Handling *.d.ts Files for Exposing Default Constructors in TypeScript

---

If anything seems off to you, please feel free to write me at vlogize [AT] gmail [DOT] com.
---

The Problem

Imagine you have a JavaScript library that you would like to use in a TypeScript project. You want to import this library in a straightforward manner using the following syntax:

[[See Video to Reveal this Text or Code Snippet]]

or

[[See Video to Reveal this Text or Code Snippet]]

However, when you attempt to use an alternative import format:

[[See Video to Reveal this Text or Code Snippet]]

Step 1: Starting Out

[[See Video to Reveal this Text or Code Snippet]]

While this is a good beginning, it doesn’t fully implement what you need – to expose a default class constructor that TypeScript can use effectively.

Step 2: The Right Approach

Thanks to community feedback, we can finalize the correct way to structure this file. Below is the modified content to ensure proper functionality:

[[See Video to Reveal this Text or Code Snippet]]

Step 3: Analyzing the Structure

export class MyLib: This declares the class MyLib so that it can be used in TypeScript code that imports from "my-lib".

export = MyLib;: This line is crucial. It signifies that when you import the module, you're essentially receiving the MyLib class directly. This structure mimics the CommonJS module format and allows the default import syntax to work properly.

Conclusion

By following these steps, you should find it much easier to handle complex libraries and ensure your TypeScript code remains clean and functional.