Remove anonymous function names

Option: transforms.removeAnonymousFunctionNames

What it changes

Removes a function expression’s name when its body does not reference it.

var greet = function greet() {};
var a = function bar() {};

var greet = function () {};
var a = function () {};

Run this transform by setting transforms.removeAnonymousFunctionNames to true:

obfuscate.mjs

const output = obfuscate(source, {
  transforms: {
    removeAnonymousFunctionNames: true,
  },
})

Open the TypeScript implementation on GitHub.

Review behavior checks and cases this transform leaves alone.

Last modified on August 26, 2026