Created
May 8, 2014 03:38
-
-
Save skymarionsky/27f412e26189cc10718e to your computer and use it in GitHub Desktop.
IE8以下などでbindが実装されていない場合にbindを追加する
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
/* | |
https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Function/bind | |
*/ | |
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; | |
}; | |
} |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment