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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, ...z } = { 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, ...z };
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
z = { x, ...y };
// compiled
z = 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"]
});