babel-plugin-undefined-to-void

Replace references to `undefined` with `void 0`

Downloads in past

Stats

StarsIssuesVersionUpdatedCreatedSize
babel-plugin-undefined-to-void
1.1.68 years ago8 years agoMinified + gzip package size for babel-plugin-undefined-to-void in KB

Readme

babel-plugin-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-undefined-to-void

Usage

Via .babelrc (Recommended)

.babelrc
{
  "plugins": ["undefined-to-void"]
}

Via CLI

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

Via Node API

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