'How can one create an overlay in css?

I'd like to create a div with an arbitrary size, then display something on top of that div. What is the best way to position and size the overlay exactly as the div below in css?

htmlcss


Solution 1:[1]

I'm late to the party, but if you want to do this to an arbitrary element using only CSS, without messing around with positioning, overlay divs etc., you can use an inset box shadow:

box-shadow: inset 0px 0px 0 2000px rgba(0,0,0,0.5);

This will work on any element smaller than 4000 pixels long or wide.

example: http://jsfiddle.net/jTwPc/

Solution 2:[2]

http://jsfiddle.net/55LNG/1/

CSS:

#box{
    border:1px solid black;
    position:relative;
}
#overlay{
    position:absolute;
    top:0px;
    left:0px;
    bottom:0px;
    right:0px;
    background-color:rgba(255,255,0,0.5);
}

Solution 3:[3]

Here is an overlay using a pseudo-element (eg: no need to add more markup to do it)

.box {
  background: 0 0 url(http://ianfarb.com/wp-content/uploads/2013/10/nicholas-hodag.jpg);
  width: 300px;
  height: 200px;
}

.box:after {
  content: "";
  display: block;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.4);
}
  <div class="box"></div>

Solution 4:[4]

Quick answer without seeing examples of your current HTML and CSS is to use z-index

css:

#div1 {
position: relative;
z-index: 1;
}

#div2 {
position: relative;
z-index: 2;
}

Where div2 is the overlay

Solution 5:[5]

I would suggest using css attributes to do this. You can use position:absolute to position an element on top of another.

For example:

<div id="container">
   <div id="on-top">Top!</div>
   <div id="on-bottom">Bottom!</div>
</div>

and css

#container {position:relative;}
#on-top {position:absolute; z-index:5;}
#on-bottom {position:absolute; z-index:4;}

I would take a look at this for advice: http://www.w3schools.com/cssref/pr_class_position.asp

And finally here is a jsfiddle to show you my example

http://jsfiddle.net/Wgfw6/

Solution 6:[6]

If you don't mind messing with z-index, but you want to avoid adding extra div for overlay, you can use the following approach

/* make sure ::before is positioned relative to .foo */
.foo { position: relative; }

/* overlay */
.foo::before {
    content: '';
    display: block;
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.5);
    z-index: 0;
}
/* make sure all elements inside .foo placed above overlay element */
.foo > * { z-index: 1; }

Solution 7:[7]

I was just playing around with a similar problem on codepen, this is what I did to create an overlay using a simple css markup. I created a div element with class .box applied to it. Inside this div I created two divs, one with .inner class applied to it and the other with .notext class applied to it. Both of these classes inside the .box div are initially set to display:none but when the .box is hovered over, these are made visible. 

.box{
  height:450px;
  width:450px;
  border:1px solid black;
  margin-top:50px;
  display:inline-block;
  margin-left:50px;
  transition: width 2s, height 2s;
  position:relative;
  text-align: center;
    background:url('https://upload.wikimedia.org/wikipedia/commons/c/cd/Panda_Cub_from_Wolong,_Sichuan,_China.JPG');
  background-size:cover;
  background-position:center;
  
}
.box:hover{
  width:490px;
  height:490px;
}
.inner{
  border:1px solid red;
  position:relative;
  width:100%;
  height:100%;
  top:0px;
  left:0px;
  display:none; 
  color:white;
  font-size:xx-large;
  z-index:10;
}
.box:hover > .inner{
  display:inline-block;
}
.notext{
  height:30px;
  width:30px;
  border:1px solid blue;
  position:absolute;
  top:0px;
  left:0px;
  width:100%;
  height:100%;
  display:none;
}
.box:hover > .notext{
  background-color:black;
  opacity:0.5;
  display:inline-block;
}
<div class="box">
  <div class="inner">
    <p>Panda!</p>
  </div>
  <div class="notext"></div>
</div>

Hope this helps! :) Any suggestions are welcome.

Solution 8:[8]

div{
  background-image:url('');
  background-size:cover;
  background-position:top center;
  position:relative;
}

div:before{
  content:'';
  position:absolute;
  left:0;
  top:0;
  height:100%;
  width:100%;
  background-color:rgba(0,0,0,0.7);
}

Sources

This article follows the attribution requirements of Stack Overflow and is licensed under CC BY-SA 3.0.

Source: Stack Overflow

Solution Source
Solution 1 user1002973
Solution 2 Alex
Solution 3 Dorian
Solution 4 Daniel Hunter
Solution 5 Undefined
Solution 6 Rob Zombie
Solution 7 Abhishek Singh
Solution 8 phuzi

Related Questions