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/**
* "orientationchange" Event Polyfill
* by Jason LuBean
*
* This polyfill allows you to use "window.orientation"
* and to bind to the "orientationchange" event. It has
* no dependencies on any libraries, but has support for
* using jQuery to bind to the "orientationchange" event.
*
* Because IE8 does not allow you to use attachEvent /
* fireEvent for custom events, you have to set the
* window.onorientationchange function:
*
* function handler() {
* //Do something useful when orientation changes
* }
*
* if(window.addEventListener) {
* window.addEventListener("orientationchange",
* handler, false);
* } else {
* window.onorientationchange = handler;
* }
*
* If you use jQuery:
*
* $(window).on('orientationchange', handler);
*/
if(typeof window.orientation === 'undefined') {
var lastOrientation = -1,
orientationEventType = "orientationchange",
resizeEventType = "resize";
// Set orientation to landscape (90) if width > height
// Set orientation to portait (0) if width <= height
// Use document.body.offsetWidth for IE
function getOrientation() {
var ornttn =
window.outerWidth > 0 ?
(window.outerWidth > window.outerHeight ? 90 : 0) :
(document.body.offsetWidth > document.body.offsetHeight ? 90 : 0);
return ornttn;
}
// Dispatch/fire the "orientationchange" event when the
// width==height boundary is crossed.
function handleResize() {
var evt;
window.orientation = getOrientation();
if(window.orientation != lastOrientation) {
lastOrientation = window.orientation;
if(document.createEvent) {
evt = document.createEvent("HTMLEvents");
evt.initEvent(orientationEventType, true, true);
window.dispatchEvent(evt);
} else {
evt = document.createEventObject();
evt.eventType = orientationEventType;
evt.eventName = orientationEventType;
if(window[orientationEventType]) {
window[orientationEventType]();
} else if(window['on'+orientationEventType]) {
window['on'+orientationEventType]();
} else if(typeof jQuery == 'function') {
$(window).trigger(orientationEventType);
}
}
}
}
//Listen for the window "resize" event
if(window.addEventListener)
window.addEventListener( resizeEventType, handleResize, false);
else
window["on"+resizeEventType] = handleResize;
//Initialize the orientation
window.orientation = getOrientation();
}
<!doctype html>
<html>
<head>
<meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=1">
<link rel="stylesheet" href="orientationchange-style.css">
<script src="orientationchange.js"></script>
</head>
<body>
<div id="floater"></div>
<div id="orientation-change">
orientationchange
</div>
</body>
</html>
html, body {
height: 100%;
margin: 0px;
background-color: white;
}
#floater {
height:50%; margin-bottom:-10px; position:relative;
}
#orientation-change {
font-size: 20px;
color: black;
text-align: center;
width: 100%;
height: 20px;
display: block;
}
.portrait {
background-color: #33ff99;
}
.landscape {
background-color: #3399ff;
}
div {
-webkit-box-sizing: border-box;
-moz-box-sizing: border-box;
-ms-box-sizing: border-box;
-o-box-sizing: border-box;
box-sizing: border-box;
}
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