bind的使用

Posted 2022-01-16 zhaodagang8

bind: 改变this的指向，返回一个新函数

let obj = 
  name: ‘jason888‘


function fun(name,age)
  //console.log(888);
  //console.log("this:",this);
  console.log("this.name:",this.name);
  // console.log("arguments:",arguments.callee);
  // console.log("Array:",Array.prototype);
  // console.log(name);
  // console.log(age);

//let foo = fun.bind(obj,‘meay‘,33);
//foo();

//bind: 改变this指向，返回一个新函数
Function.prototype.bind2 = function(context)
  let self = this;
  return function()
    self.apply(context,Array.prototype.slice.call(arguments,1))
  


let foo = fun.bind2(obj,‘meay‘,33);
foo();