Guide on connecting a type to a library for widespread access in Typescript

Currently, I am loading a JS library in the traditional way (using loadScript, <script> in DOM, etc.), and I have the type definitions available. However, I am struggling to inform Typescript that window.myLibrary is the constructor for my library and should match the existing type.

If only there was a way to import both the dependency and type definitions simultaneously...

import { MyLibrary } from "myLibrary";


[..]


new MyLibrary("#div", {});

This approach is too modern for my current setup. All I want to do is import the type definitions using Webpack and link them to a window['myLibrary'] variable while still being able to leverage the benefits of Typescript's typing system.

typescriptwebpacktypescript-typings

Answer №1

Learn how to connect the type to the library instance here

// Bring in the typings directly
import { MyLibrary } from "../../../../../defs/myLib-4.5";

[...]

// The crucial line that links the type to the window attribute
const GlobalLibraryConstructor = (window as any)['myLibrary'] as typeof MyLibrary;
this.table = new GlobalLibraryConstructor("#div", {});

I hope this explanation proves helpful!

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