How can I integrate JavaScript modules with TypeScript?

How can I integrate JavaScript modules with TypeScript?

You can integrate JavaScript modules with TypeScript by using the import and export syntax. Make sure to set the module option in your tsconfig.json to a compatible module system like ES6 or CommonJS.

What if I have a JavaScript file that I want to use in my TypeScript project?

You can simply import the JavaScript file in your TypeScript code. TypeScript will allow you to use it, but you might want to create a declaration file (.d.ts) to define the types for better type checking.

Can you give me an example of a declaration file?

Sure! If you have a JavaScript module named myModule.js, you can create a myModule.d.ts file like this:

declare module 'myModule' {
  export function myFunction(param: string): number;
}

Is there a way to automatically generate declaration files?

Yes, you can use the TypeScript compiler with the --declaration flag to automatically generate declaration files for your TypeScript code.