JS - creating user-defined function for custom js objects

Question

The question is as simple as - is it possible to create a user-defined method for standard js objects like the val method for input ? That is, to do smth like:

function my_new_method()
{
   ...
}

...
alert($('td input').my_new_method())

Have a look in to Javascript Prototype and this MDN article might help too. — Tigger
– Tigger, Commented Oct 12, 2016 at 10:15
you should try to read about jquery plugins, Here there is a sample: learn.jquery.com/plugins/basic-plugin-creation — Mayday
– Mayday, Commented Oct 12, 2016 at 10:18

Daniel A. White · Accepted Answer · 2016-10-12 10:14:04Z

3

Since that is looks like jQuery (not vanilla/standard JavaScript), you can simply use $.fn.my_new_method = // your function

You can read up on how to create a jQuery plugin here: https://learn.jquery.com/plugins/basic-plugin-creation/

answered Oct 12, 2016 at 10:14

Daniel A. White

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Comments

Niklesh Raut · Accepted Answer · 2016-10-12 10:19:34Z

1

You can use Object prototype.

Object.prototype.my_new_method = function() {
        console.log(this.val());
    }

$("#test").my_new_method();

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<input type='text' value='abc' id="test">

answered Oct 12, 2016 at 10:19

Niklesh Raut

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