I have a simple question. We are looking to enhance some static images by adding a lightening effect with an overlay. For example, when hovering over an image like on this website: (just for the lightening effect). What is the best approach to achieve this using jQuery?
Thank you in advance.
To achieve the desired effect, nest two divs inside each other.
Alternatively, consider placing an image <img/> within the container.
<div class="image-wrapper">
<div class="image-overlay"></div>
</div>
Below is the necessary CSS code: (I assumed that all images have the same dimensions as those provided in your link. Alternatively, you can specify relative (in %) CSS properties.)
.image-wrapper {
position: relative;
width: 150px; /* Specify your image width */
height: 250px; /* Specify your image height */
background: url('path/to/your/image.png');
}
.image-overlay {
position: absolute;
z-index: 5; /* Ensure this value is one higher than the layer above */
width: 150px; /* Specify your image width */
height: 250px; /* Specify your image height */
display: none;
background-color: '#666666'; /* Choose your desired color */
opacity: 0.8;
}
Implement it with jQuery:
$('.image-wrapper').mouseenter(function() {
$(this).children('.image-overlay').fadeIn('fast');
}).mouseleave(function() {
$(this).children('.image-overlay').fadeOut('fast');
});
Remember to include vendor prefixes and filters for IE to ensure compatibility with older browsers. Additionally, deactivate features for very outdated versions of IE and Safari.
You have the ability to achieve this using CSS alone
.myDiv:hover {
background-image:url(/path/to/transparent.png); /* Set the width and height to 1px, and choose the desired color and opacity */
background-repeat:repeat;
}
An issue with opacity arises in IE7 (and possibly in IE8 as well)
You can create a similar effect using just CSS. Simply add the following code to your stylesheet:
img {
opacity: 1.0;
}
img:hover {
opacity: 0.4;
}
If you need to support IE8 and later, you can use the following code:
filter: alpha(opacity=x);
Adding opacity to an element won't result in a "lighter" hover state. One way to achieve this effect is by using negative margin or z-index to overlay a white div on top of the image. This will create a true white fade on hover. The following code can be used as a solution to consistently achieve the desired "lighten" effect even without a white background.
Check out the demonstration on this fiddle
HTML
<h3>Just Opacity</h3>
<a href="#" class="one"><img src="http://userserve-ak.last.fm/serve/252/15767501.jpg" /></a>
<h3>With an overlay</h3>
<a href="#" class="two"><img src="http://userserve-ak.last.fm/serve/252/15767501.jpg" /></a>
<a class="three"> </a>
CSS
body {
background: #262626;
}
h3 {
color: white;
}
a:hover.one {
opacity: .5;
}
.two {
}
a.three {
width: 252px;
height: 250px;
background: #FFF;
display: block;
margin: -254px 0 0 0;
position: relative;
opacity: .0;
}
a:hover.three {
opacity: .7;
}
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