Html – CSS full screen div with text in the middle

csshtmlwebkit

I have a css class defined so I can make a div to use all the browser's viewport, the rule is the following:

.fullscreenDiv {
    background-color: #e8e8e8;
    width: 100%;
    height: auto;
    bottom: 0px;
    top: 0px;
    left: 0;
    position: absolute;
}

Now I want the text inside the div to be in the exact center of the screen so, vertical align center and horizontal align middle, but I can't seem to find the proper way to do so.

It only needs to work on webkit based browsers.

I already tried to add a P element inside with display set to table-cell (a common way of centering text) without luck.

Any suggestions?

Best Solution

The accepted answer works, but if:

you don't know the content's dimensions
the content is dynamic
you want to be future proof

use this:

.centered {
  position: fixed; /* or absolute */
  top: 50%;
  left: 50%;
  /* bring your own prefixes */
  transform: translate(-50%, -50%);
}

More information about centering content in this excellent CSS-Tricks article.

Also, if you don't need to support old browsers: a flex-box makes this a piece of cake:

.center{
    height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
}

Another great guide about flexboxs from CSS Tricks; http://css-tricks.com/snippets/css/a-guide-to-flexbox/

2015 update: the flexbox approach

There are two other answers briefly mentioning flexbox; however, that was more than two years ago, and they don't provide any examples. The specification for flexbox has definitely settled now.

Note: Though CSS Flexible Boxes Layout specification is at the Candidate Recommendation stage, not all browsers have implemented it. WebKit implementation must be prefixed with -webkit-; Internet Explorer implements an old version of the spec, prefixed with -ms-; Opera 12.10 implements the latest version of the spec, unprefixed. See the compatibility table on each property for an up-to-date compatibility status.

(taken from https://developer.mozilla.org/en-US/docs/Web/Guide/CSS/Flexible_boxes)

All major browsers and IE11+ support Flexbox. For IE 10 or older, you can use the FlexieJS shim.

To check current support you can also see here: http://caniuse.com/#feat=flexbox

Working example

With flexbox you can easily switch between any of your rows or columns either having fixed dimensions, content-sized dimensions or remaining-space dimensions. In my example I have set the header to snap to its content (as per the OPs question), I've added a footer to show how to add a fixed-height region and then set the content area to fill up the remaining space.

html,
body {
  height: 100%;
  margin: 0;
}

.box {
  display: flex;
  flex-flow: column;
  height: 100%;
}

.box .row {
  border: 1px dotted grey;
}

.box .row.header {
  flex: 0 1 auto;
  /* The above is shorthand for:
  flex-grow: 0,
  flex-shrink: 1,
  flex-basis: auto
  */
}

.box .row.content {
  flex: 1 1 auto;
}

.box .row.footer {
  flex: 0 1 40px;
}

<!-- Obviously, you could use HTML5 tags like `header`, `footer` and `section` -->

<div class="box">
  <div class="row header">
    <p><b>header</b>
      <br />
      <br />(sized to content)</p>
  </div>
  <div class="row content">
    <p>
      <b>content</b>
      (fills remaining space)
    </p>
  </div>
  <div class="row footer">
    <p><b>footer</b> (fixed height)</p>
  </div>
</div>

In the CSS above, the flex property shorthands the flex-grow, flex-shrink, and flex-basis properties to establish the flexibility of the flex items. Mozilla has a good introduction to the flexible boxes model.

Html – How to give text or an image a transparent background using CSS

Either use a semi-transparent PNG or SVG image or use CSS:

background-color: rgba(255, 0, 0, 0.5);

Here's an article from css3.info, Opacity, RGBA and compromise (2007-06-03).

<p style="background-color: rgba(255, 0, 0, 0.5);">
  <span>Hello, World!</span>
</p>

Best Solution

Related Solutions

Html – Make a div fill the height of the remaining screen space

2015 update: the flexbox approach

Working example

Html – How to give text or an image a transparent background using CSS

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