<script>
    /*
    * 手写bind方法
    * */
    Function.prototype.myBind = function (thisArg, ...args) {
      return (...newArgs) => {
        return this.call(thisArg, ...args, ...newArgs)
      }
    }
    const obj = {
      name: 'zs',
      age: 18,

    }
    function fn (a, b, c) {
      console.log(this)
      console.log(a + b + c)
      return a + b + c
    }
    const bindFunc = fn.myBind(obj, 1, 2)
    const result = bindFunc(3)
    console.log('返回值:', result)


  </script>