check if cached jquery object is still in DOM

Question

Does anyone know how to tell if a cached jQuery object has gone stale, e.g. is no longer in the DOM? For example:

var $cached_elem = $(\'.the_button\');

//         


        

Answer 1

The native document.contains() method should be faster than jQuery to determine if a cached jQuery element exists in the DOM.

if (document.contains($cached_elem[0])) {
    // Element is still in the DOM
}