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jQuery Check if an Element Exists

By Sam Deering

JavaScript

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😳 Ever felt a little embarassed sharing your JavaScript? Let's fix it.

jQuery code snippet to check whether a html element exists on the current web page. The easiest way i’ve found to do this is to check the length of an object to see if it exists in the DOM.

//check if an element exists by using length
if ($("#id").length) {
  //it does!
}

//or length equals zero
$('element').length == 0; // no element found

//or using plain javascript
document.getElementById('eid') != null)

Snazzy jQuery Function, Sir?

jQuery.fn.exists = function(){return jQuery(this).length>0;}

if ($(selector).exists()) {
    // Do something
}

Or to check a jQuery object array for presence:

if ( $('#myDiv')[0] ) { //do something }

Sam Deering has 15+ years of programming and website development experience. He was a website consultant at Console, ABC News, Flight Centre, Sapient Nitro, and the QLD Government and runs a tech blog with over 1 million views per month. Currently, Sam is the Founder of Crypto News, Australia.

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