fn-annotate Get the argument names of a JavaScript function. Install npm install --save fn-annotate Usage var annotate = require('fn-annotate'); function myFunction (user, document, db) { // do some stuff.} var argumentNames = annotate(myFunction); // [ 'user', 'document', 'db' ]console.log(argumentNames); // [ 'x' ]console.log(annotate(x => x)); // [ 'param' ]console.log(annotate(function * (param) {}));