How to access the String when creating a new method for String.prototype in javascript

Question

I'm trying to learn how to add new methods in the String.prototype in JavaScript. But I can't figure out a way on how to access the string specified in the new method:

String.prototype.new_method = function(){ THE_STRING; };

So that it will return "abc" when I call it:

"abc".new_method();

I know this can easily be done by doing:

function returnstring(str){
   return str;
}

But I really want to learn how prototypes in JavaScript works.

Elliot B. · Accepted Answer · 2012-02-20 03:01:25Z

3

Use 'this' to access the string:

String.prototype.new_method = function(){ alert(this); };
"abc123".new_method();

edited Feb 20, 2012 at 3:01

answered Feb 20, 2012 at 2:55

Elliot B.

17.7k11 gold badges85 silver badges103 bronze badges

Sign up to request clarification or add additional context in comments.

Comments

alex · Accepted Answer · 2012-02-20 02:54:01Z

0

You can access the string with this.

answered Feb 20, 2012 at 2:54

alex

492k205 gold badges890 silver badges992 bronze badges

Collectives™ on Stack Overflow

How to access the String when creating a new method for String.prototype in javascript

2 Answers 2

Comments

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

Comments

Comments

Your Answer

Sign up or log in

Post as a guest

Related