CSS Opacity Property - html

Hi i am using CSS Opacity Property for a div tag and it works well but the problem is when I write some text or paste images on that div tag they also become fade. I just need div back color to be fade and not the div content. My code is ...
#fade div
{
opacity:0.1;
filter:alpha(opacity=10); /* For IE8 and earlier */
width:750px;
height:150px;
background-color:#FFFFFF;
}
#text in fade div
{
font-weight:bold;
color:#8A2BE2;
}
Thankyou !!!

It's much easier to use rgba() or a transparent PNG for the background.
rgba(0, 0, 0, .1);
rgba(0, 0, 0); //fallback

You can use rgba() property for this:
write like this:
#fade div
{
background-color: rgba(0,0,0,0.1);
width:750px;
height:150px;
background-color:#FFFFFF;
}
For IE you can use IE filter
background: transparent;-ms-filter: "progid:DXImageTransform.Microsoft.gradient(startColorstr=#19000000,endColorstr=#19000000)"; /* IE8 */ filter: progid:DXImageTransform.Microsoft.gradient(startColorstr=#19000000,endColorstr=#19000000); /* IE6 & 7 */ zoom: 1;
You can generate your filter from here http://kimili.com/journal/rgba-hsla-css-generator-for-internet-explorer/

Just use 1px semi transparent gif and repeat it by x and y. As far as I know it is the most easy way to set semi transparent background.

Ofcourse the opacity applies to the child elements as well.What you can do is to segragate your markup.
<div id='Div-With-Opacity-set'>
</div>
<div id='Child-Elements-for-the-above-div'>
</div>
Align your markup carefully such that the markup resembles what you want.

Why don't you reset the opacity then?
#text in fade div
{
font-weight:bold;
color:#8A2BE2;
opacity:1;
filter:alpha(opacity=100); /* For IE8 and earlier */
}

Your best bet without CSS3 is probably to create a div and put another div positioned on top of it, but not nested inside of it. Opacity filters down to ALL elements inside of the element with the opacity set.
If you put a div immediately to the right, and then gave it a margin of -750px;, you could give it an opacity of 1, but the div behind it could have an opacity of 0.1, and this would work fine.
With CSS3 you could do this:
#fade
{
width:750px;
height:150px;
background-color: rgba(255,255,255,0.1);
}
and just the background would be 0.1 opacity. The text would still be 1.
What I personally do most often though, is I create a small .png with the transparent background that I want, and then I set that .png as the background of an element. In photoshop I could set the opacity of the white background to 0.1, then save a 50X50 square, and then I've got nearly perfect transparency (no IE6).

something like http://jsfiddle.net/PWM5f/ you need

Related

How to apply an opacity filter to a cover [duplicate]

I have a paragraph element inside a div. The div has an opacity of 0.3 & the paragraph has an opacity of 1.
When I show the elements, it appears the paragraph is transparent, like it has an opacity of 0.3.
Is there a way to make the paragraph inside the div have full opacity? Maybe I can set a CSS value for this?
<div style="opacity: 0.3; background-color: red;">
<p style="opacity: 1;">abcde</p>
</div>
You can't, the opacity level is relative to the parent's opacity, always. So 1.0 inside 0.3 would be 100% of 0.3, which is 0.3, and 0.5 inside 0.3 would be 50% of 0.3 which is 0.15. If you're only using opacity for the background color, you can specify the color using the RGBA method so that the red will be opaque and not the content (and thus the paragraph inside it).
<div style="background-color: rgba(255, 0, 0, 0.3);">
<p>abcde</p>
</div>
See here.
I wanted to add this as a comment to animuson answer, but I can't post comments yet, so I'll just post it as an 'answer'. RGBa works great, but only in new browsers. Even IE8 doesn't support it, which is a serious setback, since many, MANY people still use IE8.
.color-block {
/* The Fallback Color */
background: rgb(200, 54, 54);
/* The Important Bit - Alpha Transparency */
background: rgba(200, 54, 54, 0.5);
}
Please read http://css-tricks.com/examples/RGBaSupport/ for more info.
I usually circumvent the problem entirely by using two divs. The first for the transparant background and the second for the content, positioned right over the first one. It's not neat, it's not nice, and I can't claim I'm happy with it, but... it even works in IE7 and IE6.
It's unfortunate that this doesn't work as you might expect. Other styles have a value for inherit - so why doesn't opacity?
There is a work-around if you're not doing anything too complicated:
Create a parent DIV (or other block element) with the width/height
you need and position:relative.
Create a child DIV with your transparency value, a width/height of
100% and position:absolute (possibly left/top:0 as well)
Create another child DIV with your content and the opacity set to
whatever you want.
Example:
<div style="width:200px;height:100px;position:relative">
<div style="opacity:.03;background-color:blue;width:100%;height:100%;position:absolute;left:0;top:0"></div>
<div style="opacity:.09">This is my content</div>
</div>
it's simple only you have do is to give
background: rgba(255,0,0,0.3)
& for IE use this filter
background: transparent;
-ms-filter: "progid:DXImageTransform.Microsoft.gradient(startColorstr=#4CFF0000,endColorstr=#4CFF0000)"; /* IE8 */
filter: progid:DXImageTransform.Microsoft.gradient(startColorstr=#4CFF0000,endColorstr=#4CFF0000); /* IE6 & 7 */
zoom: 1;
Check this example for more
http://jsfiddle.net/epmcM/
you can generate your rgba filter from here http://kimili.com/journal/rgba-hsla-css-generator-for-internet-explorer/

Caption content's opacity not setting to 1 on slide [duplicate]

I have a paragraph element inside a div. The div has an opacity of 0.3 & the paragraph has an opacity of 1.
When I show the elements, it appears the paragraph is transparent, like it has an opacity of 0.3.
Is there a way to make the paragraph inside the div have full opacity? Maybe I can set a CSS value for this?
<div style="opacity: 0.3; background-color: red;">
<p style="opacity: 1;">abcde</p>
</div>
You can't, the opacity level is relative to the parent's opacity, always. So 1.0 inside 0.3 would be 100% of 0.3, which is 0.3, and 0.5 inside 0.3 would be 50% of 0.3 which is 0.15. If you're only using opacity for the background color, you can specify the color using the RGBA method so that the red will be opaque and not the content (and thus the paragraph inside it).
<div style="background-color: rgba(255, 0, 0, 0.3);">
<p>abcde</p>
</div>
See here.
I wanted to add this as a comment to animuson answer, but I can't post comments yet, so I'll just post it as an 'answer'. RGBa works great, but only in new browsers. Even IE8 doesn't support it, which is a serious setback, since many, MANY people still use IE8.
.color-block {
/* The Fallback Color */
background: rgb(200, 54, 54);
/* The Important Bit - Alpha Transparency */
background: rgba(200, 54, 54, 0.5);
}
Please read http://css-tricks.com/examples/RGBaSupport/ for more info.
I usually circumvent the problem entirely by using two divs. The first for the transparant background and the second for the content, positioned right over the first one. It's not neat, it's not nice, and I can't claim I'm happy with it, but... it even works in IE7 and IE6.
It's unfortunate that this doesn't work as you might expect. Other styles have a value for inherit - so why doesn't opacity?
There is a work-around if you're not doing anything too complicated:
Create a parent DIV (or other block element) with the width/height
you need and position:relative.
Create a child DIV with your transparency value, a width/height of
100% and position:absolute (possibly left/top:0 as well)
Create another child DIV with your content and the opacity set to
whatever you want.
Example:
<div style="width:200px;height:100px;position:relative">
<div style="opacity:.03;background-color:blue;width:100%;height:100%;position:absolute;left:0;top:0"></div>
<div style="opacity:.09">This is my content</div>
</div>
it's simple only you have do is to give
background: rgba(255,0,0,0.3)
& for IE use this filter
background: transparent;
-ms-filter: "progid:DXImageTransform.Microsoft.gradient(startColorstr=#4CFF0000,endColorstr=#4CFF0000)"; /* IE8 */
filter: progid:DXImageTransform.Microsoft.gradient(startColorstr=#4CFF0000,endColorstr=#4CFF0000); /* IE6 & 7 */
zoom: 1;
Check this example for more
http://jsfiddle.net/epmcM/
you can generate your rgba filter from here http://kimili.com/journal/rgba-hsla-css-generator-for-internet-explorer/

z-index and opacity issues

I'm trying to make a wrapper at the back off all of my DIV's that will appear transparent (opacity: 0.6), but everything in front of that is appearing transparent too.
Any ideas how to fix this?
You can find the example here: http://testing.squaretise.com/ (I have given the wrapper (#wrap) a red border so you can interpret easier)
Use instead of:
opacity: 0.6;
this:
background: rgba(255, 255, 255, 0.6);
The color is in RGB and the last digits are for the transparency level.
You'll need to position your transparent div absolutely.
http://www.w3.org/TR/css3-color/#transparency explains how the descendants pick up the transparency.
Opacity is inherited. If the parent is see through, so are the children.
A better way to do this is to remove opacity and set the background color to be transparent:
.foo {
background: rgba(0,0,0,.5);
}
You should use transparent background, instead of opacity.
Background-image is the best way if you want to support IE8. (CSS3 Colours: http://caniuse.com/#search=rgba)
Use data-uri for better performance.
You could even do it with opacity. Here's an example:
HTML
<div id="wrapper">
<div id="contentOrWhatever">
</div>
</div>
CSS
body {
z-index:0;
}
#wrapper {
z-index:1;
opacity:0.6;
}
#contentOrWhatever {
z-index:99;
opacity:1;
}
So #wrapper ist now transparent and is ALWAYS behind #contentOrWhatever.
Hope I could help you.

CSS: Setting background opacity without rgba

In the following code, I want to set the opacity only for the background color of the li (not the text). However, it is important NOT to use the rgba for the background.
I'm trying following, but it sets the opacity for the link text as well.
HTML:
<ul>
<li>Hello World</li>
</ul>
CSS:
body{
background: red;
}
ul{
margin: 100px;
}
li{
padding: 10px;
background: #000000;
opacity: 0.1;
}
a{
color: #fff;
font-weight: 700;
opacity: 1;
}
JSFiddle:
http://jsfiddle.net/2uJhL/
Old question, but new answer! :)
Fortunately, the new versions of Chrome and Firefox support 8 digit colors. That's really cool, especially when you're developing and testing software.
For example:
background-color: #ff0000; (Red)
If you want a opacity of 0.5, you can do this:
background-color: #ff00007f (The 7F is half of FF)
So, from now on you won't need to use the rgba() if you don't want or have the entire div fade away - because of the opacity: 0.x - when you only want the background color a little bit transparent.
But remember that not all browsers support that. So, please test the snippet below on Chrome or Firefox, ok?
Isn't that cool???
<div style="background-color: #ff00003f;">better than [opacity: 0.25]</div>
<div style="background-color: #ff00007f;">better than [opacity: 0.50]</div>
<div style="background-color: #ff0000bf;">better than [opacity: 0.75]</div>
<div style="background-color: #ff0000ff;">better than [opacity: 1.00]</div>
Source: https://css-tricks.com/8-digit-hex-codes/
You can set a PNG or GIF image as background, i.e:
li {
background-image: url('path/to/your/image.png');
}
The opacity is applied at the content and all children. You can't set a different opacity for the children.
However if you don't want to use rgba you can use a png with opacity that you want.
And setting a png to your li in the background is the best solution in this case
tl;dr Cmiiw, you can't setting the background opacity without RGBA
Let me try to give another solution.
This solution is not the real answer for the problem, but it may helps.
For me, you just need to convert the background color (hex value) to RGBA, using tools something like this https://cssgenerator.org/rgba-and-hex-color-generator.html.
Then, just use the RGBA value in your background color.

Problems with transparency in CSS

Ok so heres the deal. I have a page I'm creating in html and css. I've got a div whose background needs to be transparent.
However when I use opacity: .6; Everything in the div goes see through.
Is there any way to fix this so it works in safari, IE, and firefox?
No, there's no real way to fix this problem (though you can in CSS3). There are two possible approaches:
1) Use a transparent png background rather than doing it with CSS (with hacks for IE6 which doesn't allow transparent pngs)
2) Use two separate divs, and use absolute positioning to position one over the top of the other. This requires knowing certain dimensions, so may not always apply, but may work in your situation.
.outer {
position: relative
}
.background {
position: absolute;
top: 0;
left: 0;
width: 100%;
height: 100%;
background-color: #000; /* Or whatever */
opacity: 0.6;
-moz-opacity: 0.6;
filter: alpha(opacity=60);
}
<div class="outer">
<div class="background"></div>
Content
</div>
Note that sometimes the height: 100% rule for .background doesn't work in IE 6, in which case you should try applying hasLayout to first .outer, and if that fails to .background as well (you can add hasLayout with the CSS rule zoom: 1 without side-effect). If neither of those works, you'll likely need an expression value for IE 6. If you need further help leave a comment.
As smerriman said, it's much simpler in browsers which support CSS3 (more specifically, rgba or hsla color values). It would be as simple as background-color: rgba(0, 0, 0, 0.6).
Just use transparent image as a background for that element. When you use opacity in css for a given element, everything in that element and including that element receives that styling. Look here:
http://jsfiddle.net/zV4BR/
you should use both
opacity in css and
filter:alpha(opacity=60);
for ie and stuff
use this method
How to give cross browser transparency to element's background only?
use Rgba instead opacity. see example here: http://jsfiddle.net/ypaTH/
you will have to set background on inner elements also.
Edit: to make rgab code for IE use this http://kimili.com/journal/rgba-hsla-css-generator-for-internet-explorer/
it should be
opacity:0.6
beside that opacity works differently depending which web browser you use