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Launching Fullscreen Mode

// Find the right method, call on correct element
function launchIntoFullscreen(element) {
  if(element.requestFullscreen) {
    element.requestFullscreen();
  } else if(element.mozRequestFullScreen) {
    element.mozRequestFullScreen();
  } else if(element.webkitRequestFullscreen) {
    element.webkitRequestFullscreen();
  } else if(element.msRequestFullscreen) {
    element.msRequestFullscreen();
  }
}

// Launch fullscreen for browsers that support it!
launchIntoFullscreen(document.documentElement); // the whole page
launchIntoFullscreen(document.getElementById("videoElement")); // any individual element

Exiting Fullscreen Mode

// Whack fullscreen
function exitFullscreen() {
  if(document.exitFullscreen) {
    document.exitFullscreen();
  } else if(document.mozCancelFullScreen) {
    document.mozCancelFullScreen();
  } else if(document.webkitExitFullscreen) {
    document.webkitExitFullscreen();
  }
}

// Cancel fullscreen for browsers that support it!
exitFullscreen();

Fullscreen Properties & Events

• document.fullScreenElement: the element which has been pushed to fullscreen.

• document.fullScreenEnabled:  notes if fullscreen is current enabled.

var fullscreenElement = document.fullscreenElement || document.mozFullScreenElement || document.webkitFullscreenElement;
var fullscreenEnabled = document.fullscreenEnabled || document.mozFullScreenEnabled || document.webkitFullscreenEnabled;

Fullscreen CSS

Browsers do provide us one helpful bit of fullscreen CSS control:

:-webkit-full-screen {
  /* properties */
}

:-moz-full-screen {
  /* properties */
}

:-ms-fullscreen {
  /* properties */
}

:full-screen { /*pre-spec */
  /* properties */
}

:fullscreen { /* spec */
  /* properties */
}

/* deeper elements */
:-webkit-full-screen video {
  width: 100%;
  height: 100%;
}

/* styling the backdrop*/
::backdrop {
  /* properties */
}
::-ms-backdrop {
  /* properties */
}

Fullscreen API

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原文地址：http://my.oschina.net/jsan/blog/335484