What is the process for importing a TypeScript module exclusively through typings without having to download it separately?

Currently, I am working on a widget for a website that is already utilizing jQuery and I am using TypeScript. The goal is to embed my output into the host website while taking advantage of the existing jQuery library loaded by the host site.

In order to replicate the production environment, I have included references to the host website by including link and script tags in the header section of my HTML wrapper development code.

My initial approach to using jQuery in TypeScript was to install @types/jquery and then import it using import $ from 'jquery';. However, this method failed during compilation with the error message:

Module not found: Error: Can't resolve 'jquery' [...]

I am seeking guidance on how to inform TypeScript that jQuery is already available within my application so that it can utilize window.jQuery with type definitions.

typescript

Answer №1

One useful feature in Webpack's configuration is the externals property, which serves a specific purpose. By using this property, you can inform the bundler that a certain package does not need to be included in the bundle because it is already available in the environment.

module.exports = {
  //...
  externals: {
    react: 'React',
  },
};

To learn more about how to utilize this feature, check out the Webpack Docs.

Answer №2

Instead of using the import statement, I found a workaround by using this code:

const jQuery: JQueryStatic = window['jQuery'] as JQueryStatic;

Linda suggests configuring jQuery as an external in the webpack setup for better performance, but not all environments allow modification of webpack settings.

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