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What is the most efficient way to clone an object in Javascript?

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What is the most efficient way to clone an object in Javascript?
posted Mar 31, 2015 by Merry

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1 Answer

+2 votes
 
Best answer

I want to note that the .clone() method in jQuery only clones DOM elements. In order to clone JavaScript objects, you would do:

// Shallow copy
var newObject = jQuery.extend({}, oldObject);

// Deep copy
var newObject = jQuery.extend(true, {}, oldObject);

More information can be found in the jQuery documentation.

I also want to note that the deep copy is actually much smarter than what is shown above – it's able to avoid many traps (trying to deep extend a DOM element, for example). It's used frequently in jQuery core and in plugins to great effect.

answer Apr 17, 2015 by Vrije Mani Upadhyay
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