mirror of
https://github.com/alchemy-fr/Phraseanet.git
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364 lines
21 KiB
HTML
364 lines
21 KiB
HTML
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">
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<html>
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<head>
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<title>YUI Library Examples: YAHOO Global Object: User Agent Detection</title>
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<meta http-equiv="content-type" content="text/html; charset=utf-8">
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<link rel="stylesheet" type="text/css" href="../../assets/yui.css" >
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<style>
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/*Supplemental CSS for the YUI distribution*/
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#custom-doc { width: 95%; min-width: 950px; }
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#pagetitle {background-image: url(../../assets/bg_hd.gif);}
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</style>
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<link rel="stylesheet" type="text/css" href="../../assets/dpSyntaxHighlighter.css">
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<!--Script and CSS includes for YUI dependencies on this page-->
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<link rel="stylesheet" type="text/css" href="../../build/button/assets/skins/sam/button.css" />
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<script type="text/javascript" src="../../build/yuiloader/yuiloader-min.js"></script>
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<script type="text/javascript" src="../../build/event/event-min.js"></script>
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<script type="text/javascript" src="../../build/dom/dom-min.js"></script>
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<script type="text/javascript" src="../../build/dragdrop/dragdrop-min.js"></script>
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<script type="text/javascript" src="../../build/element/element-min.js"></script>
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<script type="text/javascript" src="../../build/button/button-min.js"></script>
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<!--begin custom header content for this example-->
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<style type="text/css">
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#dd1,#dd2 {
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position: relative;
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margin: 1em 1em 0;
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width: 175px;
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float: left;
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cursor: move;
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}
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#demo p {
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position: relative;
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padding: 1em;
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height: 100%;
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margin: 0;
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font-weight: bold;
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text-align: center;
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z-index: 20;
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}
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#dd1 p {
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border: 10px solid #ccc;
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background-color: #eee;
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}
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#dd2 p {
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border: 10px solid #e76300;
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background-color: #fff5df;
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}
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#demo .shim {
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position: absolute;
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top: 0;
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left: 0;
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width: 100%;
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margin: 0;
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padding: 0;
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border: 0;
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z-index: 10;
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}
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</style>
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<!--end custom header content for this example-->
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<script type="text/javascript">
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//enable passthrough of errors from YUI Event:
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if ((typeof YAHOO !== "undefined") && (YAHOO.util) && (YAHOO.util.Event)) {
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YAHOO.util.Event.throwErrors = true;
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}
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</script>
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</head>
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<body id="yahoo-com" class="yui-skin-sam">
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<div id="custom-doc" class="yui-t2">
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<div id="hd">
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<div id="ygunav">
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<p><em><a href="http://developer.yahoo.com/yui/">YUI Library Home</a></em></p>
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<form action="http://search.yahoo.com/search" id="sitesearchform">
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<input name="vs" type="hidden" value="developer.yahoo.com">
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<input name="vs" type="hidden" value="yuiblog.com">
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<div id="sitesearch">
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<label for="searchinput">Site Search (YDN & YUIBlog): </label>
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<input type="text" id="searchinput" name="p">
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<input type="submit" value="Search" id="searchsubmit" class="ygbt">
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</div>
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</form> </div>
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<div id="ygma"><a href="../../"><img src="../../assets/yui.gif" border="0" height="38"></a></div>
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<div id="pagetitle"><h1>YUI Library Examples: YAHOO Global Object: User Agent Detection</h1></div>
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</div>
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<div id="bd">
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<div id="yui-main">
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<div class="yui-b">
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<div class="yui-ge">
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<div class="yui-u first example">
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<div class="promo">
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<h1>YAHOO Global Object: User Agent Detection</h1>
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<div class="exampleIntro">
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<p>This example demonstrates the use of <code>YAHOO.env.ua</code> to identify the user's browser and to branch JavaScript logic based on what browser is being used. (<strong>Note:</strong> We strongly recommend using feature detection rather than user-agent sniffing to fork code; only use this technique where it is absolutely necessary to do so — for example, in cases where browsers do not report their own capabilities accurately.)</p>
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</div>
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<div class="example-container module ">
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<div class="hd exampleHd">
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<p class="newWindowButton yui-skin-sam"><!--<span id="newWindowLinkx"><span class="first-child">--><a href="yahoo_ua_detection_clean.html" target="_blank">View example in new window.</a><!--</span></span>-->
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</div> <div id="example-canvas" class="bd">
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<!--BEGIN SOURCE CODE FOR EXAMPLE =============================== -->
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<div id="demo">
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<select name="foo">
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<option value="NONE" selected="selected">This is a very long select element for the example</option>
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<option value="1">Apple</option>
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<option value="2">Rutabaga</option>
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<option value="3">Motor oil</option>
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</select>
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<hr>
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<div id="dd1">
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<p>
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NO IFRAME<br>
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Drag over the select
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</p>
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</div>
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<div id="dd2">
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<p>
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IFRAME<br>
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Drag over the select
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</p>
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</div>
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</div>
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<script type="text/javascript">
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YAHOO.util.Event.onDOMReady(function () {
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var dd1 = new YAHOO.util.DD('dd1');
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var dd2 = new YAHOO.util.DD('dd2');
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dd1.startDrag = function (x,y) {
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YAHOO.log("Drag started for element with no protection from the display bug", "info", "example");
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}
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if (YAHOO.env.ua.ie > 5 && YAHOO.env.ua.ie < 7) {
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// Create an iframe shim
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var shim = document.createElement('iframe');
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shim.src = 'about:blank';
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shim.className = 'shim';
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// Add the shim to the dragging element on the first startDrag
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dd2.startDrag = function (x,y) {
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var d = this.getEl();
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if (d.firstChild !== shim) {
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YAHOO.util.Dom.setStyle(shim, 'height',d.offsetHeight);
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d.insertBefore(shim, d.firstChild);
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YAHOO.log("Your browser is IE " + YAHOO.env.ua.ie + ". Shim added.", "info","example");
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} else {
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YAHOO.log("Your browser is IE " + YAHOO.env.ua.ie + ", but the shim was already added", "info","example");
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}
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}
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} else { // Not shim worthy
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dd2.startDrag = function (x,y) {
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YAHOO.log("Your browser is NOT IE. No shim added.", "info", "example");
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}
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}
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});
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</script>
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<!--END SOURCE CODE FOR EXAMPLE =============================== -->
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</div>
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</div>
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</div>
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<h2 class="first">First, a word of caution</h2>
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<p><strong>Please DO NOT use this in place of feature detection</strong>. Though many browsers have known JavaScript implementation quirks, it is bad practice and unsafe coding to make the assumption that because the page is being viewed in browser X that you can rely on feature Y being available. Check for feature Y if you need it.</p>
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<p>Browser sniffing is an imprecise science, and relies on many things in the browser environment to be just right. Though many techniques are very accurate, 100% accuracy can't be guaranteed.</p>
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<p>Use the <code>YAHOO.env.ua</code> object to inform you of what browser your page is being viewed in, but for your own sake, do not infer anything from this.</p>
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<h2>What YAHOO.env.ua looks like</h2>
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<p><code>YAHOO.env.ua</code> is an object literal containing keys for most major user agents. The key corresponding to the current browser is assigned a version number. All others have value 0.</p>
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<textarea name="code" class="JScript" cols="60" rows="1">
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if (YAHOO.env.ua.gecko > 0) {} // e.g. Firefox
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if (YAHOO.env.ua.ie > 0) {} // Microsoft Internet Explorer
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// Or leverage boolean coercion -- 0 evaulates as false
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if (YAHOO.env.ua.opera) {} // Opera
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if (YAHOO.env.ua.webkit) {} // Safari, Webkit
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</textarea>
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<p>There's more information on the <code>YAHOO.env.ua</code> object and value ranges in the <a href="http://developer.yahoo.com/yui/docs/YAHOO.env.ua.html">API Documentation</a>.</p>
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<h2>Bundled with the YAHOO Global Object</h2>
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<p>YAHOO.env comes bundled with the <a href="http://developer.yahoo.com/yui/yahoo/">YAHOO Global Object</a> and is used to keep track of what is known about the YUI library and the browsing environment.</p>
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<p>If you are using any other YUI component on your page, you should already have YAHOO.env available. Otherwise, add the following:</p>
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<textarea name="code" class="HTML" cols="60" rows="1">
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<script type="text/javascript" src="http://yui.yahooapis.com/2.8.2r1/build/yahoo/yahoo-min.js"></script>
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</textarea>
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<h2>The example: drag elements and rendering bugs</h2>
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<p>In this example, we'll add an iframe shim to a <a href="http://developer.yahoo.com/yui/dragdrop/">Drag and Drop</a> element to account for a known display bug in Internet Explorer 6 regarding the z-indexing of <code>select</code> elements. For you folks out there not using IE6, here's a screen shot of the bug in action.</p>
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<img src="<?= $assetsDirectory ?>/needs_shim.png" alt="IE6 shows the select above all elements despite z-indexing">
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<p>In this case, there is no way other than browser sniffing or conditional comments to address IE's rendering bug. We'll choose sniffing over using proprietary extensions.</p>
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<p>Here's the markup for the example:</p>
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<textarea name="code" class="HTML" cols="60" rows="1">
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<div id="demo">
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<select name="foo">
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<option value="NONE" selected="selected">This is a very long select element for the example</option>
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<option value="1">Apple</option>
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<option value="2">Rutabaga</option>
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<option value="3">Motor oil</option>
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</select>
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<hr>
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<div id="dd1">
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<p>
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NO IFRAME<br>
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Drag over the select
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</p>
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</div>
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<div id="dd2">
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<p>
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IFRAME<br>
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Drag over the select
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</p>
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</div>
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</div>
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</textarea>
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<h2>Targeting a browser for certain action</h2>
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<p>Here, we create two Drag and Drop elements, then add the shim to the <code>dd2</code> element if the page is being viewed in a vulnerable version of IE. Normally, of course, you'd add the shim behavior to both, but this will allow us to compare results.</p>
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<textarea name="code" class="JScript" cols="60" rows="1">
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YAHOO.util.Event.onDOMReady(function () {
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var dd1 = new YAHOO.util.DD('dd1');
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var dd2 = new YAHOO.util.DD('dd2');
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// Note the ua.{key} value must be above 0 to indicate a match
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if (YAHOO.env.ua.ie > 5 && YAHOO.env.ua.ie < 7) {
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// Create an iframe shim
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var shim = document.createElement('iframe');
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shim.src = 'about:blank';
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shim.className = 'shim';
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// Add the shim to the dragging element on the first startDrag
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dd2.startDrag = function (x,y) {
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var d = this.getEl();
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if (d.firstChild !== shim) {
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YAHOO.util.Dom.setStyle(shim, 'height',d.offsetHeight);
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d.insertBefore(shim, d.firstChild);
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}
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}
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}
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});
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</textarea>
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<h2>Configuration for This Example</h2>
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<p>You can load the necessary JavaScript and CSS for this example from Yahoo's servers. <a href="http://developer.yahoo.com/yui/articles/hosting/?event&dom&dragdrop&MIN#configure">Click here to load the YUI Dependency Configurator with all of this example's dependencies preconfigured</a>.</p>
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</div>
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<div class="yui-u">
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<div id="loggerModule" class="yui-skin-sam">
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<h3 class="firstContent">YUI Logger Output:</h3>
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<div id="loggerGloss"><p><strong>Note:</strong> Logging and debugging is currently turned off for this example.</p>
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<p class="loggerButton"><span id="loggerLink"><span class="first-child"><a href="yahoo_ua_detection_log.html">Reload with logging<br />
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and debugging enabled.</a></span></span></p></div>
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</div>
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<div id="examples">
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<h3>YAHOO Global Object Examples:</h3>
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<div id="exampleToc">
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<ul>
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<li><a href='../yahoo/yahoo_type_checking.html'>Type-Checking Your Data</a></li><li class='selected'><a href='../yahoo/yahoo_ua_detection.html'>User Agent Detection</a></li><li><a href='../yahoo/yahoo_extend.html'>Creating Class Hierarchies with <code>YAHOO.lang.extend</code></a></li><li><a href='../yahoo/yahoo_augment_proto.html'>Creating a Composition-Based Class Structure Using <code>YAHOO.lang.augmentProto</code></a></li><li><a href='../yahoo/yahoo_augment_object.html'>Add Behavior to Objects or Static Classes with <code>YAHOO.lang.augmentObject</code></a></li><li><a href='../yahoo/yahoo_merge.html'>Combining Simple Data Sets with <code>YAHOO.lang.merge</code></a></li> </ul>
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</div>
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</div>
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<div id="module">
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<h3>More YAHOO Global Object Resources:</h3>
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<ul>
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<li><a href="http://developer.yahoo.com/yui/yahoo/">User's Guide</a> (external)</li>
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<li><a href="../../docs/module_yahoo.html">API Documentation</a></li>
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</ul>
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</div>
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</div>
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</div>
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</div>
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</div>
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<div class="yui-b" id="tocWrapper">
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<!-- TABLE OF CONTENTS -->
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<div id="toc">
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<ul>
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<li class="sect first">Yahoo! UI Library</li><li class="item"><a title="The Yahoo! User Interface Library (YUI)" href="http://developer.yahoo.com/yui/">Home (external)</a></li><li class="item"><a title="The Yahoo! User Interface Blog" href="http://yuiblog.com">YUIBlog (external)</a></li><li class="item"><a title="YUILibrary.com hosts the YUI community forums" href="http://yuilibrary.com/forum/">YUI Discussion Forum (external)</a></li><li class="item"><a title="The YUI Library source can be checked out from GitHub" href="http://github.com/yui/">YUI on GitHub</a></li><li class="item"><a title="Instantly searchable API documentation for the entire YUI library." href="../../docs/index.html">API Documentation</a></li><li class="item"><a title="Examples of every YUI utility and control in action" href="../../examples/">Functional Examples</a></li><li class="item"><a title="Videos and podcasts from the YUI Team and from the Yahoo! frontend engineering community." href="http://developer.yahoo.com/yui/theater/">YUI Theater (external)</a></li><li class="item"><a title="YUI is free and open, offered under a BSD license." href="http://developer.yahoo.com/yui/license.html">YUI License (external)</a></li><li class="sect">YUI Functional Examples</li><li class="item"><a title="The YUI Animation Utility - Functional Examples" href="../../examples/animation/index.html">Animation</a></li><li class="item"><a title="The YUI AutoComplete Control - Functional Examples" href="../../examples/autocomplete/index.html">AutoComplete</a></li><li class="item"><a title="The YUI Browser History Manager - Functional Examples" href="../../examples/history/index.html">Browser History Manager</a></li><li class="item"><a title="The YUI Button Control - Functional Examples" href="../../examples/button/index.html">Button</a></li><li class="item"><a title="The YUI Calendar Control - Functional Examples" href="../../examples/calendar/index.html">Calendar</a></li><li class="item"><a title="The YUI Carousel Control - Functional Examples" href="../../examples/carousel/index.html">Carousel</a></li><li class="item"><a title="The YUI Charts Control - Functional Examples" href="../../examples/charts/index.html">Charts</a></li><li class="item"><a title="The YUI Color Picker Control - Functional Examples" href="../../examples/colorpicker/index.html">Color Picker</a></li><li class="item"><a title="The YUI Cookie Utility - Functional Examples" href="../../examples/cookie/index.html">Cookie</a></li><li class="item"><a title="The YUI Connection Manager (AJAX) - Functional Examples" href="../../examples/connection/index.html">Connection Manager</a></li><li class="item"><a title="The YUI Container Family (Module, Overlay, Tooltip, Panel, Dialog, SimpleDialog) - Functional Examples" href="../../examples/container/index.html">Container</a></li><li class="item"><a title="The YUI DataTable Control - Functional Examples" href="../../examples/datatable/index.html">DataTable</a></li><li class="item"><a title="The YUI Dom Collection - Functional Examples" href="../../examples/dom/index.html">Dom</a></li><li class="item"><a title="The YUI Drag & Drop Utility - Functional Examples" href="../../examples/dragdrop/index.html">Drag & Drop</a></li><li class="item"><a title="The YUI Event Utility - Functional Examples" href="../../examples/event/index.html">Event</a></li><li class="item"><a title="The YUI Get Utility - Functional Examples" href="../../examples/get/index.html">Get</a></li><li class="item"><a title="The YUI ImageCropper Control - Functional Examples" href="../../examples/imagecropper/index.html">ImageCropper</a></li><li class="item"><a title="The YUI ImageLoader Utility - Functional Examples" href="../../examples/imageloader/index.html">ImageLoader</a></li><li class="item"><a title="The YUI JSON Utility - Functional Examples" href="../../examples/json/index.html">JSON</a></li><li class="item"><a title="The YUI Layout Manager - Functional Examples" href="../../examples/layout/index.html">Layout Manager</a></li><li class="item"><a title="The YUI Logger Control - Functional Examples" href="../../examples/logger/index.html">Logger</a></li><li class="item"><a title="The YUI Menu Control - Functional Examples" href="../../examples/menu/index.html">Menu</a></li><li class="item"><a title="The YUI Paginator - Functional Examples" href="../../examples/paginator/index.html">Paginator</a></li><li class="item"><a title="The YUI Profiler Utility - Functional Examples" href="../../examples/profiler/index.html">Profiler</a></li><li class="item"><a title="The YUI ProfileViewer Control - Functional Examples" href="../../examples/profilerviewer/index.html">ProfilerViewer</a></li><li class="item"><a title="The YUI ProgressBar Control - Functional Examples" href="../../examples/progressbar/index.html">ProgressBar</a></li><li class="item"><a title="The YUI Resize Utility - Functional Examples" href="../../examples/resize/index.html">Resize</a></li><li class="item"><a title="The YUI Rich Text Editor - Functional Examples" href="../../examples/editor/index.html">Rich Text Editor</a></li><li class="item"><a title="The YUI Selector Utility - Functional Examples" href="../../examples/selector/index.html">Selector</a></li><li class="item"><a title="The YUI Slider Control - Functional Examples" href="../../examples/slider/index.html">Slider</a></li><li class="item"><a title="The YUI Storage Utility - Functional Examples" href="../../examples/storage/index.html">Storage</a></li><li class="item"><a title="The YUI SWF Utility - Functional Examples" href="../../examples/swf/index.html">SWF</a></li><li class="item"><a title="The YUI SWFStore Utility - Functional Examples" href="../../examples/swfstore/index.html">SWFStore</a></li><li class="item"><a title="The YUI Stylesheet Utility - Functional Examples" href="../../examples/stylesheet/index.html">Stylesheet</a></li><li class="item"><a title="The YUI TabView Control - Functional Examples" href="../../examples/tabview/index.html">TabView</a></li><li class="item"><a title="The YUI TreeView Control - Functional Examples" href="../../examples/treeview/index.html">TreeView</a></li><li class="item"><a title="The YUI Uploader Utility - Functional Examples" href="../../examples/uploader/index.html">Uploader (experimental)</a></li><li class="selected "><a title="The YUI YAHOO Global Object - Functional Examples" href="../../examples/yahoo/index.html">YAHOO Global Object</a></li><li class="item"><a title="The YUI Loader Utility - Functional Examples" href="../../examples/yuiloader/index.html">YUI Loader</a></li><li class="item"><a title="The YUI Test Utility - Functional Examples" href="../../examples/yuitest/index.html">YUI Test</a></li><li class="item"><a title="YUI Reset CSS - Functional Examples" href="../../examples/reset/index.html">Reset CSS</a></li><li class="item"><a title="YUI Base CSS - Functional Examples" href="../../examples/base/index.html">Base CSS</a></li><li class="item"><a title="YUI Fonts CSS - Functional Examples" href="../../examples/fonts/index.html">Fonts CSS</a></li><li class="item"><a title="YUI Grids CSS - Functional Examples" href="../../examples/grids/index.html">Grids CSS</a></li><li class="sect">YUI Articles on the YUI Website</li><li class="item"><a title="Answers to Frequently Asked Questions about the YUI Library" href="http://developer.yahoo.com/yui/articles/faq/">YUI FAQ (external)</a></li><li class="item"><a title="Yahoo!'s philosophy of Graded Browser Support" href="http://developer.yahoo.com/yui/articles/gbs/">Graded Browser Support (external)</a></li><li class="item"><a title="Reporting Bugs and Making Feature Requests for YUI Components" href="http://developer.yahoo.com/yui/articles/reportingbugs/">Bug Reports/Feature Requests (external)</a></li><li class="item"><a title="Serve YUI source files from Yahoo! -- free, fast, and simple" href="http://developer.yahoo.com/yui/articles/hosting/">Serving YUI Files from Yahoo! (external)</a></li><li class="item"><a title="Best practices for working with web services while protecting user privacy" href="http://developer.yahoo.com/security/">Security Best Practices (external)</a></li></ul>
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