babel-plugin-transform-undefined-to-void
This plugin transforms undefined
into void 0
which returns undefined regardless of if it's been reassigned.
Example
In
JavaScript
foo === undefined;
Out
JavaScript
foo === void 0;
Installation
- npm
- Yarn
- pnpm
npm install babel-plugin-transform-undefined-to-void --save-dev
yarn add babel-plugin-transform-undefined-to-void --dev
pnpm add babel-plugin-transform-undefined-to-void --save-dev
Usage
With a configuration file (Recommended)
babel.config.json
{
"plugins": ["transform-undefined-to-void"]
}
Via CLI
Shell
babel --plugins transform-undefined-to-void script.js
Via Node API
JavaScript
require("@babel/core").transformSync("code", {
plugins: ["transform-undefined-to-void"],
});