ES2015 duplicate keys transform

Compile objects with duplicate keys to valid strict ES5.

This plugin actually converts duplicate keys in objects to be computed properties, which then must be handled by the transform-es2015-computed-properties plugin. The final result won’t contain any object literals with duplicate keys.

Example

In

var x = { a: 5, a: 6 };
var y = {
  get a() {},
  set a(x) {},
  a: 3
};

Out

var x = { a: 5, ["a"]: 6 };
var y = {
  get a() {},
  set a(x) {},
  ["a"]: 3
};

Installation

npm install --save-dev babel-plugin-transform-es2015-duplicate-keys

Usage

Via .babelrc (Recommended)

.babelrc

{
  "plugins": ["transform-es2015-duplicate-keys"]
}

Via CLI

babel --plugins transform-es2015-duplicate-keys script.js

Via Node API

require("babel-core").transform("code", {
  plugins: ["transform-es2015-duplicate-keys"]
});