Looping through jQuery object and getting data value

Question

I have a jQuery object which I get via code such as this:

var elements = $('#all_cats_holder div.wSelect-option-selected').detach();

The code it gets will be something such as:

<div class="wSelect-option wSelect-option-selected"><div class="wSelect-option-value" data-val="2">Some stupid cat #2</div></div>
<div class="wSelect-option wSelect-option-selected"><div class="wSelect-option-value" data-val="3">Some stupid cat #3</div></div>
<div class="wSelect-option wSelect-option-selected"><div class="wSelect-option-value" data-val="4">Some stupid cat #4</div></div>

Now I'm trying to loop through this data and get the value of data-val but I can't seem to get it to work.

My code:

var mr_val;

$.each(elements, function(index, el) {

    mr_val = el.data('val');

    alert(mr_val);            

});

I don't even get an alert at all.

That's because you're looping through the outer divs, which have no data-val attribute. You want to traverse to the child div, and then pull the attribute from that. — Patrick Q
– Patrick Q, Commented Apr 4, 2014 at 16:56
Those elements doesn't seem to match the class given in the selector, are you sure that's what you're getting. — adeneo
– adeneo, Commented Apr 4, 2014 at 16:57
Note that el inside the loop is not a jQuery object, and has no data() method — adeneo
– adeneo, Commented Apr 4, 2014 at 17:01

adeneo · Accepted Answer · 2014-04-04 16:59:25Z

2

Why not just make it an array with $.map

var mr_val = $.map(elements, function(el) {
    return $(el).find('[data-val]').data('val');
});

FIDDLE

or with each

var mr_val;

$.each(elements, function(index, el) {

    mr_val = $(el).find('div').data('val');

    alert(mr_val);            

});

answered Apr 4, 2014 at 16:59

adeneo

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