Question

Using JQuery, how do you check if an element’s previous sibling is the first-child?

I have tried the following code but it does not work:

if( $(this).prev() === $(this).siblings(":first-child") ){
    //do something
}

An example using the above === approach: http://jsfiddle.net/xnHfM/

Answer 1

if($(this).index() === 1){ // if index is 1 it means it's for sure the second children
  // here u can grab $(this).prev(), and it's for sure the first one
}

demo http://jsfiddle.net/p7sAq/

p.s. I’ll try to see the perf about this solution vs .is(‘:first-child’) => http://jsperf.com/jquery-check-previous-first-child

edit : see last comment, thanks @RightSaidFred 🙂