How to make a transparent background without background image? - html

I would like a div to have a transparent background.
I tried to do this using background-color and opacity, but the problem is that the border and the text inside become also transparent. Example here.
Is this possible to achieve this without using transparent PNG background image ?

If you just want the color of the background to be transparent and not the child content, use
background-color: rgba(0,0,0,.5); // Sets to 50% transparent
See this page for more details - it's a css3 spec so won't show up in every browser:
http://www.css3.info/introduction-opacity-rgba/

Yes.
Set
background-color: transparent;
and do not use opacity, as that is what makes semi-transparent the whole div..
updated your example at http://jsfiddle.net/eU7By/1/
UPDATE after comments
you can use rgba for the background-color as #DHuntrods mentions. IE needs some tweaking of'course.. http://leaverou.me/2009/02/bulletproof-cross-browser-rgba-backgrounds/

The most cross-browser solution is to use the opacity property on an additional "absolutely positioned" child element (in a relatively or absolutely positioned parent): it only there to contain the colored transparent background.
Then you can use the opacity property to make this element transparent. Since this element has no children, the opacity will not affect any other element.
Opacity is an IE5+ property, just use (see http://css-tricks.com/snippets/css/cross-browser-opacity/):
-ms-filter: "progid:DXImageTransform.Microsoft.Alpha(Opacity=50)"; /* IE 8 */
filter: alpha(opacity=50); /* IE 5-7 */
-moz-opacity: 0.5; /* Netscape */
-khtml-opacity: 0.5; /* Safari 1.x */
opacity: 0.5; /* Good browsers */
see the jsFiddle example http://jsfiddle.net/DUjzX/1/
The whole code looks like:
The HTML:
<div class="my-cool-wrapper">
<div class="text-and-images-on-top">
<p>Here some content (text AND images) "on top of the transparent background"</p>
<img src="http://i.imgur.com/LnnghmF.gif">
</div>
<div class="transparent-background">
</div>
</div>
The CSS:
.my-cool-wrapper {
position: relative;
}
.my-cool-wrapper .text-and-images-on-top {
padding: 10px 15px 19px 15px;
z-index: 1;
position: relative; /* needed to enable the z-index */
}
.my-cool-wrapper .transparent-background {
position: absolute;
top: 0;
width: 100%;
height: 100%;
-ms-filter: "progid:DXImageTransform.Microsoft.Alpha(Opacity=10)"; /* IE 8 */
filter: alpha(opacity=10); /* IE 5-7 */
-moz-opacity: 0.1; /* Netscape */
-khtml-opacity: 0.1; /* Safari 1.x */
opacity: 0.1; /* Good browsers */
background-color: blue;
}
read more:
Set opacity of background image without affecting child elements
Screenshots proofs
ps: I did not add the screenshots for Chrome, Firefox & Safari since these are much "better" browsers... trust me, it works for them too.

I had to use a 30x30 transparent gif as a background.
background:url('absolute path here');

A very simple CSS method to have a clear transparent background in html is this code.
background: rgba(0, 0, 0, 0.6)!important;

Related

how to do a transparency gradient on an element in css?

Is there any possible way or workaround that I can fade an element from 100% to 0% opacity top to bottom? Similar to a linear gradient background, but transparency on the element itself (not the background color).
The idea is that on the hover state, it would brighten up, and when clicked, move up to the spot of the active popup
There are alot of online css generators why don't you use that.
Here is a help link for you, go there and generate your desired Gradient.
http://www.colorzilla.com/gradient-editor/
ok, I see two different types of transparency, the first one is a alpha css just like that:
div {
opacity: 0.5;
filter: alpha(opacity=50);
}
this style made transparent the entired div (Custom sharing dialogue) and the other css that creates a linear gradient style on the button of the page:
#bottom_fade { z-index: 99;
position: fixed;
bottom: 0%;
background-image: url("bottom-fade.png");
/*in your case use a grey image with transparency*/
}
or you can use a div that covers all the button of your pages and add a linear-gradient:
#grad {
background: red; /* For browsers that do not support gradients */
background: -webkit-linear-gradient(red, yellow);
/* For Safari 5.1 to 6.0 */
background: -o-linear-gradient(red, yellow);
/* For Opera 11.1 to 12.0 */
background: -moz-linear-gradient(red, yellow);
/* For Firefox 3.6 to 15 */
background: linear-gradient(red, yellow); /* Standard syntax */
}
hopefully this snippets helps you, regards.

Prevent IE8 from making content transparent

I have a div with its individual CSS for IE8, it is transparent. How can I prevent IE8 from making content inside this div also transparent? It should be 100% visible and not transparent. Thanks so much for suggestions.
Fiddle (to be watched at in IE8)
.mybox {
position: absolute;
top: 362px;
left: 0;
width: 460px;
height:94px;
overflow: hidden;
text-align: left;
padding-left: 10px;
padding-top: 3px;
overflow:hidden;
background-color:#000000;
/* background: transparent; */
-ms-filter: "alpha(opacity=60)";
/* zoom:1 ; */
/* -ms-filter: "progid:DXImageTransform.Microsoft.gradient(startColorstr=#99000000, endColorstr=#99000000)"; */
/* -ms-filter: "progid:DXImageTransform.Microsoft.Alpha(Opacity=50)"; */
/*filter: alpha(opacity=60);*/
}
OT: Ok I know this is kind of old school. But still my customer wants this page to be compatible with IE8.
Related resources:
2
3
4
Opacity in inherited to all children, by design. New browsers can use alpha-channel (RGBA) to get around this, IE8 cannot.
All you can really do is use absolute-positioning to place the content you want visible over-top of the transparent bits. You of course need to rearrange the element stacking order to do this.
You can cheat by making a copy of the contents, minus the transparent element, and placing it over top of the existing element using JS.
If the div has the class called .mybox then try and definitively set the opacity perhaps by adding opacity: 1;
Finally, I found an even better solution:
.mybox {
background:none transparent scroll repeat 0 0;
filter:progid:DXImageTransform.Microsoft.gradient(startColorStr=#98000000,endColorStr=#98000000);
}
UPDATED: Take a look with IE8
I obviously messed up something with the filter declaration, I am sorry about that... :(

Add opacity to background image

I have set background color and background image for a div. How can I add the opacity to background image so that the background color become visible too?
Here's my code:
CSS:
.box{
background-color: green;
background-image: url('http://farm8.staticflickr.com/7308/12305815623_3d1614042a_n.jpg');
background-repeat: no-repeat;
font-size: 40px;
width: 320px;
height: 200px;
}
HTML:
<div class="box">
<div class="wrap">Some text</div>
</div>
Demo:
http://jsfiddle.net/Yv6T3/
I would suggest a partially transparent PNG is the best solution. It doesn't require any hacks, works on all platforms and degrades nicely even on IE6
There's a several CSS properties for adding opacity:
opacity: 0.2; /* Standard property, for all modern browsers */
filter: alpha(opacity=20); /* For old IE */
Look at the updated fiddle: http://jsfiddle.net/Yv6T3/1/
have been asked already and the answer is pretty nice: How do I give text or an image a transparent background using CSS?
just use
background-color:rgba(255,0,0,0.5);
where 0.5 is your transparency.
Of course, doesn't work everywhere, but for sure does in all modern browsers.

Layer one DIV over another to provide a transparent background with strong text

What I want to do is have a div with a transparent background that doesn't affect the text. Consider the following HTML:
<section class="content">
<header>
<h1>Description</h1>
</header>
Code
</section>
If I were to give it the following CSS:
background-color: #7ac0da;
opacity: 0.5;
filter: alpha(opacity=50);
The text would suffer from the transparency of the section. So, I started trying to layer the content like this:
<div class="code-sample">
<div class="background"></div>
<section class="content">
<header>
<h1>Description</h1>
</header>
Code
</section>
</div>
However, with an enumerable number of iterations I'm unable to get the section to layer over the div. I'll be honest, I've tried positioning the inner div and section absolute and relative. I've tried using the z-index. But really, I'm just shooting in the dark here. I'd like the .background to have a transparent look:
background-color: #7ac0da;
opacity: 0.5;
filter: alpha(opacity=50);
but yet the .content then overlay that div. This will allow me to then float the .code-sample div and do like a three-column layout with those.
How can I achieve what I'm looking for?
Use RGB color to only set the transparency for the background:
.class {
/* Fallback for web browsers that don't support RGBa */
background-color: rgb(0, 0, 0);
/* RGBa with 0.6 opacity */
background-color: rgba(0, 0, 0, 0.6);
/* For IE 5.5 - 7*/
filter:progid:DXImageTransform.Microsoft.gradient(startColorstr=#99000000, endColorstr=#99000000);
/* For IE 8*/
-ms-filter: "progid:DXImageTransform.Microsoft.gradient(startColorstr=#99000000, endColorstr=#99000000)";
}
Source
No need for the extra background div, use RGBA values on .section to get a semi-transparent background which doesn't affect child elements
.content {
background: rgba(0, 0, 0, 0.2)
}
Using RGBa sometimes gives rough edges in texts in Firefox. So it may be better in some cases to use semi-transparent png as background (may use data-uri).

Apply opacity to an element in CSS

I have a div element named signup-box and I want to have an opacity value of 0.65 applied to it, But there appears to be a side affect to doing so. For some reason it is getting applied to everything within that div as well. For instance, my white text wont show up white and also the inputs aren't white. What can I do to keep the transparent effect without losing the design aspects I want to keep? http://jsfiddle.net/HKy3F/5/
This is the behavior of the opacity property (it applies to everything in that element). If you only want to apply the opacity to the background only, then you'll need to either create an image with a 65% transparent black box, or you can use the CSS3 colors RGBA function to generate the color black at 65% opacity (doesn't work with IE < 9).
background: rgba(0, 0, 0, 0.6);
Which produces this jdFiddle. Hope that's what you were looking for.
check this out , that should answer you question , use background rgba instead of opacity on your box.
http://jsfiddle.net/camus/Xb5TU/
#signup-box {
height: 330px;
width: 350px;
background-color: rgba(0,0,0,0.65);
border-radius: 8px;
}
An easy way would be to create a small png file with the transparency you need and set it as background of the parent element. This will be good for all browsers :)
Have you tried using 2 divs - one for the background and one for the content?
In my example, I have a the background color #ffffff at 65% opacity.
Here is the CSS:
body { background:#000000 ;
margin:auto ;
padding:15px ;
}
#divA { background:#ffffff ; /* this is your background */
/* IE 8 */
-ms-filter: "progid:DXImageTransform.Microsoft.Alpha(Opacity=65)";
/* IE 5-7 */
filter: alpha(opacity=65);
/* Netscape */
-moz-opacity: 0.65;
/* Safari 1.x */
-khtml-opacity: 0.65;
/* Good browsers */
opacity: 0.65;
display:block ;
width:300px ;
height:300px ;
margin:auto ;
z-index:1 ;
}
#divB { display:block ; /* this is where your content goes */
padding:20px ;
width:250px ;
height:260px ;
text-align:center ;
color:#C00 ;
font-family:Arial, Helvetica, sans-serif ;
font-size:24px ;
text-align:center ;
margin:auto ;
z-index:5000 ;
}
and here is the HTML that implements it:
‹div id="divA"›
‹div id="divB"›text goes here‹/div›
‹/div›
It works in IE7, IE8, IE9, FF, Opera, Safari, and Chrome
Good luck!
Cynthia