Pinch-Zooming in Internet Explorer 10 deaktivieren

Doppelklicks auf einem Touchscreen-Monitor bewirken im IE10, dass die Webseite herangezoomt wird (Stichwörter: Pinch-Zooming oder auch Pinch-To-Zoom). Möchte man das verhindern, so muss man die -ms-touch-action property verwenden:

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<style>
* { -ms-touch-action: none; }
</style>

CSS declarations only for Mozilla Firefox

You can define CSS declarations only for Mozilla Firefox by using the following scheme:

<style type="text/css">
  @-moz-document url-prefix() 
  {
    html
    {
      background: url('https://developer.mozilla.org/@api/deki/files/274/=Moz_ffx_openStandards_1680x1050.jpg') no-repeat;
    }
  }
</style>

background image mittig im div platzieren

#header
{
  width: 100%;
  height: 142px;
  background-image: url('./images/header.png');
  background-repeat: no-repeat;
  background-position: 50% 100%;
}

Mirror background image with CSS3

Here you can see how to mirror a background image with some cool new CSS3 attributes:

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#background
{
  background-image: url('./images/myBackground.png');
  width: 1024px;
  height: 768px;
  /* Mirror the background image */
  -webkit-transform: scaleX(-1);
  -khtml-transform: scaleX(-1);
  -moz-transform: scaleX(-1);
  -ms-transform: scaleX(-1);
  -o-transform: scaleX(-1);
  transform: scaleX(-1);
}

Div Element horizontal und vertikal zentrieren

Ein Code sagt mehr als tausend Worte:

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<!DOCTYPE html>
<html>
  <head>
    <meta charset="utf-8" />
    <title>Centering a Div horizontally and vertically</title>
    <style type="text/css">
      html
      {
        background-color: black;
      }
 
      body
      {
        width: 100%;
        height: 100%;
        position: static; /* don't make it relative! */
      }
 
      #centered
      {
        position: absolute;
        height: 396px;
        width: 400px;
        margin: -198px 0px 0px -200px; /* 50% height, 0px, 0px, 50% width */
        top: 50%;
        left: 50%;
        background-color: violet;
        border: 1px solid white;
      }
    </style>
  </head>
  <body>  
    <div id="centered"></div>
  </body>
</html>