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27 lines
587 B
27 lines
587 B
/** |
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* @description 模拟 bind |
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* @date 2022-06-30 |
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* @article https://zhuanlan.zhihu.com/p/50539121 |
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*/ |
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(Function as any).prototype.myBind = function myBind(newThis, ...args) { |
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// 下边会用到该作用域的 this，所以这里需要保存 this 的指向 |
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const self = this; |
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const bindFunction = function (...argss) { |
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return self.apply(newThis, [...args, ...argss]); |
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}; |
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return bindFunction; |
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}; |
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const obj = { |
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name: "myBind", |
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}; |
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function original(a, b) { |
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console.log(this.name); |
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console.log([a, b]); |
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} |
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const bound = (original as any).myBind(obj, 1); |
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bound(2);
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