bind的模拟实现
bind的模拟实现如下:
Function.prototype.myBind() = function (context = window, ...args1) { if(this === Function.prototype) { throw 'Error' } const _this = this return function F (...args2) { if ( this.instanceof F ) { return new _this(...args1, ...args2) } return _this.apply(context, args1.concat(args2)) } }