babel-plugin-transform-remove-undefined
This removes rvals that are equivalent to undefined wherever possible
Last updated 7 years ago by babeljs .
MIT · Repository · Bugs · Original npm · Tarball · package.json
$ npm install babel-plugin-transform-remove-undefined 
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babel-plugin-transform-remove-undefined

For variable assignments, this removes rvals that evaluate to undefined (vars in functions only). For functions, this removes return arguments that evaluate to undefined.

Example

In

let a = void 0;
function foo() {
  var b = undefined;
  return undefined;
}

Out

let a;
function foo() {
  var b;
  return;
}

Installation

npm install babel-plugin-transform-remove-undefined --save-dev

Usage

Via .babelrc (Recommended)

.babelrc

{
  "plugins": ["babel-plugin-transform-remove-undefined"]
}

Via CLI

babel --plugins babel-plugin-transform-remove-undefined script.js

Via Node API

require("@babel/core").transform("code", {
  plugins: ["babel-plugin-transform-remove-undefined"]
});

Options

  • tdz - Detect usages before declaration/initialization in let/const(throws) and var(void 0)

Current Tags

  • 0.5.0-alpha.9                                ...           canary (6 years ago)
  • 0.5.0                                ...           latest (6 years ago)
  • 0.0.3                                ...           prerelease (8 years ago)

81 Versions

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