How to add static method to built in class in JavaScript

Question

I'd like to create a tryParse() static method for Date class. How can I do that?

Date.prototype.tryParse = function (value, result) {
    // ... Code ...
};

This adds an instance method, not a static class method. Any idea?

Yep. Sorry, I didn't remove the typings when writing the question. Correcting now. — Adam Szabo
– Adam Szabo, Commented Apr 1, 2014 at 23:22

David Wolever · Accepted Answer · 2014-04-01 22:32:09Z

12

First: you really, really shouldn't. To avoid collisions and incompatibilities, it's really much, to keep that sort of method in a namespace specific to your project:

var myUtils = {};
myUtils.tryParseDate = function(…) {…}

BUT! If you really, really, want to:

Date.tryParse = function(…) {…}

answered Apr 1, 2014 at 22:32

David Wolever

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