I want to set Opacity of div's background without affecting contained element in IE 8. have a any solution and don't answer to set 1 X 1 .png image and set opacity of that image because I am using dynamic opacity and color admin can change that
I used that but not working in IE 8
#alpha {
filter: alpha(opacity=30);
-moz-opacity: 0.3;
-khtml-opacity: 0.3;
opacity: 0.3;
}
and
rgba(0,0,0,0.3)
also.
This question is related to
css
internet-explorer-8
opacity
it's simple only you have do is to give
background: rgba(0,0,0,0.3)
& for IE use this filter
background: transparent;
zoom: 1;
filter: progid:DXImageTransform.Microsoft.gradient(startColorstr=#4C000000,endColorstr=#4C000000); /* IE 6 & 7 */
-ms-filter: "progid:DXImageTransform.Microsoft.gradient(startColorstr=#4C000000,endColorstr=#4C000000)"; /* IE8 */
you can generate your rgba filter from here http://kimili.com/journal/rgba-hsla-css-generator-for-internet-explorer/
opacity on parent element sets it for the whole sub DOM treeYou can't really set opacity for certain element that wouldn't cascade to descendants as well. That's not how CSS opacity works I'm afraid.
What you can do is to have two sibling elements in one container and set transparent one's positioning:
<div id="container">
<div id="transparent"></div>
<div id="content"></div>
</div>
then you have to set transparent position: absolute/relative so its content sibling will be rendered over it.
rgba can do background transparency of coloured backgroundsrgba colour setting on element's background-color will of course work, but it will limit you to only use colour as background. No images I'm afraid. You can of course use CSS3 gradients though if you provide gradient stop colours in rgba. That works as well.
But be advised that rgba may not be supported by your required browsers.
But if you're after some kind of masking the whole page, this is usually done by adding a separate div with this set of styles:
position: fixed;
width: 100%;
height: 100%;
z-index: 1000; /* some high enough value so it will render on top */
opacity: .5;
filter: alpha(opacity=50);
Then when you display the content it should have a higher z-index. But these two elements are not related in terms of siblings or anything. They're just displayed as they should be. One over the other.
What about this approach:
<head>_x000D_
<style type="text/css">_x000D_
div.gradient {_x000D_
color: #000000;_x000D_
width: 800px;_x000D_
height: 200px;_x000D_
}_x000D_
div.gradient:after {_x000D_
background: url(SOME_BACKGROUND);_x000D_
background-size: cover;_x000D_
content:'';_x000D_
position:absolute;_x000D_
top:0;_x000D_
left:0;_x000D_
width:inherit;_x000D_
height:inherit;_x000D_
opacity:0.1;_x000D_
}_x000D_
</style>_x000D_
</head>_x000D_
<body>_x000D_
<div class="gradient">Text</div>_x000D_
</body>Use RGBA or if you hex code then change it into rgba. No need to do some presodu element css.
function hexaChangeRGB(hex, alpha) {
var r = parseInt(hex.slice(1, 3), 16),
g = parseInt(hex.slice(3, 5), 16),
b = parseInt(hex.slice(5, 7), 16);
if (alpha) {
return "rgba(" + r + ", " + g + ", " + b + ", " + alpha + ")";
} else {
return "rgb(" + r + ", " + g + ", " + b + ")";
}
}
hexaChangeRGB('#FF0000', 0.2);
css ---------
background-color: #fff;
opacity: 0.8;
OR
mycolor = hexaChangeRGB('#FF0000', 0.2);
document.getElementById("myP").style.background-color = mycolor;
Try setting the z-index higher on the contained element.
It affects the whole child divs when you use the opacity feature with positions other than absolute. So another way to achieve it not to put divs inside each other and then use the position absolute for the divs. Dont use any background color for the upper div.
Maybe there's a more simple answer, try to add any background color you like to the code, like background-color: #fff;
#alpha {
background-color: #fff;
opacity: 0.8;
filter: alpha(opacity=80);
}
Source: Stackoverflow.com