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
Related
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/
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/
I'd like to create a div that is fixed in one position and make it translucent - making the contents behind it partially visible and blurred. The style I'm looking for is similar to the div of the 'See All' thumbnails in the Apple website.
The only thing I can do is adjust opacity: 0.9 but I cannot blur the contents that go under the div.
Note: The div has a fixed position and the background scrolls. The background that scolls is a mix of text and photos.
CSS
CSS 3 has a blur filter (only webkit at the moment Nov 2014):
-webkit-filter: blur(3px); /*chrome (android), safari (ios), opera*/
IE 4-9 supports a non-standard filter
filter:progid:DXImageTransform.Microsoft.Blur(PixelRadius='3')
See some nice demo for the blur and other filters here.
For future reference here is the compatibility table for CSS filter. Firefox seems to be getting the feature in v35+ while even IE11 does not seem to have any compatibility.
SVG
An alternative is using svg (safe for basically IE9 and up):
filter: url(blur.svg#blur);
SVG:
<svg version="1.1" xmlns="http://www.w3.org/2000/svg">
<filter id="blur">
<feGaussianBlur stdDeviation="3" />
</filter>
</svg>
jsFiddle Demo
Javascript
You will achieve the highest browser compatibility with javascript, but usually the slowest performance and added complexity to your js.
http://www.blurjs.com/ (jquery plugin, canvas solution so IE9+, FF, Chrome support)
http://nbartlomiej.github.io/foggy/ (jquery plugin IE8+, FF,Chrome support)
You can use CSS image filter.
-webkit-filter: blur(2px);
filter : blur(2px);
More info on CSS image filters:
http://techstream.org/Web-Design/CSS3-Image-Filters
http://html5-demos.appspot.com/static/css/filters/index.html
Demo: JSFIDDLE
But in fact, they are using pre processed JPG, and just using it as a overlay in the correct position.
#background {
position: absolute;
left: 10px;
top: 10px;
width: 600px;
height: 600px;
background-image: url(http://images.apple.com/home/images/osx_hero.jpg);
background-position: 0 0;
}
#blur {
position: absolute;
left: 50px;
top: 50px;
width: 120px;
height: 500px;
background-image: url(http://images.apple.com/home/images/osx_hero_blur.jpg);
background-position: -50px -50px;
}
<div id="background">
<div id="blur"></div>
</div>
Demo: JSFIDDLE
You made me want to try, so I did, check out the example here:
http://codepen.io/Edo_B/pen/cLbrt
Using:
HW Accelerated CSS filters
JS for class assigning and arrow key events
Images CSS Clip property
That's it.
I also believe this could be done dynamically for any screen if using canvas to copy the current dom and blurring it.
This should be coming browsers in the future as a CSS filter called backdrop-filter. There's virtually no support for it at all currently. For browser support see: http://caniuse.com/#feat=css-backdrop-filter
This CSS filter will do the frosted glass without any funny business, or hacks. It'll just do it.
Someone recorded a demo of it on Vine, and it looks really good. They were using Safari nightly to get access to the CSS filter. https://vine.co/v/OxmjlxdxKxl
Just put the same image (or parts of it) with opacity .9 a few pixels left/right/up/down - voilà
Some browsers support the new CSS property backdrop-filter. This property enables you to add a "frosted glass-like" effect on an element without using the pseudo classes.
Example:
element {
background: rgba(255, 255, 255, .5);
backdrop-filter: blur(10px);
}
https://developer.mozilla.org/en-US/docs/Web/CSS/backdrop-filter
First of all the OP states that the background scrolls. None of the available answers really allow scrolling. Based on how html is set up it is impossible. But with the use of famous/angular one can have multiple rendering engines to achieve this affect. I have it constructed here.
The idea behind it is two renderings of the site. One is the header version which is blurred. The other is the body. I used Famous/Angular and use templating to render the template in the head and body. The header needs an offset for the height of the header so that things match up. I will be having actual code posted soon here and on the site.
In my page layout I have two <div> tags. One, with id #image-panel and the other with #image-content-panel.
The two <div>s are stacked on top of each other using position: absolute. #image-content-panel (has higher z-index) is on top of #image-panel.
Both <div>s have background: transparent.
The page renders fine in Chrome, Safari, and Firefox i.e. I can see the image through the text (heading and paragraph etc.). But in IE (version 8) #image-content-panel is being redered with a white background.
You can see screenshots below:
Rendering in Crome, Safari, Mozilla
Rendering in IE 8
Relevant CSS and HTML code :
HTML Code
CSS Code
I'd like the page to render same in IE too.
Any help is appreciated.
Please propose an Alternative solution too if this can't be fixed.
UPDATE
The Jquery Cycle Plugin will add a background colour to elements in older versions of IE.
You need to set the cleartypeNoBg option to true in your Cycle initialisation.
$("#image-content-panel").cycle({
fx : 'scrollRight',
speed : 2700,
cleartypeNoBg: true
});
EDIT The below is not relevent
IE8 doesn't support rgba values and will fallback to a solid colour. If you don't define a fallback it will default to white which is what you are seeing.
There's a couple of ways to handle this.
1. Accept IE8's limitations.
#header {
z-index: 100 !important;
width: 100%;
height: 50px;
background: rgb(0,0,0);
background: rgba(0,0,0,0.6);
margin: 10px 0 0 0;
}
#header will have a solid black background in browsers that don;t support rgba. Semi opaque in browsers that do.
2.Use a filter
#header {
z-index: 100 !important;
width: 100%;
height: 50px;
background: rgba(0,0,0,0.6);
-ms-filter: "progid:DXImageTransform.Microsoft.gradient(startColorstr=#99000000, endColorstr=#99000000)"
margin: 10px 0 0 0;
}
#header will have 60% transparent black background in IE8 and proper browsers. Personally, I hate using filters. They make your markup hideous and are difficult to maintain unless you are excellent at converting rgb to hex codes in your head (which I'm not). Also, this particular filter is IE8+. It will not work in IE7, though there are other filters that will work in IE6-7. You should also probably separate this out in to an IE8 specific stylesheet or use some other method to prevent IE9 from using the filter as IE9 supports rgba.
3.Use a 1px x 1px black, semi-transparent .png
#header {
z-index: 100 !important;
width: 100%;
height: 50px;
background: url(background.png) repeat;
margin: 10px 0 0 0;
}
This is the route I usually go down simply because it's simple. It takes seconds to create a .png if you need to change the alpha and you don't need to worry about browser inconsistencies.
As others have said, IE8 doesn't support RGBA colour values.
There is a hack you can use to work around this though: I recommend trying out CSS3Pie on your site; it implements a number of modern CSS features into old versions of IE, including RGBA colours in backgrounds.
Hope that helps.
For some reason I cannot display the dropdown menu on IE when I add a z-index in the header of any number. When I remove it, it works. However the dropdown then appears behind the container and content in Firefox and Chrome. So either I take it out or leave it in, I cant seem to satisfy all browsers. So i tried making a separate IE stylesheet without the z-index but that doesnt work either. I know the separate IE CSS is working because I changed the backgrounds but it uses the dropdown menu in the master stylesheet.
Website is www.stingrayimages.ca
Thank you for your help
Edit: So lets just say i got it all to work on IE since its always IE that gives the problems. But now the dropdown menu appears behind the content on other browsers like firefox and chrome. All i did was remove the z-index in the #head div. Anyway to fix the dropdown menu without adding z-index to the head div?
Edit: I got the dropdown to work on IE9 firefox and chrome. Not IE 6, it just blew up.
#head {
position:relative;
height: 140px;
width: 100%;
background: #FFF;
filter:alpha(opacity=93);
padding-top:20px;
/* CSS3 standard */
opacity:0.93;
-moz-box-shadow: 0 0 5px black;
-webkit-box-shadow: 0 0 5px black;
box-shadow: 0 0 5px black;
z-index:1;
}
OK so I had a look and there's good news and bad ;)
the opacity filter in the #head div means that overflow: hidden is being triggered, which is why no menus (it's the unfortunate side effect of filters and overflow I'm afraid).. remove that and you can have your z-index which you need anyway
next to get the transparency (opacity) for your dropdowns you can just use rgba(255,255,255,0.9) on the #nav ul li ul rule instead of #fff; (though leave #fff before that rule for fallback for browsers that can't do rgba() yet.. read more!)
That's nearly everyone happy - now you can also do rgba() transparency for IE using the gradient filter..
so the rule I landed up with looked like this (in an IE conditional comment):
#nav ul li ul {
zoom: 1;
background: transparent;
-ms-filter: "progid:DXImageTransform.Microsoft.gradient(startColorstr=#E5FFFFFF,endColorstr=#E5FFFFFF)"; /* IE8 */
filter: progid:DXImageTransform.Microsoft.gradient(startColorstr=#E5FFFFFF,endColorstr=#E5FFFFFF); /* IE6 & 7 */
/* behavior: url(PIE.htc);*/ /* yuk filter */
}
and I thought it would be good to go..
BUT the Bad News
the behavior is commented out because you can only have one or the other, transparency or rounded corners, :( apparently
I didn't do too much research though so YMMV
I also noticed a problem or three in IE7, not sure if you want to support that but in case you do.. or want to check my final code which got it to this stage I pasted it in PasteBin
that code replaces your main CSS - the #head rule and whole /*navigation*/ section
Update: more good news and a little bad!
you can have the transparency and the rounded corners thanks to CSS3 PIE's own -pie-background property, but not the box shadow as well, the way PIE deals with box shadow means it fills the div instead of just drawing on the outside so the -pie-background reading of the rgba background is transparent but shows the grey color used for the shadow!
My solution:
I added a border to make up for loss of box-shadow, it's not looking too bad, and it's working across IE's ;)
here's an update to the I conditional comment above:
<!--[if lte IE 9]>
<style type="text/css" media="screen">
#nav ul li ul {
box-shadow: none;
-pie-background: rgba(255,255,255,0.9);
border: 3px double #eee;
border-width: 0 3px 3px 3px;
behavior: url(PIE.htc); /* yuk filter */
}
</style>
<![endif]-->
I am not sure which version of IE you are having a problem with but I tried in IE6 and IE7 and the menu system is completely broken. I don't have IE8, 9 or 10 here to test but I'll take a guess at a solution nonetheless!
If you add a z-index and position to the #container as well, it should solve your problem. z-index only applies to positioned elements.
#container {
position:relative;
z-index:0;
}
It is also worth reading Overlapping and z-index, which summarises the properties and also describes the problems when using z-index and IE.
Edit: Wow, I did not realise what was wrong until I found a machine with IE8 on it. I think you have misunderstood the standard CSS and IE specific CSS principle slightly. The IE specific CSS file(s) should only contain the properties that are different to the standard ones. Your ie-style.css file contains duplicates of all the rules and is being included for all versions of IE. IE8 is much more standards compliant than IE6/7 and you should rarely have to override CSS for that version.
So IE will have multiple copies of the same style being applied. Under normal circumstances most browsers can cope with this duplication, however one of the duplicates is the IE specific filter property.
You have filter:alpha(opacity=93); in both style.css and ie-style.css even though it should really only belong in an IE6/7 CSS file as IE8 filters work differently. If you remove the filter from both stylesheets then the menu correctly displays in IE8.
If you need the opacity to work in IE6 or IE7, I suggest creating a specific CSS file for those browsers and using conditional comments to include it just for those versions.
Have a look at this solution : http://webdemar.com/webdesign/superfish-jquery-menu-ie-z-index-bug/
Another solution that I used already is quite easy, but a pain in the *. You must all the parent container a specific lower z-index value than the one you want to show on top of the others.
Like so :
<parent>//z-index 1
<child>//zindex 2
<yourdropdown>//z-index3
Update 1
The menu didn't show correctly in my chrome so I fixed the #head z-index to 80 and it did way better. Do the following to get the layout the same in IE and Chrome and Firefox. Watch out though, I only tested those change on the homepage.
Add this to the .conbox class :
.conbox {
position:relative;
}
Place the logo correctly
#logo {
position:absolute;
left:0px;
top:0px;
}
Remove the #nav positioning
#nav {
margin-top:80px;
z-index:3;
}
The problem is, I can't even see any effect on the menu mouseover in IE!!
Setting z-index: -1 for elements that menu overlays and z index of men div resolved this problem for me.
#bodyWrapper
{
background: none repeat scroll 0 0 #E4F7FE;
overflow: hidden;
position: relative;
width: 100%;
padding: 0 0 60px;
z-index: -1;
}