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babel-plugin-transform-undefined-to-void

6.8.0
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  • License MIT

Replace references to `undefined` with `void 0`

Package Exports

  • babel-plugin-transform-undefined-to-void

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-undefined-to-void) 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-undefined-to-void

Some JavaScript implementations allow undefined to be overwritten, this may lead to peculiar bugs that are extremely hard to track down.

This plugin transforms undefined into void 0 which returns undefined regardless of if it's been reassigned.

Example

In

foo === undefined;

Out

foo === void 0;

Installation

$ npm install babel-plugin-transform-undefined-to-void

Usage

.babelrc

{
  "plugins": ["transform-undefined-to-void"]
}

Via CLI

$ babel --plugins transform-undefined-to-void script.js

Via Node API

require("babel-core").transform("code", {
  plugins: ["transform-undefined-to-void"]
});