babel-plugin-module-name-mapper

Babel Component Resolver Plugin

This plugin adds Jest moduleNameMapper option as a babel plugin with special support for monorepos, (which is lacking for now in Jest).

Usage

Allow you to drop relative path usage for prefixed paths.

// Instead of:
import fooHelper from './../../../helpers/foo.js';
// You can write:
import fooHelper from 'src/helpers/example.js';

// No more relative path hell 🎉

Quickstart

yarn add --dev babel-plugin-module-name-mapper

• Add the plugin to your .babel.config.js (or .babelrc)

module.exports = {
  presets: [['@babel/preset-env']],
  plugins: [
    [
      'babel-plugin-module-name-mapper',
      {
        moduleNameMapper: {
          '^src/(.*)': '<rootDir>/src/$1',
          underscore: 'lodash'
        }
      }
    ]
  ]
};

Available scripts

Script	Description
start	Alias of test:watch
test	Run jest unit tests
test:watch	Run and watch jest unit tests
lint	Run eslint static tests
build	Compile the library
build:watch	Compile and watch the library

Authors

Olivier Louvignes

• http://olouv.com
• http://github.com/mgcrea

Implementation inspired by babel-plugin-module-resolver by @tleunen

License

The MIT License

Copyright (c) 2019 Olivier Louvignes

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
THE SOFTWARE.