Selected Part:
First Node's data:
Model.modelData:

An HTML-based inspector that displays and allows editing of data for the selected Part (if any), or for a particular JavaScript object, or for the shared Model.modelData object, which exists even if there are no nodes or links.

The inspector code lies in DataInspector.js. This code is meant to be a starting point for making your own model data inspector.

On browsers that support it, color types display a color picker. There are various plugins and polyfills for this functionality if you wish to extend the data inspector.

This shows the contents of the model after each transaction:

### GoJS Features in this sample

#### Groups

The Group class is used to treat a collection of Nodes and Links as if they were a single Node. Those nodes and links are members of the group; together they constitute a subgraph.

A subgraph is not another Diagram, so there is no separate HTML Div element for the subgraph of a group. All of the Parts that are members of a Group belong to the same Diagram as the Group. There can be links between member nodes and nodes outside of the group as well as links between the group itself and other nodes. There can even be links between member nodes and the containing group itself.

More information can be found in the GoJS Intro.

Related samples

#### GoJS Extensions

GoJS can be extended in a variety of ways. The most common way to change the standard behavior is to set properties on the GraphObject, Diagram, CommandHandler, Tool, or Layout. But when the desired property does not exist, you might need to override methods of CommandHandler, Tool, Layout, Link, or Node. Methods that you can override are documented in the API reference. Various features of GoJS can be overriden, either by replacing a method on an instance (a feature of JavaScript) or by defining a subclass. You should not modify the prototypes of any of the GoJS classes.

In addition to our samples, GoJS provides an extensions gallery, showcasing the creation of custom tools and layouts. Those classes and samples are written in TypeScript, available at `../extensionsJSM/`, as ECMAScript/JavaScript modules -- these use the `../release/go-module.js` library. We recommend that you copy the files that you need into your project, so that you can adjust how they refer to the GoJS library that you choose and so that you can include them into your own building and packaging procedures.

More information can be found in the GoJS Intro.

Related samples

#### Data Inspector

Using a premade GoJS extension, you can create an HTML-based inspector that displays and allows editing of data for the selected Part (if any), or for a particular JavaScript object, or for the shared Model.modelData object, which exists even if there are no nodes or links.

The inspector code lies in DataInspector.js and DataInspector.css. This code is meant to be a starting point for making your own model data inspector.

A generic demonstration of this extension can be found in the GoJS Intro.

Related samples

#### HTML Interaction

GoJS Diagrams can be used alongside other HTML elements in a webapp. For custom Text Editors, Context Menus, and ToolTips, which are invoked and hidden via GoJS tool operations, it is best to use the HTMLInfo class.

More information can be found in the GoJS Intro.

Related samples