Modified version of the one on MDN: https://developer.mozilla.org/en-US/docs/JavaScript/Reference/Global_Objects/Function/bind#Compatibility

Function.bind polyfill.js

// Function.bind polyfill:
open.bind||(Function.prototype.bind=function(b){function c(){return d.apply(this instanceof a&&b?this:b,e.concat([].slice.call(arguments)))}function a(){}var e=[].slice.call(arguments,1),d=this;a.prototype=this.prototype;c.prototype=new a;return c});