手写js的bind方法

Function.prototype.myBind = function(context, ...args){
    if(!context || context == null){
        context = window;
    }
    let fn = Symbol();
    context[fn] = this;
    let _this = this;
    const result = function(...innerArgs){
        if(this instanceof _this){
             this[fn] = _this;
             this[fn](...[...args, ...innerArgs]);
             delete this[fn];
        }
        else{
            context[fn](...[...args, ...innerArgs]);
            delete context[fn];
        }
    }
    result.prototype = Object.create(this.prototype);
    return result;
}

作者：Big shark@LX 链接：juejin.cn/post/700463…