Question

How can I evaluate, on keyup, whether or not two elements have a certain type of data, as attached by the $.data() method of jQuery?

<input type="text" class="some_div"></input>
<input type="text" class="some_div"></input>

---

$('.some_div').keyup(function(){
  //do BOTH elements have some data?
    //do something
  // else
    //do something else
});

Answer 1

var a = $('#A');
var b = $('#B');

if (a.data('key') === b.data('key')) {
  //do something
} else {
  //do something elsy
}