What is the process for adding custom text to create a .d.ts file using the TypeScript compiler?

In my endeavor to develop a javascript module using TypeScript that is compatible with ES5 browsers and NodeJs modules, I have encountered a dilemma. I wish to avoid using import and export in TypeScrtipt as it creates dependencies on SystemJS, RequireJS, or commonJs for the output. Instead, I opted to create a library with a namespace and implemented the following code to ensure compatibility with SystemJs:

// global html object (pure javascript compatiblity)
if (typeof window !="undefined") (<any>window).myNamespace = myNamespace;

// create exports
declare var module:any;
if (typeof module !="undefined") module.exports = {myNamespace};

Although this setup works fine, I now need to include additional code to utilize the library within NodeJS modules while maintaining proper typing information.

export {myNamespace}

This enables me to incorporate my library into NodeJs lib using the following syntax:

import {myNamespace} from "../lib/myNamespace.js";

However, I am struggling to find a way to instruct the TypeScript compiler to automatically append that export without creating its own module structure. Is there a method to seamlessly add custom lines at the end of the generated d.ts file after each compilation, similar to the following:

Generated typing ..
...
...

// Custom declaration
// Remark Remark
export {myNamespace}
// Remark Remark

**Note: ** The modulation is none and many aspects are customized, therefore the traditional export feature of typescript modulation cannot be employed.

Answer №1

How can I append additional lines to the end of a generated d.ts file?

There isn't a built-in TypeScript feature that allows for adding code exclusively to the generated .d.ts file without it existing in the original .ts file.

Possible Solutions

One option is to implement a build pipeline such as gulp or grunt, and utilize their completion event to add extra content after the .d.ts file has been generated.

I would advise taking a step back and reassessing why you believe this additional functionality is necessary.

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