How do I check if an element exists if the element is created by .append() method? $('elemId').length doesn't work for me.

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8 Answers

$('elemId').length doesn't work for me.

You need to put # before element id:

$('#elemId').length ---^

With vanilla JavaScript, you don't need the hash (#) e.g. document.getElementById('id_here') , however when using jQuery, you do need to put hash to target elements based on id just like CSS.

8

Try to check the length of the selector, if it returns you something then the element must exists else not.

 if( $('#selector').length ) // use this if you are using id to check { // it exists } if( $('.selector').length ) // use this if you are using class to check { // it exists }
5

Try this:

if ($("#mydiv").length > 0){ // do something here }

The length property will return zero if element does not exists.

5

How do I check if an element exists 

if ($("#mydiv").length){ }

If it is 0, it will evaluate to false, anything more than that true.

There is no need for a greater than, less than comparison.

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your elemId as its name suggests, is an Id attribute, these are all you can do to check if it exists:

Vanilla JavaScript: in case you have more advanced selectors:

//you can use it for more advanced selectors if(document.querySelectorAll("#elemId").length){} if(document.querySelector("#elemId")){} //you can use it if your selector has only an Id attribute if(document.getElementById("elemId")){}

jQuery:

if(jQuery("#elemId").length){}
7

You can also use array-like notation and check for the first element. The first element of an empty array or collection is simply undefined, so you get the "normal" javascript truthy/falsy behaviour:

var el = $('body')[0]; if (el) { console.log('element found', el); } if (!el) { console.log('no element found'); }

You can use native JS to test for the existence of an object:

if (document.getElementById('elemId') instanceof Object){ // do something here }

Don't forget, jQuery is nothing more than a sophisticated (and very useful) wrapper around native Javascript commands and properties

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If you have a class on your element, then you can try the following:

if( $('.exists_content').hasClass('exists_content') ){ //element available }
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