JSFiddle - React, Tailwind, and code Playground

by vjeux

HTML

<script src="http://underscorejs.org/underscore.js"></script>

JavaScript

var lookupIterator;
var group;

_.isFunction = function() {
  lookupIterator = arguments.callee.caller;
  group = lookupIterator.caller;
};
_.groupBy();

console.log('lookupIterator', lookupIterator);
console.log('group', group);