bind 仿造 重写bind

简单版，不带参数

Function.prototype.my_bind = function(targ){
  var _this = this;
  return function(){
    _this.apply(targ)
  }
}
function f() {
  console.log(`${this.name}`);
}
var o = {
  name: 'liu'
};
f.my_bind(o)();

带参数

Function.prototype.my_bind = function(){
  var _this = this;
  var targ = Array.prototype.shift.call(arguments)
  var arg = Array.prototype.slice.call(arguments)
  return function(){
    _this.apply(targ, Array.prototype.concat.apply(arg, arguments))
  }
}
function f(a,b,c) {
  console.log(`${this.name} ${a} ${b} ${c}`);
}
var o = {
  name: 'liu'
};
f.my_bind(o, 1, 2)(3);

标签：function,name,bind,targ,var,prototype,重写,仿造
来源： https://www.cnblogs.com/liujinyu/p/11507679.html