windy
6 years ago
10 changed files with 4 additions and 209 deletions
@ -1,29 +0,0 @@ |
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if (!Function.prototype.bind) { |
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Function.prototype.bind = function(oThis) { |
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if (typeof this !== 'function') { |
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// closest thing possible to the ECMAScript 5
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// internal IsCallable function
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throw new TypeError('Function.prototype.bind - what is trying to be bound is not callable'); |
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} |
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var aArgs = Array.prototype.slice.call(arguments, 1), |
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fToBind = this, |
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fNOP = function() {}, |
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fBound = function() { |
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return fToBind.apply(this instanceof fNOP |
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? this |
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: oThis, |
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// 获取调用时(fBound)的传参.bind 返回的函数入参往往是这么传递的
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aArgs.concat(Array.prototype.slice.call(arguments))); |
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}; |
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// 维护原型关系
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if (this.prototype) { |
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// Function.prototype doesn't have a prototype property
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fNOP.prototype = this.prototype; |
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} |
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fBound.prototype = new fNOP(); |
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return fBound; |
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}; |
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} |
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