Check for existence of specific data attribute value

Question

I'm trying to select a DOM element with a specific attribute value. I'd like to avoid an each() loop, but all I've seen in jQuery is the ability to detect the existence of the data attribute, not its value. So, I want to accomplish something like this:

if ($('.item[data-index="' + indexVal + '" ]'){
  //if an .item with the data-index value of indexVal exists...
}

Answer 1

missing ) and $(selector) should not be put in a if condition. it is always true even it does not select anything.

if ($('.item[data-index="' + indexVal + '" ]').length) {

Answer 2

try this:

if ($('.item[data-index="' + indexVal + '" ]').length > 0){

}