https://github.com/codemix/babel-plugin-closure-elimination

A Babel plugin which eliminates closures from your JavaScript wherever possible.
https://github.com/codemix/babel-plugin-closure-elimination

Last synced: about 2 months ago
JSON representation

A Babel plugin which eliminates closures from your JavaScript wherever possible.

• Host: GitHub
• URL: https://github.com/codemix/babel-plugin-closure-elimination
• Owner: codemix
• License: mit
• Created: 2015-05-11T14:08:27.000Z (over 9 years ago)
• Default Branch: master
• Last Pushed: 2022-12-11T03:00:21.000Z (almost 2 years ago)
• Last Synced: 2024-07-07T04:05:21.058Z (2 months ago)
• Language: JavaScript
• Size: 390 KB
• Stars: 369
• Watchers: 12
• Forks: 15
• Open Issues: 4
• Metadata Files:
  • Readme: README.md
  • License: LICENSE.md

Awesome Lists containing this project

• awesome-list - babel-plugin-closure-elimination
• awesome-babel - closure-elimination - Transforms closures into separate functions. (Plugins / Optimization)

README

        
# Babel Closure Elimination

This is a [Babel](https://babeljs.io/) plugin that eliminates unnecessary closures from your JavaScript in the name of performance.

[![Build Status](https://travis-ci.org/codemix/babel-plugin-closure-elimination.svg)](https://travis-ci.org/codemix/babel-plugin-closure-elimination)

> Note: Now requires Babel 6.

# What?

Turns code like this:

```js

function demo (input) {

  return input.map(item => item + 1).map(item => item + 2);

}

```

Into code like this:

```js

function _ref(item) {

  return item + 1;

}

function _ref2(item) {

  return item + 2;

}

function demo(input) {

  return input.map(_ref).map(_ref2);

}

```

# Why?

Because it's faster and more memory efficient in [most JavaScript engines](http://jsperf.com/closure-elimination), and means you can safely use arrow functions without a performance penalty in most cases.

# Installation

First, install via [npm](https://npmjs.org/package/babel-plugin-closure-elimination).

```sh

npm install --save-dev babel-plugin-closure-elimination

```

Then, in your babel configuration (usually in your `.babelrc` file), add `"closure-elimination"` to your list of plugins:

```json

{

  "plugins": ["closure-elimination"]

}

```

# License

Published by [codemix](http://codemix.com/) under a permissive MIT License, see [LICENSE.md](./LICENSE.md).