babel-plugin-minify-mangle-names

babel-plugin-minify-mangle-names

Context- and scope- aware variable renaming.

Example

In

var globalVariableName = 42;
function foo() {
  var longLocalVariableName = 1;
  if (longLocalVariableName) {
    console.log(longLocalVariableName);
  }
}

Out

var globalVariableName = 42;
function foo() {
  var a = 1;
  if (a) {
    console.log(a);
  }
}

Installation

npm install babel-plugin-minify-mangle-names --save-dev

Usage

Via .babelrc (Recommended)

.babelrc

// without options
{
  "plugins": ["minify-mangle-names"]
}

// with options
{
  "plugins": [
    ["minify-mangle-names", { "exclude": { "foo": true, "bar": true} }]
  ]
}

Via CLI

babel --plugins minify-mangle-names script.js

Via Node API

require("@babel/core").transform("code", {
  plugins: ["minify-mangle-names"]
});

Options

• exclude - A plain JS Object with keys as identifier names and values indicating whether to exclude (default: {})
• eval - mangle identifiers in scopes accessible by eval (default: false)
• keepFnName - prevent mangler from altering function names. Useful for code depending on fn.name (default: false)
• topLevel - mangle topLevel Identifiers (default: false)
• keepClassName - prevent mangler from altering class names (default: false).