jquery: apply css rule to data attribute added to an element?

Question

Without using class, how can I apply a simple css rule on a data attribute that gets dynamically added? Here's my current solution with classes, I want to replace this with adding data, and apply the css rule to elements with data attribute 'highlight'. Is this possible? The reason I am doing this is to avoid messing with the underlying DOM data.

$(document).on('mouseover',function (e) {
    e.stopPropagation();
    $(e.target).addClass('highlight');

}).on('mouseout', function (e) {
        e.stopPropagation();
        $(e.target).removeClass('highlight');
});

so you wanna add data "highlight" and a css rule to the hovered element, and then remove them on mouseout, am I right? — Amin Jafari
– Amin Jafari, Commented Sep 7, 2014 at 4:49
@AminJafari yes that is correct, I wasn't sure if this was possible to select elements via data value. — user299709
– user299709, Commented Sep 7, 2014 at 4:50

dashtinejad · Accepted Answer · 2014-09-07 04:55:59Z

2

jQuery

$(document).on('mouseover',function (e) {
    e.stopPropagation();
    $(e.target).attr('data-highlight', 'init');

}).on('mouseout', function (e) {
    e.stopPropagation();
    $(e.target).removeAttr('data-highlight');
});

CSS

[data-highlight] {
    background: yellow;
}

jsFiddle Demo.

answered Sep 7, 2014 at 4:55

dashtinejad

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2 Comments

user299709 Over a year ago

can you also use that selector in jquery? $('*[data-highlight]) ?

dashtinejad Over a year ago

@user299709 Yes, all css selectors exists in jQuery.

Amin Jafari · Accepted Answer · 2014-09-07 04:59:47Z

if you want what I said in the comments then this is the correct approach:

$(document).on('mouseover',function (e) {
    e.stopPropagation();
    $(e.target).data('highlight',true).css('background-color','#F00'); //the background is an example

}).on('mouseout', function (e) {
        e.stopPropagation();
        $(e.target).data('highlight',false).css('background-color','#CCC');
});

Although if you wanna select an element by its data attribute, then you may wanna take a look at this. the code below gets all the <a> with the data attribute highlight set as true:

$(document).on('mouseover',$('a').filter(function(){return $(this).data('highlight');}), function(){

}).on('mouseout', $('a').filter(function(){return $(this).data('highlight');}), function(){

});

cs1193 · Accepted Answer · 2014-09-07 04:53:20Z

0

I believe this is what is needed.

$(e.target).addClass('highlight').css('display', 'block');

or could be

$(e.target).data('class','highlight').css('display', 'block');

just because you mentioned to add a data attribute

answered Sep 7, 2014 at 4:53

cs1193

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