CommonJS output ([#458](https://github.com/rollup/rollup/pull/458))

## 0.25.0

* **breaking** Module order is determined according to spec, rather than in a way designed to prevent runtime errors. Rollup will warn if it detects runtime errors are likely ([#435](https://github.com/rollup/rollup/issues/435))
* Prevent overly aggressive tree-shaking with complex call expressions ([#440](https://github.com/rollup/rollup/issues/440))

## 0.24.1

* Handle calls to default exports other that are not function expressions or references to function declarations ([#421](https://github.com/rollup/rollup/issues/421))
* Ensure namespace blocks are created for chained imports ([#430](https://github.com/rollup/rollup/issues/430))
* Include references in computed property keys ([#434](https://github.com/rollup/rollup/issues/434))
* Use CLI `--external` option correctly ([#417](https://github.com/rollup/rollup/pull/417))
* Allow relative imports to be treated as external, if absolute paths are provided in `options.external` ([#410](https://github.com/rollup/rollup/issues/410))
* Make IIFE output adhere to Crockford style ([#415](https://github.com/rollup/rollup/pull/415))

## 0.24.0

* No longer attempts to resolve IDs in `options.external` ([#407](https://github.com/rollup/rollup/issues/407))
* Fix broken sourcemap resolution in cases where some modules are transformed and others aren't ([#404](https://github.com/rollup/rollup/issues/404))

## 0.23.2

* Ensure `dest` or `sourceMapFile` is resolved against CWD for purposes of sourcemap generation ([#344](https://github.com/rollup/rollup/issues/344))
* Support `banner`, `footer`, `intro` and `outro` options via CLI ([#330](https://github.com/rollup/rollup/issues/330))
* Allow `options.global` to be a function rather than an object, and warn on missing names ([#293](https://github.com/rollup/rollup/issues/293))
* Ensure side-effects are captured in cyclical call expressions ([#397](https://github.com/rollup/rollup/issues/397))
* Fix parse error with body-less arrow function expressions ([#403](https://github.com/rollup/rollup/issues/403))

## 0.23.1

* Reinstate missing fix from ([#392](https://github.com/rollup/rollup/pull/392))

## 0.23.0

* Add `bundleTransform` plugin hook and option ([#387](https://github.com/rollup/rollup/pull/387))
* Correctly store names in sourcemaps, regardless of transformers
* Add `--environment` option to CLI ([#388](https://github.com/rollup/rollup/pull/388))
* Handle destructuring in exports ([#374](https://github.com/rollup/rollup/issues/374))
* Fix UMD global exports bug introduced in 0.22.1 ([#392](https://github.com/rollup/rollup/pull/392))

## 0.22.2

* Prevent lost `var` keywords ([#390](https://github.com/rollup/rollup/issues/390))

## 0.22.1

* Update expected option keys ([#379](https://github.com/rollup/rollup/issues/379))
* Handle transformers that return stringified sourcemaps ([#377](https://github.com/rollup/rollup/issues/377))
* Automatically create missing namespaces if `moduleName` contains dots ([#378](https://github.com/rollup/rollup/issues/378))
* Ignore external dependency warnings coming from config file ([#333](https://github.com/rollup/rollup/issues/333))
* Update to latest magic-string for performance boost

## 0.22.0

* Duplicate warnings are squelched ([#362](https://github.com/rollup/rollup/issues/362))
* Plugins can manipulate or override the `options` object ([#371](https://github.com/rollup/rollup/pull/371))

## 0.21.3

* Validate option keys ([#348](https://github.com/rollup/rollup/pull/348))
* Allow namespaces imports to sit alongside named imports ([#355](https://github.com/rollup/rollup/issues/355))
* Count references inside destructured objects ([#364](https://github.com/rollup/rollup/issues/364))
* Preserve top-level `delete` statements ([#352](https://github.com/rollup/rollup/issues/352))

## 0.21.2

* Missing relative imports are an error, not a warning ([#321](https://github.com/rollup/rollup/issues/321))
* Fixed incorrectly renamed default exports in ES6 bundles ([#339](https://github.com/rollup/rollup/issues/339))
* Fixed infinite recursion bug ([#341](https://github.com/rollup/rollup/issues/341))

## 0.21.1

* Remove `aggressive: true` (was too aggressive) ([#309](https://github.com/rollup/rollup/pull/309))
* Handle top-level block statements ([#326](https://github.com/rollup/rollup/issues/326))
* Optimise namespaces with default exports ([#314](https://github.com/rollup/rollup/issues/314))

## 0.21.0

* Only include statements whose side-effects are relevant (i.e. contribute to exports or affect global state) ([#253](https://github.com/rollup/rollup/pull/253)) ([#253](https://github.com/rollup/rollup/pull/253))
* Exclude dead branches from analysis and inclusion ([#249](https://github.com/rollup/rollup/pull/249))
* Add `aggressive: true` option to eliminate all side-effects outside entry module
* More informative error when re-exporting non-existent binding ([#274](https://github.com/rollup/rollup/issues/274))
* Fix infinite recursion bug ([#291](https://github.com/rollup/rollup/issues/291))
* Log errors when using `rollup --config` ([#288](https://github.com/rollup/rollup/pull/288))
* Return rejected promises on startup instead of throwing error, if options are invalid ([#303](https://github.com/rollup/rollup/pull/303))

## 0.20.5

* Ensure re-exports don't create a local binding ([#270](https://github.com/rollup/rollup/pull/270))

## 0.20.4

* Check file exists at resolve time, to allow filenames with non-extension dots in them ([#250](https://github.com/rollup/rollup/pull/250))
* Import `Promise` where used, for Node 0.10 support ([#254](https://github.com/rollup/rollup/issues/254))
* Allow asynchronous transformer plugins ([#260](https://github.com/rollup/rollup/issues/260))
* Don't assume re-exported bindings are globals when deconflicting ([#267](https://github.com/rollup/rollup/issues/267))


## 0.20.3

* Fix bug where multiple `export *` declarations caused error ([#244](https://github.com/rollup/rollup/pulls/244))
* Missing namespace exports are a warning, not an error ([#244](https://github.com/rollup/rollup/pulls/244))
* Plugins can provide `banner` and `footer` options (string, or function that returns a string) ([#235](https://github.com/rollup/rollup/issues/235))
* Warn on encountering `eval` ([#186](https://github.com/rollup/rollup/issues/186))

## 0.20.2

* Handle errors in build config file
* More robust deconflicting, in cases where e.g. `foo$1` already exists
* Use Rollup CLI for own build process

## 0.20.1

* Support `--config` file to enable plugins with CLI ([#226](https://github.com/rollup/rollup/pulls/226))
* Prevent `default` being used as variable name ([#215](https://github.com/rollup/rollup/issues/215))
* Update deps

## 0.20.0

* Support for [plugins](https://github.com/rollup/rollup/wiki/Plugins) ([#207](https://github.com/rollup/rollup/pulls/207))
* BREAKING – `options.transform`, `options.load`, `options.resolveId`, `options.resolveExternal` and `options.external` are no longer supported, and should be handled by plugins. [More info](https://github.com/rollup/rollup/wiki/Plugins)
* BREAKING – the .js extension is only added if it looks like there's no extension, allowing e.g. `import data from 'data.json'` (with the appropriate transformer). For safety, always include the file extension – import `./foo.js`, not `./foo`

## 0.19.2

* Fix exporting namespaces to include all of their exports ([#204](https://github.com/rollup/rollup/issues/204))
* Namespace exotic objects are frozen to ensure that its properties cannot be modified, reconfigured, redefined or deleted ([#203](https://github.com/rollup/rollup/pulls/203))
* Fix `ReferenceError: Promise is not defined` in node v0.10 ([#189](https://github.com/rollup/rollup/issues/189))

## 0.19.1

* Fix `module.basename()` when used with custom `resolveId` function
* Use [rollup-babel](https://github.com/rollup/rollup-babel) to build self
* Exposed the version string through the API: `require( 'rollup' ).VERSION`

## 0.19.0

* **breaking** The `transform` option is no longer passed through to custom loaders. Loaders should only concern themselves with providing source code; transformation will *always* take place
* `options.transform` functions can return a string, or a `{code, map, ast}` object. Where possible, sourcemap chains will be flattened ([#175](https://github.com/rollup/rollup/pull/175))
* `options.resolveId`, `options.resolveExternal` and `options.load` can each be a function or an array of functions. If an array, the first non-null/undefined return value is used. In both cases, failed resolution/loading will fall back to the defaults, unless an error is thrown. ([#174](https://github.com/rollup/rollup/pull/174))
* New `intro` and `outro` options – similar to `banner` and `footer` except inserted *inside* any format-specific wrapper
* Multiple var declarations in an export block (e.g. `export let a = 1, b = 2`) are split up to facilitate tree-shaking ([#171](https://github.com/rollup/rollup/issues/171))
* More informative error when using a missing namespace property  ([#169](https://github.com/rollup/rollup/pull/169))
* Update various dependencies

## 0.18.5

* Allow namespaces to be assigned to variables ([#168](https://github.com/rollup/rollup/issues/168))
* Promote `chalk` and `source-map-support` to `dependencies`, as they're used by the CLI ([#167](https://github.com/rollup/rollup/pull/167))

## 0.18.4

* Make external modules configurable (i.e. `external.config.foo = 'bar'`) without erroring

## 0.18.3

* Crop indent exclusion ranges to exclude enclosing quotes ([#166](https://github.com/rollup/rollup/issues/166))

## 0.18.2

* Include definitions of namespace members that are exported as defaults

## 0.18.1

* Include `acorn.parse` in bundle, remove `sander` from dependencies, simplify build

## 0.18.0

* Internal rewrite
* Reinstate statically-analysable namespace imports
* Avoid using getters in namespace blocks where possible ([#144](https://github.com/rollup/rollup/issues/144))
* Track variable aliases ([#96](https://github.com/rollup/rollup/issues/96))
* Prevent multiline strings being indented ([#164](https://github.com/rollup/rollup/issues/164))

## 0.17.4

* Allow imports from hidden directories (replay of [#133](https://github.com/rollup/rollup/issues/133))

## 0.17.3

* Handle parenthesised default exports ([#136](https://github.com/rollup/rollup/issues/136))

## 0.17.2

* Allow use of scoped npm packages ([#131](https://github.com/rollup/rollup/issues/131))

## 0.17.1

* Allow namespaces to be passed to a function ([#149](https://github.com/rollup/rollup/issues/149))

## 0.17.0

* Roll back to 0.15.0 and reapply subsequent fixes pending resolution of ([#132](https://github.com/rollup/rollup/issues/132)) and related issues

## 0.16.4

* Fix import paths with `.` ([#133](https://github.com/rollup/rollup/issues/133))
* Prevent sourceMappingURL confusion leading to broken sourcemap
* Add code coverage reporting [#130](https://github.com/rollup/rollup/pull/130))
* Add `modules` property to user-facing `bundle` – an array with `{id}` objects ([#128](https://github.com/rollup/rollup/issues/128))

## 0.16.3

* Prevent adjacent blocks of multiple var declarations causing magic-string failure ([#105](https://github.com/rollup/rollup/issues/105))

## 0.16.2

* Top-level function calls and assignments to globals are treated as side-effects, and always included
* Import files from subdirectories of external packages, e.g. `import mod from 'foo/sub/mod'` ([#126](https://github.com/rollup/rollup/issues/126))

## 0.16.1

* Handle assignment patterns, and destructured/rest parameters, when analysing scopes
* Fix bug preventing project from self-building (make base `Identifier` class markable)

## 0.16.0

* Internal refactoring ([#99](https://github.com/rollup/rollup/pull/99))
* Optimisation for statically-analysable namespace imports ([#99](https://github.com/rollup/rollup/pull/99))
* Windows support (theoretically!) ([#117](https://github.com/rollup/rollup/pull/117) / [#119](https://github.com/rollup/rollup/pull/119))

## 0.15.0

* Load all modules specified by `import` statements, and do tree-shaking synchronously once loading is complete. This results in simpler and faster code, and enables future improvements ([#97](https://github.com/rollup/rollup/pull/97))
* Only rewrite `foo` as `exports.foo` when it makes sense to ([#92](https://github.com/rollup/rollup/issues/92))
* Fix bug with shadowed variables that are eventually exported ([#91](https://github.com/rollup/rollup/issues/91))
* Exclude unused function declarations that happen to modify a used name ([#90](https://github.com/rollup/rollup/pull/90))
* Simplify internal `Scope` model – scopes always attach to blocks, never function expressions/declarations

## 0.14.1

* `export { name } from './other'` does not create a local binding ([#16](https://github.com/rollup/rollup/issues/16))
* A single binding can be exported under multiple names ([#18](https://github.com/rollup/rollup/issues/18))
* `useStrict` option exposed to CLI as `--strict`/`--no-strict` ([#81](https://github.com/rollup/rollup/issues/81))
* Neater exports from ES6 bundles

## 0.14.0

* Internal refactoring
* Correctly deconflict generated default export names ([#72](https://github.com/rollup/rollup/issues/72))
* Handle `export { x } from 'y'` declarations ([#74](https://github.com/rollup/rollup/issues/74))
* Dedupe named imports from external modules in ES6 bundles ([#77](https://github.com/rollup/rollup/issues/77))

## 0.13.0

* Support `banner` and `footer` options ([#66](https://github.com/rollup/rollup/pull/66))
* Remove pre-existing sourcemap comments ([#66](https://github.com/rollup/rollup/pull/66))
* Deconflict external imports ([#66](https://github.com/rollup/rollup/pull/66))
* Use existing AST, if provided ([#66](https://github.com/rollup/rollup/pull/66))
* Rename internal namespace exports as appropriate ([#66](https://github.com/rollup/rollup/pull/66))
* Remove uninitialised var declarations that get exported ([#66](https://github.com/rollup/rollup/pull/66))
* Rename variables named `exports` to avoid conflicts ([#66](https://github.com/rollup/rollup/pull/66))

## 0.12.1

* Don't attempt to mark statements belonging to external modules ([#68](https://github.com/rollup/rollup/issues/68))
* Correctly deshadow variables that conflict with imports ([#68](https://github.com/rollup/rollup/issues/68))

## 0.12.0

* Internal re-architecting, resulting in more efficient bundling with reduced memory usage
* Shorthand properties are expanded if necessary ([#61](https://github.com/rollup/rollup/issues/61))
* Fixed various bugs with bundle external dependencies, particularly when generating ES6 bundles ([#59](https://github.com/rollup/rollup/issues/59))
* Add `--globals` option to CLI ([#60](https://github.com/rollup/rollup/pull/60))
* Allow imports of external modules for side-effects ([#55](https://github.com/rollup/rollup/pull/55))
* Prevent Rollup hanging on non-existent external module ([#54](https://github.com/rollup/rollup/pull/54))

## 0.11.4

* Side-effect preservation applies to internal default exports ([#43](https://github.com/rollup/rollup/issues/43))

## 0.11.3

* Class methods are not incorrectly renamed ([#42](https://github.com/rollup/rollup/issues/42))
* External modules are assigned names before canonical names are determined ([#42](https://github.com/rollup/rollup/issues/42))

## 0.11.2

* Correctly handle computed properties (e.g. `foo[bar]`) when discovering dependencies ([#47](https://github.com/rollup/rollup/pull/47))

## 0.11.1

* Support for `export * from '..'` ([#46](https://github.com/rollup/rollup/pull/46))

## 0.11.0

* Experimental browser-friendly build (`dist/rollup.browser.js`) ([#25](https://github.com/rollup/rollup/issues/25))
* Internal re-architecting to make discovery process simpler and more performant
* Preservation of side-effects that happen in a separate module to the affected definition ([#39](https://github.com/rollup/rollup/issues/39))

## 0.10.0

* Better sorting algorithm – sorting happens at the module level, rather than the statement level. This avoids certain edge cases
* IIFEs are ignored for the purposes of distinguishing between 'strong' and 'weak' dependencies
* Empty `var` declarations for exported bindings are omitted

## 0.9.1

* Much faster statement insertion (fixes major 0.9.0 performance regression)

## 0.9.0

* BREAKING - `resolvePath` is now `resolveId`. The returned `id` (which by default is a filepath) is passed to the `load` function, which can optionally be overridden, and which is applied to all modules including the entry module. This allows custom resolver and loading logic for integration with third party systems (e.g. JSPM) or, eventually, in-browser usage ([#30](https://github.com/rollup/rollup/issues/30))
* A statement cannot appear after later statements from the same bundle ([#34](https://github.com/rollup/rollup/issues/34))
* Tricky cyclical dependencies are handled ([#36](https://github.com/rollup/rollup/issues/36))
* `sourcemap` option is used by CLI (was omitted previously)

## 0.8.3

* Correctly rename functions that have arguments with the same name ([#32](https://github.com/rollup/rollup/issues/32))
* Ensure unused default exports are given a legal name ([#33](https://github.com/rollup/rollup/issues/33))

## 0.8.2

* Support `moduleId` and `moduleName` via CLI ([#24](https://github.com/rollup/rollup/issues/24))

## 0.8.1

* Anonymous functions that are exported as default are converted to named function declarations for correct hoisting, rather than being bound to functions ([#29](https://github.com/rollup/rollup/issues/29))
* Automatically-generated default export names are deconflicted with local definitions ([#29](https://github.com/rollup/rollup/issues/29))

## 0.8.0

* Top-level variable declarations with multiple declarators are split up, to avoid unnecessary code importing and incorrectly-ordered statements ([#26](https://github.com/rollup/rollup/issues/26))
* `this` at the top level is `undefined` ([#28](https://github.com/rollup/rollup/issues/28))

## 0.7.8

* Avoid using `path.parse` - unsupported in node 0.10

## 0.7.7

* Promise `source-map-support` from `devDependencies` to `dependencies` ([#23](https://github.com/rollup/rollup/issues/23))

## 0.7.6

* Better placement of `export default` statements ([#21](https://github.com/rollup/rollup/issues/21))
* Prevent function calls and property assignments from being treated as rebinding for sake of unbound default exports
* Add `--external foo,bar,baz` option to CLI (equivalent to `external: ['foo', 'bar', 'baz']`)
* Add CLI tests

## 0.7.5

* Prevent accidental conflicts with the global namespace ([#20](https://github.com/rollup/rollup/issues/20))

## 0.7.4

* More precise statement re-ordering to satisfy `export default` constraint (fixes bug introduced in 0.7.3)

## 0.7.3

* Default exports are not bound. To enable this, statements within a module are sorted to retain their original order ([#15](https://github.com/rollup/rollup/issues/15))
* Better positioning of comments ([#14](https://github.com/rollup/rollup/issues/14))
* Various fixes to get Travis-CI rigged up

## 0.7.2

* Fix sourcemap paths on Windows ([#6](https://github.com/rollup/rollup/pull/6))

## 0.7.1

* Named functions can be used as default exports from a bundle
* Method calls are assumed to mutate the owner (i.e. `foo.bar()` mutates `foo`) ([#13](https://github.com/rollup/rollup/issues/13))
* `options.indent` can be used to control indentation of resulting bundle. `options.true` (default) means 'auto', `options.false` means empty string. Alternatively specify whitespace e.g. `'  '` or `'\t'` ([#5](https://github.com/rollup/rollup/issues/5))

## 0.7.0

* Ensure statements are always separated by a newline ([#9](https://github.com/rollup/rollup/pull/9))
* Use CommonJS `exports` correctly (UMD exports)
* Throw error if `moduleName` is required but missing (UMD exports)
* Attach IIFE global to `this` rather than `window`
* Allow names inside bundle to the the names of `Object.prototype` properties ([#12](https://github.com/rollup/rollup/pull/12))
* Keep exports live ([#11](https://github.com/rollup/rollup/pull/11))

## 0.6.5

* Add sourceMappingURL comment to code, as appropriate
* Higher resolution sourcemaps

## 0.6.4

* Fix CJS bundling with default export

## 0.6.3

* Fix exports and external module imports with some output formats
* Fix endless cycle bug on Windows ([#3](https://github.com/rollup/rollup/pull/3)) - thanks @Bobris

## 0.6.2

* Permit assignments to properties of imported bindings

## 0.6.1

* Support for basic transformers

## 0.6.0

* BREAKING - `rollup.rollup` and `bundle.write` both take a single options argument
* BREAKING - external modules must be declared upfront with `options.external: [...]`
* Non-relative module paths will be resolved by looking for `jsnext:main` fields in the appropriate `package.json` files. This behaviour can be overridden by passing an alternative `resolveExternal` function
* Fix sourcemap options
* Include CLI files in npm package (duh)

## 0.5.0

* Command line interface
* Sourcemap generation
* Correct behaviour with `export { x as y } from 'z'`

## 0.4.1

* More import name deconflicting

## 0.4.0

* Self-hosting! `rollup.rollup` now rolls up rollup
* Fix bug with comments inside a statement later being appended to it
* Prevent shadowing of external modules
* Rewrite computed property identifiers where necessary
* Preserve original statement order where possible
* Internal refactoring

## 0.3.1

* Saner deconflicting
* Rename namespace imports from external modules correctly

## 0.3.0

* Basic functionality present, mostly spec-compliant

## 0.2.1

* Include dist files in npm package (duh)

## 0.2.0

* First release capable of doing anything useful
* Still lots of basic functionality missing

## 0.1.0

* Initial experiment
