jQuery – Run script IF!

Thank you very much for this hint, I’m a jquery newbie and this made my day! :)

It is really something new for me…seems interesting

By far the most concise and up to date information I found on this topic. Sure glad that I navigated to your page by accident. I’ll be subscribing to your feed so that I can get the latest updates. Appreciate all the information here

is that easy? love it,thanks for sharing. p

Thank you very much for this hint. keep on posting like this examples :)

any length (!):

if ($('#element').length) {
  // everything you want to run inside here.
}

oups )

if ($(yourElementSelector).length) {
  // your beautiful code poetry :)
}

regards

Thank you, for helping me ^_^

I usually find it simpler to use something like this:

if (document.getElementById('elementsID')) {
  // code in here
}

This will only work with IDs, and there is no hash mark used, just the value in id="" – this keeps from needing jQuery to process and convert the code to vanilla javascript – possibly negligible performance increase, but it should be faster than using jQuery functions – and of course all your jQuery can still go right inside of it

I think it perfect usage at some situation.

I liked your post. Cheers

jQuery comes with a size() function. In javascript the number 0 = false so you can drop the >0.

if ($('#el').size()) {
  // code
}

// To run script if element dont exists
if (!$('#el').size()) {
  // code
}

But jQuery intern mechanism already implement this so you can avoid the if(){} if it is simple function like: $('#dontExistsElement').slideUp();

I want to implement a slider functionality in my application. I found it implemented using jQuery1.9.1 version. However, my application uses jQuery 1.2.6. Now when I try to include 1.9.1 version, it shows incompatibilty issues. Is there any slider functionality implemented using 1.2.6? Or is there any other workaround for this issue?