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

Usage

.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).