jQuery Filter children which has a particular attribute

Question

I have some li elements among them some of the li has an attribute data-brandId and some of them don't have this attribute. I have the parent ul from which I am filtering it as:

var selectedLis = new Array();
$('ul').children('li').each(function(){
    if($(this).attr(attribute) != null) {
        selectedLis.push($(this));
    }
});

Is there any better way to achieve this; like by using filter etc?

Update:

I am getting TypeError: $(...).data(...) is undefined

The rendered HTML is:

<li data-entityid="WF/008/DAM" class="dropdownli filterItem">&nbsp;&nbsp;&nbsp;
    <input type="checkbox" data-entityid="WF/008/DAM" value="WF/008/DAM/014" name="damBrand">
    <label>E&amp;W Portfolio</label>
</li>

This is giving me the error:

var lis = $('ul[name=damBrandMenu]').children('li').filter(function(){
    return $(this).data('entityId').length;
});

Also say I don't have the data-entityId in the li, instead I have this attribute in the input[type="checkbox"] which is the child of li, as you can see in the HTML. Then what will be the way for filtering? Is it:

var lis = $('ul[name=damBrandMenu]').children('li').filter(function(){
    return $('> input[type="checkbox"]', this).data('entityid').length;
});

I have also tried: $(this).attr('data-entityId').length; and $('> input[type="checkbox"]', this).attr('data-entityId').length;, but they are also not working. I am having same error; TypeError: $(...).attr(...) is undefined.

Answer 1

var selectedLis = $('ul').children('li[data-brandId]');

or with a filter:

var selectedLis = $('ul').children('li').filter(function() {
    return $(this).data('brandId');
});