diff --git a/src/polyfill.js b/src/polyfill.js index d535cc7..95d7812 100644 --- a/src/polyfill.js +++ b/src/polyfill.js @@ -1,7 +1,25 @@ -// fix problems using c3 with phantomjs #578 -Function.prototype.bind = Function.prototype.bind || function (thisp) { - var fn = this; - return function () { - return fn.apply(thisp, arguments); - }; -}; +// PhantomJS doesn't have support for Function.prototype.bind, which has caused confusion. Use +// this polyfill to avoid the confusion. +// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Function/bind#Polyfill + +if (!Function.prototype.bind) { + Function.prototype.bind = function(oThis) { + if (typeof this !== 'function') { + // closest thing possible to the ECMAScript 5 + // internal IsCallable function + throw new TypeError('Function.prototype.bind - what is trying to be bound is not callable'); + } + + var aArgs = Array.prototype.slice.call(arguments, 1), + fToBind = this, + fNOP = function() {}, + fBound = function() { + return fToBind.apply(this instanceof fNOP ? this : oThis, aArgs.concat(Array.prototype.slice.call(arguments))); + }; + + fNOP.prototype = this.prototype; + fBound.prototype = new fNOP(); + + return fBound; + }; +}