How to implement bind in JavaScript

Today, I would like to talk to you about how to achieve bind in JavaScript, many people may not know much about it. In order to make you understand better, the editor summarized the following content for you. I hope you can get something according to this article.

"the simplest bind line can be implemented without examining too many of your boundary conditions in the actual interview process."

Function.prototype.fakeBind = function (obj) {

Return (... args) = > this.apply (obj, args)

}

Test it

Function f (arg) {

Console.log (this.a, arg)

}

/ / output: 3, 4

F.bind ({a: 3}) (4)

/ / output: 3, 4

F.fakeBind ({a: 3}) (4)

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