Fixes the file extensions in TypeScript files so they may be loaded as ES modules.

ES Modules require imports to contain the file extension.

Currently, TypeScript doesn't add the file extensions for you. (issue) 🤞

Although, they could be added in the TS file this makes using the non-module (nodejs / mocha testing) difficult.

This simple program allows you to continue writing your TS files without the extension and will append .js to all your local imports.

This:

import Default from "no-change";
import { func } from "./local/function";
// ...

Turns into:

 *  import Default from "no-change";
 *  import { func } from "./local/function.js";
// ...

$ npm i -D tsc-esm

After you have compiled your TypeScript run it through this CLI.

$ tsc && tsc-esm index.js dist/*.js

• Do not add extension if it already exists