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between an AMP Doc and a Viewer","homepage":"https://github.com/ampproject/amphtml/tree/master/extensions/amp-viewer-integration/0.1/messaging","keywords":["amp"],"repository":{"type":"git","url":"git+https://github.com/ampproject/amphtml.git","directory":"extensions/amp-viewer-integration/0.1/messaging"},"author":{"name":"The AMP HTML Authors"},"bugs":{"url":"https://github.com/ampproject/amphtml/issues"},"license":"Apache-2.0","readme":"# AMP Viewer Messaging\n\n[![npm version](https://badge.fury.io/js/%40ampproject%2Fviewer-messaging.svg)](https://badge.fury.io/js/%40ampproject%2Fviewer-messaging)\n\nThe AMP Viewer Messaging library allows an AMP Viewer to establish a\ncommunication channel with an AMP document.\n\nSee [Connecting AMP Viewers with AMP pages](https://github.com/ampproject/amphtml/blob/master/extensions/amp-viewer-integration/integrating-viewer-with-amp-doc-guide.md)\nfor more information.\n\n## Installation\n\nInstall via:\n\n```sh\nnpm i @ampproject/viewer-messaging\n```\n\n## Usage\n\nAssuming you have an AMP document hosted on `https://example.com/amp-document`:\n\n```js\nimport {Messaging} from '@ampproject/viewer-messaging';\n\nconst iframe = document.createElement('iframe');\niframe.setAttribute(\n 'src',\n `https://example.com/amp-document#origin=${window.location.origin}`\n);\ndocument.body.appendChild(iframe);\n\nconst messaging = await Messaging.waitForHandshakeFromDocument(\n /* source window */ window,\n /* target window */ iframe.contentWindow,\n /* target origin */ 'https://example.com'\n);\nmessaging.setDefaultHandler((name, data, rsvp) => {\n console.log(`Received message: ${name}`);\n});\n// use messaging.sendRequest(...) to make requests to the AMP document\n```\n\nNote: The AMP document needs to include the `amp-viewer-integration` script:\n\n\n```html\n\n```\n\n","readmeFilename":"README.md"}