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babel-plugin-transform-object-rest-spread

Compile object rest and spread to ES5

babel-plugin-transform-object-rest-spread

This plugin allows Babel to transform rest properties for object destructuring assignment and spread properties for object literals.

Example

// Rest properties 
let { x, y, ...} = { x: 1, y: 2, a: 3, b: 4 };
console.log(x); // 1 
console.log(y); // 2 
console.log(z); // { a: 3, b: 4 } 
 
// Spread properties 
let n = { x, y, ...};
console.log(n); // { x: 1, y: 2, a: 3, b: 4 } 

Installation

npm install --save-dev babel-plugin-transform-object-rest-spread

Usage

Via .babelrc (Recommended)

.babelrc

{
  "plugins": ["transform-object-rest-spread"]
}

Options

This plugin will use babel's extends helper, which will polyfill Object.assign by default.

  • useBuiltIns - Do not use Babel's helper's and just transform to use the built-in method (Disabled by default).
{
  "plugins": [
    ["transform-object-rest-spread", { "useBuiltIns": true }]
  ]
}
 
// source 
= { x, ...};
// compiled 
= Object.assign({ x }, y);

Via CLI

babel --plugins transform-object-rest-spread script.js

Via Node API

require("babel-core").transform("code", {
  plugins: ["transform-object-rest-spread"]
});

References