X close button only using css

Problem

How to make a cross (X) only in css3, to use as a close button ?

I've been searching since long time, i cannot found how.... When i look at source code on website using it, there's always something weird which make the code i take unusable.

The X button i want : http://tympanus.net/Tutorials/ThumbnailGridExpandingPreview/

When you click an image, this is the cross on the right.

I think this would be great if somebody can post a simple universal css code to make a simple X cross in css3

Thx

Problem courtesy of: hedi

Solution

main point you are looking for is

tag-remove:before {
content: 'x'; // here is your X(cross) sign.
color: #fff;
font-weight: 300;
font-family: Arial, sans-serif;
}

remaings you can make it by yourself very easily.
EDIT:

<!DOCTYPE html>
<html>
<head>
<style> 
#mdiv
{
width:25px;
height:25px;
background-color:red;
border:1px solid black;
}
.mdiv
{
height:25px;
width:2px;
margin-left:12px;
background-color:black;
transform: rotate(45deg);
-ms-transform: rotate(45deg); /* IE 9 */
-webkit-transform: rotate(45deg); /* Safari and Chrome */
Z-index:1;

}
.md
{
height:25px;
width:2px;

background-color:black;
transform: rotate(90deg);
-ms-transform: rotate(90deg); /* IE 9 */
-webkit-transform: rotate(90deg); /* Safari and Chrome */
Z-index:2;

}
</style>
</head>
<body>

<div id="mdiv" >
<div class="mdiv">
<div class="md">
</div>
</div>

<div>

</body>

Solution courtesy of: Yup

Discussion

<svg viewPort="0 0 12 12" version="1.1"
     xmlns="http://www.w3.org/2000/svg">
    <line x1="1" y1="11" 
          x2="11" y2="1" 
          stroke="black" 
          stroke-width="2"/>
    <line x1="1" y1="1" 
          x2="11" y2="11" 
          stroke="black" 
          stroke-width="2"/>
</svg>

Discussion courtesy of: YangMingYuan

Here's some variety for you with several sizes and hover animations.. demo(link)

enter image description here

<ul>
  <li>Large</li>
  <li>Medium</li>
  <li>Small</li>
  <li>Switch</li>
</ul>

<ul>
  <li class="ele">
    <div class="x large"><b></b><b></b><b></b><b></b></div>
    <div class="x spin large"><b></b><b></b><b></b><b></b></div>
    <div class="x spin large slow"><b></b><b></b><b></b><b></b></div>
    <div class="x flop large"><b></b><b></b><b></b><b></b></div>
    <div class="x t large"><b></b><b></b><b></b><b></b></div>
    <div class="x shift large"><b></b><b></b><b></b><b></b></div>
  </li>
  <li class="ele">
    <div class="x medium"><b></b><b></b><b></b><b></b></div>
    <div class="x spin medium"><b></b><b></b><b></b><b></b></div>
    <div class="x spin medium slow"><b></b><b></b><b></b><b></b></div>
    <div class="x flop medium"><b></b><b></b><b></b><b></b></div>
    <div class="x t medium"><b></b><b></b><b></b><b></b></div>
    <div class="x shift medium"><b></b><b></b><b></b><b></b></div>

  </li>
  <li class="ele">
    <div class="x small"><b></b><b></b><b></b><b></b></div>
    <div class="x spin small"><b></b><b></b><b></b><b></b></div>
    <div class="x spin small slow"><b></b><b></b><b></b><b></b></div>
    <div class="x flop small"><b></b><b></b><b></b><b></b></div>
    <div class="x t small"><b></b><b></b><b></b><b></b></div>
    <div class="x shift small"><b></b><b></b><b></b><b></b></div>
    <div class="x small grow"><b></b><b></b><b></b><b></b></div>

  </li>
  <li class="ele">
    <div class="x switch"><b></b><b></b><b></b><b></b></div>
  </li>
</ul>

css

.ele div.x {
-webkit-transition-duration:0.5s;
  transition-duration:0.5s;
}

.ele div.x.slow {
-webkit-transition-duration:1s;
  transition-duration:1s;
}

ul { list-style:none;float:left;display:block;width:100%; }
li { display:inline;width:25%;float:left; }
.ele { width:25%;display:inline; }
.x {
  float:left;
  position:relative;
  margin:0;
  padding:0;
  overflow:hidden;
  background:#CCC;
  border-radius:2px;
  border:solid 2px #FFF;
  transition: all .3s ease-out;
  cursor:pointer;
}
.x.large { 
  width:30px;
  height:30px;
}

.x.medium {
  width:20px;
  height:20px;
}

.x.small {
  width:10px;
  height:10px;
}

.x.switch {
  width:15px;
  height:15px;
}
.x.grow {

}

.x.spin:hover{
  background:#BB3333;
  transform: rotate(180deg);
}
.x.flop:hover{
  background:#BB3333;
  transform: rotate(90deg);
}
.x.t:hover{
  background:#BB3333;
  transform: rotate(45deg);
}
.x.shift:hover{
  background:#BB3333;
}

.x b{
  display:block;
  position:absolute;
  height:0;
  width:0;
  padding:0;
  margin:0;
}
.x.small b {
  border:solid 5px rgba(255,255,255,0);
}
.x.medium b {
  border:solid 10px rgba(255,255,255,0);
}
.x.large b {
  border:solid 15px rgba(255,255,255,0);
}
.x.switch b {
  border:solid 10px rgba(255,255,255,0);
}

.x b:nth-child(1){
  border-top-color:#FFF;
  top:-2px;
}
.x b:nth-child(2){
  border-left-color:#FFF;
  left:-2px;
}
.x b:nth-child(3){
  border-bottom-color:#FFF;
  bottom:-2px;
}
.x b:nth-child(4){
  border-right-color:#FFF;
  right:-2px;
}
Discussion courtesy of: davidcondrey

As a pure CSS solution for the close or 'times' symbol you can use the ISO code with the content property. I often use this for :after or :before pseudo selectors.

The content code is \00d7.

Example

div:after{
  display: inline-block;
  content: "\00d7"; /* This will render the 'X' */
}

You can then style and position the pseudo selector in any way you want. Hope this helps someone :).

Discussion courtesy of: andycrone

This recipe can be found in it's original form on Stack Over Flow.