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

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

1. Edit .eslintrc

{
    "extends": [
        "plugin:require-extensions/recommended"
    ],
    "plugins": [
        "require-extensions"
    ]
}

1. Code

// source.js

import Target from './target';

1. Lint

eslint .

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

1. Fix

eslint --fix .

// source.js

import Target from './target.js';