手写系列--apply/call/bind

Function.prototype.hyApply = function(thisArg,otherArgs){
    //判断thisArg的类型并进行类型转换
    thisArg = (thisArg === null || thisArg === undefined) ? window : Object(thisArg)
    
    //thisArg.fn = this
    
    //为thisArg设置fn属性并设置为不可枚举
    Object.defineProperty(thisArg,'fn',{
        configurable:true,
        writable:true,
        enuramble:false,
        value:this
    })
    thisArg.fn(...otherArgs)
    delete thisArg.fn
}


function foo(name,age){
    console.log(this,name,age)
}

foo.hyApply('123',['kxs',22]) //String{'123'} 'kxs' 22

Function.prototype.hyCall = function(thisArg,...otherArgs){
    //判断thisArg的类型并进行类型转换
    thisArg = (thisArg === null || thisArg === undefined) ? window : Object(thisArg)
    
    //thisArg.fn = this
    
    //为thisArg设置fn属性并设置为不可枚举
    Object.defineProperty(thisArg,'fn',{
        configurable:true,
        writable:true,
        enuramble:false,
        value:this
    })
    thisArg.fn(...otherArgs)
    delete thisArg.fn
}


function foo(name,age){
    console.log(this,name,age)
}

foo.hyCall('123','kxs',22)  //String{'123'} 'kxs' 22

function execFn(thisArg,otherArgs,fn){
    //判断thisArg的类型并进行类型转换
    thisArg = (thisArg === null || thisArg === undefined) ? window : Object(thisArg)
    
    //thisArg.fn = this
    
    //为thisArg设置fn属性并设置为不可枚举
    Object.defineProperty(thisArg,'fn',{
        configurable:true,
        writable:true,
        enuramble:false,
        value:fn
    })
    thisArg.fn(...otherArgs)
    delete thisArg.fn
}
Function.prototype.hyApply = function(thisArg,otherArgs){
    execFn(thisArg,otherArgs,this)
}

Function.prototype.hyCall = function(thisArg,...otherArgs){
    execFn(thisArg,otherArgs,this)
}

function foo(name,age){
    console.log(this,name,age)
}
foo.hyCall('123','kxs',22) //String{'123'} 'kxs' 22
foo.hyApply('123',['kxs',22]) //String{'123'} 'kxs' 22

Function.prototype.hyBind = function(thisArg,...otherArgs){
    //判断thisArg的类型并进行类型转换
    thisArg = (thisArg === null || thisArg === undefined) ? window : Object(thisArg)
    
    //thisArg.fn = this
    
    //为thisArg设置fn属性并设置为不可枚举
    Object.defineProperty(thisArg,'fn',{
        configurable:true,
        writable:true,
        enuramble:false,
        value:this
    })
    
    return (...newArgs) => {
        let args = [...otherArgs,...newArgs]
        thisArg.fn(...args)
    }
}

function foo(name,age){
    console.log(this,name,age)
}

let newFoo = foo.hyBind('123','kxs')
newFoo(22) //String {'123', fn: ƒ} 'kxs' 22
newFoo(23) //String {'123', fn: ƒ} 'kxs' 23
newFoo(24) //String {'123', fn: ƒ} 'kxs' 24