实现简单的bind函数.md

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模拟传参实现

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Function.prototype.bind = function (...args) {
	const self = this
	const bindTarget = args.shift()
	return function (...args1) {
		return self.apply(bindTarget, [...args, ...args1])
	}
}

完整版perf: 加上构造函数作用域实现

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Function.prototype.bind = Function.prototype.bind || function (context, ...args1) {
  const self = this
  const fBound = function (...args2) {
    return self.apply(context, [...args1, ...args2])
  }
  fBound.prototype = this.prototype
  return fBound
}