How to handle lack of JavaScript Object.bind() method in IE 8

Question

I am writing a bit of JavaScript that uses the Object.bind method.

funcabc = function(x, y, z){      this.myx = x;     this.playUB = function(w) {         if ( this.myx === null ) {             // do blah blah             return;         }          // do other stuff     };     this.play = this.playUB.bind(this); }; 

Since I develop in WinXP with Firefox and sometimes test in Win7 with IE 9 or 10, I did not notice or pay attention to the fact that IE8 and below do not support bind.

This particular script does not use the canvas, so I'm a little hesitant to write off all IE 8 users.

Is there a standard work-around?

I'm getting around sort of okay in JavaScript, but I'm still a bit of a noob. So forgive me if the solution is totally obvious.

Answer 1

There is a good compatability script on this page: https://developer.mozilla.org/en/JavaScript/Reference/Global_Objects/Function/bind

Just copy and paste it into your script.

EDIT: placing the script below for clarity.

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 && oThis                  ? this                  : oThis,                  aArgs.concat(Array.prototype.slice.call(arguments)));         };      fNOP.prototype = this.prototype;     fBound.prototype = new fNOP();      return fBound;   }; } 

Answer 2

The best solution could be to install Modernizr.

Modernizr tells you whether the current browser has this feature natively implemented or not and it provides a script loader so you can pull in polyfills to backfill functionality in old browsers.

Here is the link to generate your modernizr custom version:
http://modernizr.com/download/#-teststyles-testprop-testallprops-hasevent-prefixes-domprefixes