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Compile objects with duplicate keys to valid strict ES5

Package Exports

  • babel-plugin-transform-es2015-duplicate-keys

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-transform-es2015-duplicate-keys) 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-transform-es2015-duplicate-keys

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

.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"]
});