Check If Element Exists in jQuery [Duplicate]

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
}

Try this:

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

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

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.

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){}

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