62 lines
1.1 KiB
Markdown
62 lines
1.1 KiB
Markdown
# @babel/plugin-transform-duplicate-keys
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> Compile objects with duplicate keys to valid strict ES5.
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This plugin actually converts duplicate keys in objects to be computed properties, which then must be handled by the [@babel/plugin-transform-computed-properties](http://babeljs.io/docs/plugins/transform-computed-properties) plugin. The final result won't contain any object literals with duplicate keys.
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## Example
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**In**
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```javascript
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var x = { a: 5, a: 6 };
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var y = {
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get a() {},
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set a(x) {},
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a: 3
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};
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```
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**Out**
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```javascript
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var x = { a: 5, ["a"]: 6 };
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var y = {
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get a() {},
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set a(x) {},
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["a"]: 3
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};
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```
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## Installation
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```sh
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npm install --save-dev @babel/plugin-transform-duplicate-keys
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```
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## Usage
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### Via `.babelrc` (Recommended)
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**.babelrc**
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```json
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{
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"plugins": ["@babel/plugin-transform-duplicate-keys"]
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}
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```
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### Via CLI
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```sh
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babel --plugins @babel/plugin-transform-duplicate-keys script.js
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```
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### Via Node API
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```javascript
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require("@babel/core").transform("code", {
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plugins: ["@babel/plugin-transform-duplicate-keys"]
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});
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```
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