Package Exports
- @babel/plugin-proposal-object-rest-spread
This package does not declare an exports field, so the exports above have been automatically detected and optimized by JSPM instead. If any package subpath is missing, it is recommended to post an issue to the original package (@babel/plugin-proposal-object-rest-spread) to support the "exports" field. If that is not possible, create a JSPM override to customize the exports field for this package.
Readme
@babel/plugin-proposal-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-proposal-object-rest-spreadUsage
Via .babelrc (Recommended)
.babelrc
{
"plugins": ["@babel/plugin-proposal-object-rest-spread"]
}Via CLI
babel --plugins @babel/plugin-proposal-object-rest-spread script.jsVia Node API
require("@babel/core").transform("code", {
plugins: ["@babel/plugin-proposal-object-rest-spread"]
});Options
useBuiltIns
boolean, defaults to false.
By default, this plugin uses Babel's extends helper which polyfills Object.assign. Enabling this option will use Object.assign directly.
.babelrc
{
"plugins": [
["@babel/plugin-proposal-object-rest-spread", { "useBuiltIns": true }]
]
}In
z = { x, ...y };Out
z = Object.assign({ x }, y);