mxGraph Typescript Declarations For Official mxGraph NPM Package.

1. Add mxgraph and @typed-mxgraph/typed-mxgraph dependencies to your project:

   npm:

    npm install --save mxgraph
    npm install --save-dev @typed-mxgraph/typed-mxgraph

   yarn:

   yarn add mxgraph
   yarn add --dev @typed-mxgraph/typed-mxgraph

2. Update tsconfig.json append node_modules/@typed-mxgraph to typeRoots:

   {
     "compilerOptions": {
       "target": "es5",
       "module": "commonjs",
       "esModuleInterop": true,
       "typeRoots": [
         "node_modules/@types",
         "node_modules/@typed-mxgraph"
       ]
     }
   }

3. Import mxGraph factory:

   import factory from 'mxgraph';
   
   const mx = factory({
     mxBasePath: '',
   });
   console.log(mx.mxClient.VERSION);

4. (optional) Create a helper to import mxgraph

   // src/mxgraph.ts
   import factory from 'mxgraph';
   
   declare global {
     interface Window {
       mxBasePath: string;
       mxLoadResources: boolean;
       mxForceIncludes: boolean;
       mxLoadStylesheets: boolean;
       mxResourceExtension: string;
     }
   }
   
   window.mxBasePath = 'assets/mxgraph';
   window.mxLoadResources = true;
   window.mxForceIncludes = false;
   window.mxLoadStylesheets = true;
   window.mxResourceExtension = '.txt';
   
   export default factory({
     // not working see https://github.com/jgraph/mxgraph/issues/479
     mxBasePath: 'assets/mxgraph',
   });

   // src/application.ts
   import mx from './mxgraph';                       // <- import values from factory()
   import type { mxGraph, mxGraphModel } from 'mxgraph';  // <- import types only, "import type" is a TypeScript 3.8+ syntax
   
   export class Application {
   
     constructor(container: HTMLElement) {
       if(mx.mxClient.isBrowserSupported()) {
         console.log('Yes! Yes!');
       }
   
       const graph: mxGraph = new mx.mxGraph(container);
       const model: mxGraphModel = graph.getModel();
       model.beginUpdate();
       try {
         graph.insertVertex(graph.getDefaultParent(), '', 'TEST', 0, 0, 100, 100);
       } finally {
         model.endUpdate();
       }
     }
   
   }

There a known issues is https://github.com/typed-mxgraph/typed-mxgraph/issues/50 the error message may look similar to

Uncaught TypeError: Cannot set properties of undefined (setting 'mxBasePath')

For detailed reasons, please refer to:

• https://github.com/typed-mxgraph/typed-mxgraph/issues/50#issuecomment-1114008885
• and https://github.com/typed-mxgraph/typed-mxgraph/issues/50#issuecomment-1120176914

Demos:

• https://github.com/typed-mxgraph/typed-mxgraph-example-bundled-with-rollup
• https://github.com/typed-mxgraph/typed-mxgraph-example-bundled-with-webpack

Types have been initially created from mxGraph 4.1.0 by hand (1st hosting repository was mxgraph-type-definitions) and progressively updated when new mxgraph versions have been released.

The mxgraph lib is almost fully covered by types in this project. The issues you may encounter are

• API changes in recent mxgraph have not been reported. We haven't decided how we will manage this in the future, so for now, they are updated when user detect issues
• Function arguments types or 'mandatoriness' may not be accurate: even by reading the JS code, it is sometimes hard to figure out what is the correct type.
• Historically, we try to avoid any and use optional when we don't know.
• We expect user to provide feedbacks by creating GitHub issues and/or Pull Requests when they notice issue with the types.

The definitions target mxGraph 4.2.2. See the implementation status in the following table.

• progress: initial support
  • not yet: no support at all
  • partial: implementation started, but some classes/fields/methods are missing
  • completed: all classes/fields/methods should exist (fill an issue and/or provide a Pull Request if you detect an issue) but
    • TSDoc is not fully accurate
    • some type declaration may be wrong
• checked: a finest review has been conducted about TSDoc, mxGraph types used by functions/methods, fields, ...

• converting mxGraph API documentation to TSDoc: see regexp conversion helpers

We are actively developing, if you want to be a contributor, please refer to the following links

• mxgraph-road-to-DefinitelyTyped
• https://github.com/jgraph/mxgraph/issues/81
• https://github.com/DefinitelyTyped/DefinitelyTyped/issues/5317