@babel/plugin-transform-duplicate-keys
info
This plugin is included in @babel/preset-env
This plugin actually converts duplicate keys in objects to be computed properties, which then must be handled by the @babel/plugin-transform-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 ={
geta(){},
seta(x){},
a:3,
};
Out
JavaScript
var x ={a:5,["a"]:6};
var y ={
geta(){},
seta(x){},
["a"]:3,
};
Installation
- npm
- Yarn
- pnpm
- Bun
npm install --save-dev @babel/plugin-transform-duplicate-keys
yarn add --dev @babel/plugin-transform-duplicate-keys
pnpm add --save-dev @babel/plugin-transform-duplicate-keys
bun add --dev @babel/plugin-transform-duplicate-keys
Usage
With a configuration file (Recommended)
babel.config.json
{
"plugins":["@babel/plugin-transform-duplicate-keys"]
}
Via CLI
Shell
babel --plugins @babel/plugin-transform-duplicate-keys script.js
Via Node API
JavaScript
require("@babel/core").transformSync("code",{
plugins:["@babel/plugin-transform-duplicate-keys"],
});