Do I really need to check if an element exists with jQuery?

Question

I recently had a question about how to correctly check if an element exists with jQuery. I found the answer from here:

https://learn.jquery.com/using-jquery-core/faq

Answer 1

Is more simple to check if exists and , if we want more info from the object we will not receive null object error.

if (!!$( "#myDiv" )) {
    //do something
}