Any way to modify 'this' in JavaScript?

Question

I found this answer: How to modify "this" in javascript

But I did not like it. Surely there must be a way to somehow modify this?

Answer 1

Actually the problem here is that when you binding the function to a number then the this is getting changed to number and now when you are doing the assignment operation this += 5; the left hand side is not a variable where we can store the new value as its a primitive number instance. so to overcome that what you can do is you can store the this value in another variable say me and then do the operation as following:

(function() {

    var a = function(v) {
        v += 10;

        a = function() {
            var me = this;
            console.log(this); //logs Number {[[PrimitiveValue]]: 10}
            me += 5; 
            console.log(me); //logs 15
        }.bind(v)

        //a();
    }

    a(0);
    a();

})();