eslint-plugin-require-extensions

TypeScript doesn't transform extensions and doesn't enforce file extensions.

This is a simple eslint plugin that ensures that relative imports and exports have .js extensions.

Credit for the original implementation goes to johnrees. ❤️

1. Install

1npm install --save-dev eslint-plugin-require-extensions

2. Edit .eslintrc

1{
2    "extends": [
3        "plugin:require-extensions/recommended"
4    ],
5    "plugins": [
6        "require-extensions"
7    ]
8}

3. Code

1// source.js
2
3import Target from './target';

4. Lint

1eslint .

source.js
  1:1  error  Relative imports and exports must end with .js  require-extensions/require-extensions

5. Fix

1eslint --fix .

1// source.js
2
3import Target from './target.js';