Bind method in Javascript for functions

The bind method will be applied to a function and will make use of an object to operate with its values. In the first case of the example we have a function created that will operate by means of bind through an object in which we choose a value and another value to hazar, then it makes the multiplication. In the second case we have a function inside an object, we will use bind choosing the function of this object, applying it again to the object, in this case they are not necessary parameters since the function of the object does not take them.

<script>
  var obj_basic = {obj1: 0.5, obj2: 0.8}; 
  var obj_new = function(client, val){ 
     return this[client]*val; 
  } 
  
  var discount = obj_new.bind(obj_basic); 
  console.log(discount('obj1', 50));//25
  
  var obj_basic_2 = {
  	val: 10,
  	getVal: function() {
      return this.val;
    }
  };
  /**********************************/
  var discount2 = obj_basic_2.getVal.bind(obj_basic_2);
  console.log(discount2());
</script>