Adjusting Transparency using jQuery

I have a grid with 9 items, and I want each item to have an opacity of 0.5 initially. When the user hovers over an item, I want it and its contents to have an opacity of 1.0.

Check out the JavaScript code below:

$('.gallery-single').css({ opacity: 0.5 });

$('.gallery-single a').mouseover(function(){
    $('.gallery-single-title', this).css('display', 'block');
        $('.gallery-single', this).css({ opacity: 1 });
});
$('.gallery-single a').mouseout(function(){
    $('.gallery-single-title', this).css('display', 'none');
        $('.gallery-single', this).css({ opacity: 0.5 });
});

And here is how the HTML structure looks like:

<div class="gallery-single">
<a href="#" title="">
<div class="gallery-single-title hide">Some text goes here</div>
<div class="gallery-single-img"><img src="http://img.youtube.com/vi/code/0.jpg" width="300" height="200" /></div>
</a>
</div>

All items start with an opacity of 0.5 but do not change when focused. Any ideas on what could be going wrong here?

jquerycssmouseoveropacitymouseout

Answer №1

Give this a shot:

$('.gallery-single a').hover(function(){
    $(this).closest('.gallery-single-title').css('display', 'block');
        $(this).closest('.gallery-single').css({ opacity: 1 });
},
function(){
    $(this).closest('.gallery-single-title').css('display', 'none');
        $(this).closest('.gallery-single').css({ opacity: 0.5 });
});

Check out the demo here.

Answer №2

The issue lies in the fact that .gallery-single is positioned as a predecessor of the anchor (meaning it's located outside the anchor). The syntax $(selector, this) searches for the selector inside this. To resolve this, utilize .closest():

$(this).closest('.gallery-single').css(...);

Important note: jQuery issues a caution regarding mouseover events (also applicable to mouseout):

This event type has the potential to induce complexities due to event bubbling. For example, when the mouse pointer traverses over the Inner element in this scenario, a mouseover event is first dispatched to Inner and then propagates up to Outer. This could inadvertently trigger our attached mouseover handler at inappropriate moments. Refer to .mouseenter() discussions for an advantageous alternative.

It is advisable to opt for mouseenter (and mouseleave) instead (or leverage the hover() function which conveniently integrates both).

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