I'm working on the following layout issue: the page heading is center aligned. It should have a background image on its left side, and the background should also be made semi-transparent. The heading content may be of various lengths; the positioning of the background needs to take this into account. The layout should be the same on both desktop and mobile. For example:
So far, I've been able to make the background image semitransparent and center it by using the ::after pseudo-element. The image is set as the background of the ::after, and justification on the parent also positions the background. Code so far:
.heading-bg-logo {
display: flex;
justify-content: center;
color: blue;
}
.heading-bg-logo::after {
content: "";
display: inline-block;
width: 1em;
height: 1em;
background: url(https://images.unsplash.com/photo-1581079289196-67865ea83118?ixlib=rb-1.2.1&ixid=MnwxMjA3fDB8MHxwaG90by1wYWdlfHx8fGVufDB8fHx8&auto=format&fit=crop&w=120&q=80);
background-repeat: no-repeat;
background-size: 100%;
position: absolute;
z-index: -1;
opacity: 0.2;
}
<h2 class="heading-bg-logo">
Test Heading
</h2>
The issue at this point is that the logo positioned in the center behind the heading, rather than the left side of the heading text. How can I position it on the left side of the content?
Second Issue which i have is that the Logo Size should be customizable.
Note: I've used a demo image here from Unsplash.
Background sizing and positioning by themselves shouldn't require more than background properties on the element itself. As long as you can get the content box to shrink to fit the content, background-origin can be used to position the background relative to the content box (or the padding box, if you want the background to extend beyond the content box). However, requiring additional transparency on the background steers this towards a pseudo-element.
An alternative to a pseudo-element that can be used in certain circumstances is to use an inset box-shadow with a partially transparent color to wash-out the image. This only works if the background image is on top of a solid color; the same color is then used as the box-shadow color. Note the transparency of the box-shadow is the inverse of the transparency for the image: the more "transparent" the background is supposed to be, the less transparent the box-shadow color.
The other tricky aspect is in how you shrinkwrap the content. The simplest is to use a width of fit-content, though it's not supported in older browsers:
.heading-bg-logo {
color: blue;
width: fit-content;
margin: auto;
padding: 0 0.5em;
/* The spread-radius needs to be large enough to cover the background */
box-shadow: 0 0 0 1000px inset rgba(255, 255, 255, 0.8);
background: url("https://images.unsplash.com/photo-1581079289196-67865ea83118?ixlib=rb-1.2.1&ixid=MnwxMjA3fDB8MHxwaG90by1wYWdlfHx8fGVufDB8fHx8&auto=format&fit=crop&w=3269&q=80");
background-origin: padding-box;
background-repeat: no-repeat;
background-size: contain;
}
<span>content before</span>
<h2 class="heading-bg-logo">Test Heading</h2>
<span>content after</span>
Note that a content-size of contain is used with the sample image to scale it to fit within the element without distorting the aspect ratio.
If using a pseudo-element to achieve semitransparency, then you can position it relative to the content using the usual approach: relatively position the parent element and absolutely position the pseudo-element:
.heading-bg-logo {
color: blue;
width: fit-content;
margin: auto;
position: relative;
}
.heading-bg-logo::after {
content: " ";
opacity: 0.2;
background: url("https://images.unsplash.com/photo-1581079289196-67865ea83118?ixlib=rb-1.2.1&ixid=MnwxMjA3fDB8MHxwaG90by1wYWdlfHx8fGVufDB8fHx8&auto=format&fit=crop&w=3269&q=80");
background-repeat: no-repeat;
background-size: contain;
position: absolute;
top: 0;
left: -0.5em;
height: 100%;
width: 100%;
z-index: -1;
}
<span>content before</span>
<h2 class="heading-bg-logo">Test Heading</h2>
<span>content after</span>
Fast fix. Add margin-right: 150px; to your .heading-bg-logo::after class.
Update (responsive behavior)
.c {
display: flex;
justify-content: center;
align-items: center;
}
.c h2 {
color: blue;
}
.heading-bg-logo {
position: relative;
}
.heading-bg-logo::after {
position: absolute;
top:-20px;
content: "";
margin-left: -80px;
width: 120px;
height: 40px;
background: url(https://images.unsplash.com/photo-1581079289196-67865ea83118?ixlib=rb-1.2.1&ixid=MnwxMjA3fDB8MHxwaG90by1wYWdlfHx8fGVufDB8fHx8&auto=format&fit=crop&w=3269&q=80);
background-repeat: no-repeat;
background-size: 100% 95%;
z-index: -1;
opacity: 0.2;
}
<div class="c">
<div class="heading-bg-logo"></div>
<div>
<h2>Test Heading Test Heading</h2>
</div>
</div>
<div class="c">
<div class="heading-bg-logo"></div>
<h2>Test Heading </h2>
</div>
.heading-bg-logo {
display: flex;
justify-content: center;
color: blue;
}
.heading-bg-logo::after {
content: "";
display: inline-block;
width: 120px;
height: 40px;
margin-right: 150px;
background: url(https://images.unsplash.com/photo-1581079289196-67865ea83118?ixlib=rb-1.2.1&ixid=MnwxMjA3fDB8MHxwaG90by1wYWdlfHx8fGVufDB8fHx8&auto=format&fit=crop&w=3269&q=80);
background-repeat: no-repeat;
background-size: 100% 95%;
position: absolute;
z-index: -1;
opacity: 0.2;
}
<h2 class="heading-bg-logo">
Test Heading
</h2>
I have a DIV that change his color when mouse over
I want to change the image inside the div when mouse over the div, not over the necessarily on the image
In the HTML
<div class="about">
<img class="about-project1">
CSS
.about-project1 {
width: 121px;
height: 42px;
background: url("img/coching.png") no-repeat;
border: 0px;
}
.about:hover h3 {
color: #fff;
}
.about a about-project1:hover {
background: url("img/coching_white.png") no-repeat;
}
Another thing is that the image appears with border although i tell border:0
why ?
10x very much
Udi
The following code will do what you want:
HTML
<div class="about">
<div class="about-project1"/>
</div>
CSS
.about-project1 {
width: 121px;
height: 42px;
background: url("https://www.gstatic.com/webp/gallery3/1.sm.png") no-repeat;
}
.about:hover h3 {
color: #fff;
}
.about:hover .about-project1 {
background: url("https://www.gstatic.com/webp/gallery/4.sm.jpg") no-repeat;
}
Finally, your image had a border because it was an img element with no src attribute, I changed the original code to use a div instead.
Fiddle is here
How do I set the opacity of a div background without affecting the text in hero-text? Right now hero-text inherits the opacity of ion-slide.
<style>
.slider {
height: 100%;
width: 100%;
}
.slide {
background-size: cover;
}
#one {
background: url(img/walkthrough-1.png) no-repeat;
opacity: 0.5;
}
#two {
background: url(img/walkthrough-2.png) no-repeat;
}
#three {
background: url(img/walkthrough-3.png) no-repeat;
}
.splash {
bottom: 0px;
}
.hero-text {
}
</style>
<ion-content class="splash" scroll="false">
<ion-slide-box on-slide-changed="slideHasChanged($index)">
<ion-slide id="one"><div class="hero-text">Test</div></ion-slide>
</ion-slide-box>
</ion-content>
If you need to only adjust the opacity of <ion slide id="xxx"> then I recommend breaking your .hero-text div out and adjusting your styling as necessary to keep your design correct.
With CSS you can adjust the opacity of a background color -- background-color: rgba(0, 0, 0, 0.5) -- which will create a 50% opaque black background color and not affect any children elements. But if you want to reduce the opaqueness of a background image then your only means are to use opacity which will of course affect children.
I used the same concept on a website that also used a "hero image" and I wanted the background image to fade in/out without affecting any text. You may need to use the following CSS to properly place everything:
.hero-wrapper {
position: relative;
}
.hero-wrapper > .bg {
background: ...;
position: absolute;
top: 0;
left: 0;
height: 100%;
width: 100%;
z-index: 0;
}
.hero-wrapper > .text {
position: relative;
z-index: 10;
}
This should work, although it was freehand. Let me know if you want me to explain this anymore or provide a working example. Cheers ~
Edit
Here is a working example of my recommendation via Plnkr :)
Plnkr Demo
I want to add background-color to a div, and on the same div, on the bottom i want background-image. But when background-image begins, I want background-color to stop. Here is a image as example:
Here is an example using pure CSS - no image needed. Only one div is required to achieve this - no need for two!
You can apply whatever background-color you want without having to worry about it not being applied to the image.
Try changing the background-color in the demo!
jsFiddle demo
HTML
<div class="arrow">BUTTON</div>
CSS
.arrow {
position: relative;
background: #000000;
width:100px;
height:50px;
color:white;
}
.arrow:after {
top: 100%;
border: solid transparent;
content: " ";
height: 0;
width: 0;
position: absolute;
pointer-events: none;
}
.arrow:after {
border-color: rgba(0, 0, 0, 0);
border-top-color: #000000;
border-width: 10px;
left: 50%;
margin-left: -10px;
}
Use nested divs:
<div class="button">
Text
<div class="arrow">
</div>
</div>
and
.button {
background-color: black;
}
.arrow {
background-image: ...
}
Of course you will have to adjust the positioning of the arrow image in the CSS, too.
Alternatively you could use :after to insert a pseudo element to represent the arrow.
I solved it with CSS, using 2 background images.
I made an illustration to be easier to understand:
background-image: url(http://www.yoursite.com/top_image.png), url(http://www.yoursite.com/bottom_image.png);
background-repeat: repeat-x, no-repeat;
background-position: left top, center top;
I want to achieve this using html and css:
I have tried to set the opacity of the container to 0.3 and the box to 1, but it doesn't work: both divs have 0.3 opacity.
jsFiddle of my try here
The effect I am trying to achive is a popup box that comes on top of the page. It is highlighted by fading the content below (by lowering the opacity).
You can use opacity in combination with background color, like this:
#container {
border: solid gold 1px;
width: 400px;
height: 200px;
background:rgba(56,255,255,0.1);
}
#box {
border: solid silver 1px;
margin: 10px;
width: 300px;
height: 100px;
background:rgba(205,206,255,0.1);
}
<div id="container">
containter text
<div id="box">
box text
</div>
</div>
Live demo
As far as I know you can't do it in a simple way. There a couple of options here:
Use absolute positioning to position box "inside" the container.
#container {
opacity: 0.3;
background-color: #777788;
position: absolute;
top: 100px;
left: 100px;
height: 150px;
width: 300px;
}
#box {
opacity: 1;
background-color: #ffffff;
position: absolute;
top: 110px;
left: 110px;
height: 130px;
width: 270px;
}
<div id="container"></div>
<div id="box">
<p>Something in here</p>
</div>
Use Javascript - almost the same as above, but position and size don't have to be hardcoded.
You can't apply an opacity property without affecting a child element!
"Opacity applies to the element as a whole, including its contents, even though the value is not inherited by child elements. Thus, the element and its children all have the same opacity relative to the element's background, even if they have different opacities relative to one another... If you do not want to apply opacity to child elements, use the background property instead." https://developer.mozilla.org/en-US/docs/Web/CSS/opacity
If you want the opacity to be applied only to the background, without affecting the child elements, use:
background-color: rgba(255, 255, 255, .3)
However, you can achieve the desired effect if you place them inside a div parent element and use CSS position property:
.parent {
border: solid green 3px;
position: relative;
width: 400px;
height: 200px;
}
.sibling-one {
border: solid red 3px;
position: absolute;
box-sizing: border-box;
width: 400px;
height: 200px;
opacity: .3;
}
.sibling-two {
border: solid blue 1px;
margin: 10px;
width: 200px;
height: 100px;
position: absolute;
transform: translateY(50%);
}
<div class="parent">
<div class="sibling-one">
<p>A sibling's one element</p>
</div>
<div class="sibling-two">
<p>A sibling's two element</p>
</div>
</div>
Try using rgba as a 'pre content' overlay to your image, its a good way to keep things responsive and for none of the other elements to be effected.
header #inner_header_post_thumb {
background-position: center;
background-size: cover;
position: relative;
background-image: url(https://images.pexels.com/photos/730480/pexels-photo-730480.jpeg?w=1260&h=750&auto=compress&cs=tinysrgb);
border-bottom: 4px solid #222;
}
header #inner_header_post_thumb .dark_overlay {
position: relative;
left: 0;
top: 0;
right: 0;
bottom: 0;
background-color: rgba(0, 0, 0, 0.75);
}
header #inner_header_post_thumb .dark_overlay .container .header-txt {
padding-top: 220px;
padding-bottom: 220px;
color: #ffffff;
text-align:center;
}
header #inner_header_post_thumb .dark_overlay .container .header-txt h1 {
font-size: 40px;
color: #ffffff;
}
header #inner_header_post_thumb .dark_overlay .container .header-txt h3 {
font-size: 24px;
color: #ffffff;
font-weight: 300;
}
header #inner_header_post_thumb .dark_overlay .container .header-txt p {
font-size: 18px;
font-weight: 300;
}
header #inner_header_post_thumb .dark_overlay .container .header-txt p strong {
font-weight: 700;
}
<header>
<div id="inner_header_post_thumb">
<div class="dark_overlay">
<div class="container">
<div class="row header-txt">
<div class="col-xs-12 col-sm-12">
<h1>Title On Dark A Underlay</h1>
<h3>Have a dark background image overlay without affecting other elements</h3>
<p>No longer any need to re-save backgrounds as .png ... <strong>Awesome</strong></p>
</div>
</div>
</div>
</div>
</div>
</header>
See a working codepen here
Using background-color: rgba(#777788, 0.3); instead of opacity could maybe fix the problem.
Apply this css rule
.alpha60 {
/* Fallback for web browsers that doesn't support RGBa */
background: rgb(0, 0, 0);
/* RGBa with 0.6 opacity */
background: 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)";
}
In addition to this, you have to declare background: transparent for IE web browsers.
For more details visit the following link:
http://robertnyman.com/2010/01/11/css-background-transparency-without-affecting-child-elements-through-rgba-and-filters/
Any child of an element with opacity set will take on that opacity.
To achieve this style you could use rgba colours and filters for IE for the background, and opacity on the textual elements. So long as the second box isn't a child of one of the text elements, then it won't inherit the opacity.
Another workaround is to simply use an overlay background to create a similar effect.
I personally like a black overlay with about a 65% opacity, but for what you are trying to do you may want to use a white overlay at round 70%.
Create a small (100 x 100 or less) PNG in Photoshop or GIMP that has the color and opacity you want. Then just set that as the background of your light box.
If you create multiple PNGs at different opacities you can easily switch between them with JS or dynamically at load via backend scripting.
It's not technically what you are trying to do, but aesthetically it can give a very similar effect and UX wise accomplishes the same thing. It is also very easy to do, and widely supported across pretty much everything.
Opacity will always inherits by the child element regardless whatever the element in there, there is no workaround up to today have suggested, when the moving of the child element outside the transparency background is not an option like in a popup menu/dialog box creation, use of background with the rgba is the solution.
Here is a input box that i created that i can turn on or off with the class property invisible by javascript
<div id="blackout" class="invisible">
<div id="middlebox">
<p>Enter the field name: </p>
<input type="text" id="fieldvalue" />
<input type="button" value="OK" id="addfname" />
</div>
</div>
CSS
#blackout {
z-index: 9999;
background: rgba(200, 200, 200, 0.6);
height: 100%;
width: 100%;
display: block;
padding: 0px;
clear: both;
float: left;
position: absolute;
margin-top: -10px;
margin-right: 0px;
margin-bottom: 0px;
margin-left: -10px;
}
#blackout #middlebox {
border: thick solid #333;
margin: 0px;
height: 150px;
width: 300px;
background-color: #FFF;
top: 50%;
left: 50%;
position: absolute;
-ms-transform: translate(-50%, -50%);
transform: translate(-50%, -50%);
padding: 10px 50px 0px 50px;
}
#middlebox p {
float: left;
width:100%;
clear:both;
}
#middlebox input {
clear:both;
margin-bottom:10px;
}
#middlebox input[type=text]{
width:100%;
}
#middlebox input[type=button]{
float:right;
width:30%;
}
.invisible{
visibility:hidden !important;
}
Use such elements that you can add :before or :after. My solution
<div class="container">
<div>
Inside of container element is not effected by opacity.
</div>
</div>
Css.
.container{
position: relative;
}
.container::before{
content: '';
height: 100%;
width: 100%;
position: absolute;
background-color: #000000;
opacity: .25
}
This might not be the most orthodox method but you can use a small semi-transparent background image for each div / container that repeats. It does seem that in this day and age you should be able to achieve this in pure (simple not hackish) css with no js but as the answers above show it isn't that straight forward...
Using a tiled image might seem dated but will work no worries across all browsers.
You can add a container's sibling absolutely positioned behind container, with the same size, and apply opacity to it.
And use no background on your container.
Now container's children have no opaque parent and the problem vanishes.