babel-plugin-minify-dead-code-elimination-while-loop-fixed

0.3.1 verified Sat Apr 25 auth: no javascript

A forked and fixed version of babel-plugin-minify-dead-code-elimination from Babel minify 0.3.x. It inlines bindings, evaluates expressions, and removes unreachable code. This plugin specifically addresses a bug related to while loops (issue #11343). Current stable version: 0.3.1. No regular release cadence; maintained sporadically. Key differentiator: fixes a specific loop elimination bug not present in the original plugin.

Common errors

error Error: Cannot find module 'babel-plugin-minify-dead-code-elimination-while-loop-fixed' ↓

cause Plugin not installed or typo in module name.

fix

Run npm install babel-plugin-minify-dead-code-elimination-while-loop-fixed --save-dev

error TypeError: The plugin "minify-dead-code-elimination-while-loop-fixed" didn't return a function. ↓

cause Using ESM import instead of require(). The plugin exports via module.exports.

fix

Use require() in Node.js or configure Babel with the string plugin name in .babelrc.

error Error: .babelrc: plugins[0] must be a string or an array of [string, options] ↓

cause Options not nested correctly in an array.

fix

Use [["minify-dead-code-elimination-while-loop-fixed", { ... }]] syntax.

Warnings

breaking Plugin uses deprecated babel-core API (babel.transform). May not work with Babel 7+. ↓

fix Upgrade to @babel/core and use @babel/plugin-transform-modules-commonjs or similar. Alternatively, stick with Babel 6.

gotcha Plugin only works as a Babel plugin; it cannot be used standalone. ↓

fix Ensure Babel is installed and the plugin is declared in the Babel configuration.

gotcha Options must be nested correctly: [["minify-dead-code-elimination-while-loop-fixed", options]]. ↓

fix Use the correct array nesting pattern shown in the documentation.

deprecated The original babel-plugin-minify-dead-code-elimination is deprecated in favor of babel-preset-minify. ↓

fix Consider using babel-preset-minify for a comprehensive minification setup.

Install

npm install babel-plugin-minify-dead-code-elimination-while-loop-fixed

yarn add babel-plugin-minify-dead-code-elimination-while-loop-fixed

pnpm add babel-plugin-minify-dead-code-elimination-while-loop-fixed

Imports

default

wrong

import plugin from 'babel-plugin-minify-dead-code-elimination-while-loop-fixed'

correct

module.exports = require('babel-plugin-minify-dead-code-elimination-while-loop-fixed')

This package is a CommonJS plugin. Use require() for Node.js/Babel config. ESM import is not supported.

function

wrong

{
  "plugins": ["babel-plugin-minify-dead-code-elimination-while-loop-fixed"]
}

correct

{
  "plugins": ["minify-dead-code-elimination-while-loop-fixed"]
}

In .babelrc or babel.config.js, omit the 'babel-plugin-' prefix. Use the short name.

options

wrong

{
  "plugins": ["minify-dead-code-elimination-while-loop-fixed", { "keepFnName": true }]
}

correct

{
  "plugins": [["minify-dead-code-elimination-while-loop-fixed", { "keepFnName": true }]]
}

When passing options, the plugin must be specified as an array inside another array. Missing the inner array will cause options to be ignored.

Quickstart

Shows how to install and configure the plugin in .babelrc, and the effect of dead code elimination.

// Install the plugin
// npm install babel-plugin-minify-dead-code-elimination-while-loop-fixed

// .babelrc example
{
  "presets": ["@babel/preset-env"],
  "plugins": ["minify-dead-code-elimination-while-loop-fixed"]
}

// Input code
function foo() { var x = 1; }
function bar() { var x = f(); }
function baz() {
  var x = 1;
  console.log(x);
  function unused() { return 5; }
}

// After transformation (output)
// function foo() {}
// function bar() { f(); }
// function baz() {
//   console.log(1);
// }