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- # 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](http://babeljs.io/docs/plugins/transform-es2015-computed-properties) plugin. The final result won't contain any object literals with duplicate keys.
- ## Example
- **In**
- ```javascript
- var x = { a: 5, a: 6 };
- var y = {
- get a() {},
- set a(x) {},
- a: 3
- };
- ```
- **Out**
- ```javascript
- var x = { a: 5, ["a"]: 6 };
- var y = {
- get a() {},
- set a(x) {},
- ["a"]: 3
- };
- ```
- ## Installation
- ```sh
- npm install --save-dev babel-plugin-transform-es2015-duplicate-keys
- ```
- ## Usage
- ### Via `.babelrc` (Recommended)
- **.babelrc**
- ```json
- {
- "plugins": ["transform-es2015-duplicate-keys"]
- }
- ```
- ### Via CLI
- ```sh
- babel --plugins transform-es2015-duplicate-keys script.js
- ```
- ### Via Node API
- ```javascript
- require("babel-core").transform("code", {
- plugins: ["transform-es2015-duplicate-keys"]
- });
- ```
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