791 lines
30 KiB
HTML
791 lines
30 KiB
HTML
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">
|
|
<html>
|
|
<head>
|
|
<title>YUI Library Examples: Event Utility: Skinning via Progressive Enhancement using the Event Utility and the YUILoader</title>
|
|
|
|
|
|
<meta http-equiv="content-type" content="text/html; charset=utf-8">
|
|
<link rel="stylesheet" type="text/css" href="../../assets/yui.css" >
|
|
|
|
<style>
|
|
/*Supplemental CSS for the YUI distribution*/
|
|
#custom-doc { width: 95%; min-width: 950px; }
|
|
#pagetitle {background-image: url(../../assets/bg_hd.gif);}
|
|
</style>
|
|
|
|
<link rel="stylesheet" type="text/css" href="../../assets/dpSyntaxHighlighter.css">
|
|
<!--Script and CSS includes for YUI dependencies on this page-->
|
|
<link rel="stylesheet" type="text/css" href="../../build/logger/assets/skins/sam/logger.css" />
|
|
<link rel="stylesheet" type="text/css" href="../../build/button/assets/skins/sam/button.css" />
|
|
<script type="text/javascript" src="../../build/yuiloader/yuiloader-min.js"></script>
|
|
<script type="text/javascript" src="../../build/event/event-debug.js"></script>
|
|
<script type="text/javascript" src="../../build/dom/dom-min.js"></script>
|
|
<script type="text/javascript" src="../../build/logger/logger-min.js"></script>
|
|
<script type="text/javascript" src="../../build/element/element-min.js"></script>
|
|
<script type="text/javascript" src="../../build/button/button-min.js"></script>
|
|
|
|
|
|
<!--begin custom header content for this example-->
|
|
<style type="text/css">
|
|
|
|
.yui-checkboxes-loading #checkboxes {
|
|
display: none;
|
|
}
|
|
|
|
</style>
|
|
|
|
<script type="text/javascript">
|
|
|
|
// Hide the checkboxes if JavaScript is enabled to prevent
|
|
// the user from seeing a flash of unstyled content while
|
|
// the JavaScript for the checkboxes is being loaded.
|
|
document.documentElement.className = "yui-checkboxes-loading";
|
|
|
|
</script>
|
|
<!--end custom header content for this example-->
|
|
|
|
|
|
<script type="text/javascript">
|
|
//enable passthrough of errors from YUI Event:
|
|
if ((typeof YAHOO !== "undefined") && (YAHOO.util) && (YAHOO.util.Event)) {
|
|
YAHOO.util.Event.throwErrors = true;
|
|
}
|
|
</script>
|
|
</head>
|
|
<body id="yahoo-com" class="yui-skin-sam">
|
|
<div id="custom-doc" class="yui-t2">
|
|
<div id="hd">
|
|
<div id="ygunav">
|
|
<p><em><a href="http://developer.yahoo.com/yui/">YUI Library Home</a></em></p>
|
|
<form action="http://search.yahoo.com/search" id="sitesearchform">
|
|
<input name="vs" type="hidden" value="developer.yahoo.com">
|
|
<input name="vs" type="hidden" value="yuiblog.com">
|
|
<div id="sitesearch">
|
|
<label for="searchinput">Site Search (YDN & YUIBlog): </label>
|
|
<input type="text" id="searchinput" name="p">
|
|
<input type="submit" value="Search" id="searchsubmit" class="ygbt">
|
|
</div>
|
|
</form> </div>
|
|
<div id="ygma"><a href="../../"><img src="../../assets/yui.gif" border="0" height="38"></a></div>
|
|
<div id="pagetitle"><h1>YUI Library Examples: Event Utility: Skinning via Progressive Enhancement using the Event Utility and the YUILoader</h1></div>
|
|
</div>
|
|
<div id="bd">
|
|
|
|
<div id="yui-main">
|
|
<div class="yui-b">
|
|
<div class="yui-ge">
|
|
<div class="yui-u first example">
|
|
|
|
|
|
<div class="promo">
|
|
<h1>Event Utility: Skinning via Progressive Enhancement using the Event Utility and the YUILoader</h1>
|
|
|
|
<div class="exampleIntro">
|
|
<p>
|
|
Using Progressive Enhancement to skin checkboxes with the help of the YUILoader
|
|
and the Event Utility's <code>focus</code> and <code>blur</code> events and the
|
|
<code>delegate</code> method.
|
|
</p>
|
|
</div>
|
|
|
|
<div class="example-container module ">
|
|
<div class="hd exampleHd">
|
|
<p class="newWindowButton yui-skin-sam"><!--<span id="newWindowLinkx"><span class="first-child">--><a href="event-focus-blur_clean.html" target="_blank">View example in new window.</a><!--</span></span>-->
|
|
</div> <div id="example-canvas" class="bd">
|
|
|
|
|
|
<!--BEGIN SOURCE CODE FOR EXAMPLE =============================== -->
|
|
|
|
<div id="checkboxes">
|
|
<div>
|
|
<label for="field-1">Field 1: </label>
|
|
<span>
|
|
<span>
|
|
<input type="checkbox" id="field-1" name="field-1" value="1">
|
|
</span>
|
|
</span>
|
|
</div>
|
|
<div>
|
|
<label for="field-2">Field 2: </label>
|
|
<span>
|
|
<span>
|
|
<input type="checkbox" id="field-2" name="field-2" value="2">
|
|
</span>
|
|
</span>
|
|
</div>
|
|
<div>
|
|
<label for="field-3">Field 3: </label>
|
|
<span>
|
|
<span>
|
|
<input type="checkbox" id="field-3" name="field-3" value="3">
|
|
</span>
|
|
</span>
|
|
</div>
|
|
</div>
|
|
|
|
<script type="text/javascript">
|
|
|
|
(function () {
|
|
|
|
// Use the YUILoader to load the JavaScript and CSS required for
|
|
// skinning the checkboxes.
|
|
|
|
var loader = new YAHOO.util.YUILoader({
|
|
|
|
require: ["event-delegate"],
|
|
loadOptional: true,
|
|
base: '../../build/',
|
|
timeout: 10000,
|
|
onFailure: function () {
|
|
|
|
// Show the checkboxes if the loader failed that way the original
|
|
// unskinned checkboxes will be visible so that the user can
|
|
// interact with them either way.
|
|
|
|
document.documentElement.className = "";
|
|
|
|
}
|
|
|
|
});
|
|
|
|
loader.addModule({
|
|
name: 'checkboxstyles',
|
|
type: 'css',
|
|
varName: "CheckboxCSS",
|
|
fullpath: 'assets/checkbox.css'
|
|
});
|
|
|
|
loader.addModule({
|
|
name: 'checkboxjs',
|
|
type: 'js',
|
|
varName: "CheckboxJS",
|
|
fullpath: 'assets/checkbox.js'
|
|
});
|
|
|
|
loader.require(["checkboxstyles", "checkboxjs"]);
|
|
|
|
loader.insert();
|
|
|
|
}());
|
|
|
|
</script>
|
|
|
|
|
|
|
|
<!--END SOURCE CODE FOR EXAMPLE =============================== -->
|
|
|
|
|
|
</div>
|
|
|
|
|
|
</div>
|
|
</div>
|
|
|
|
<h3>Challenges</h3>
|
|
<p>
|
|
There are a few challenges when trying to skin an HTML checkbox using CSS. To start, most of the
|
|
<a href="http://developer.yahoo.com/yui/articles/gbs/#a-grade">A-grade browsers</a> don't provide
|
|
support for CSS properties like <code>border</code> and <code>background</code> on the
|
|
<code><input type="checkbox"></code> element. Additionally, IE 6 and IE 7 (Quirks Mode)
|
|
lack support for attribute selectors — necessary to style the <code>checked</code> and
|
|
<code>disabled</code> states. Additionally, IE 6 and 7 only support the <code>:focus</code> and
|
|
<code>:active</code> pseudo classes on <code><a></code> elements, both of which are needed
|
|
to style a checkbox when it is focused or depressed.
|
|
</p>
|
|
|
|
<h3>Approach</h3>
|
|
<p>
|
|
Despite the shortcomings in cross-browser CSS support, with a little extra markup and through the use of
|
|
JavaScript it is possible to skin an <code><input type="checkbox"></code> element
|
|
consistently well in all of the
|
|
<a href="http://developer.yahoo.com/yui/articles/gbs/#a-grade">A-grade browsers</a>.
|
|
</p>
|
|
|
|
<h4>Markup</h4>
|
|
<p>
|
|
Since CSS support for the <code><input type="checkbox"></code> element is lacking, wrap
|
|
<code><input type="checkbox"></code> elements in one or more inline elements to provide the
|
|
necessary hooks for styling. In this example, each <code><input type="checkbox"></code>
|
|
element is wrapped by two <code><span></code>s.
|
|
</p>
|
|
|
|
<textarea name="code" class="HTML" cols="60" rows="1">
|
|
<span>
|
|
<span>
|
|
<input type="checkbox">
|
|
</span>
|
|
</span>
|
|
</textarea>
|
|
|
|
<h4>CSS</h4>
|
|
<p>
|
|
To style each checkbox, a class name of <code>yui-checkbox</code> will be applied to the
|
|
outtermost <code><span></code> wrapping each <code><input type="checkbox"></code>
|
|
element. An additional class will be used to represent the various states of each checkbox. The
|
|
class name for each state will follow a consistent pattern: <code>yui-checkbox-[state]</code>.
|
|
For this example, the following state-based class names will be used:
|
|
</p>
|
|
<dl>
|
|
<dt><code>yui-checkbox-focus</code></dt>
|
|
<dd>The checkbox has focus</dd>
|
|
<dt><code>yui-checkbox-active</code></dt>
|
|
<dd>The checkbox is active (pressed)</dd>
|
|
<dt><code>yui-checkbox-checked</code></dt>
|
|
<dd>The checkbox is checked</dd>
|
|
</dl>
|
|
<p>
|
|
The styles for each checkbox comes together as follows:
|
|
</p>
|
|
|
|
<textarea name="code" class="CSS" cols="60" rows="1">
|
|
.yui-checkbox {
|
|
|
|
display: -moz-inline-stack; /* Gecko < 1.9, since it doesn't support "inline-block" */
|
|
display: inline-block; /* IE, Opera and Webkit, and Gecko 1.9 */
|
|
width: 10px;
|
|
height: 10px;
|
|
border: inset 2px #999;
|
|
background-color: #fff; /* Need to set a background color or IE won't get mouse events */
|
|
|
|
/*
|
|
Necessary for IE 6 (Quirks and Standards Mode) and IE 7 (Quirks Mode), since
|
|
they don't support use of negative margins without relative positioning.
|
|
*/
|
|
|
|
_position: relative;
|
|
}
|
|
|
|
.yui-checkbox span {
|
|
|
|
display: block;
|
|
height: 14px;
|
|
width: 12px;
|
|
overflow: hidden;
|
|
|
|
/* Position the checkmark for Gecko, Opera and Webkit and IE 7 (Strict Mode). */
|
|
margin: -5px 0 0 1px;
|
|
|
|
|
|
/* Position the checkmark for IE 6 (Strict and Quirks Mode) and IE 7 (Quirks Mode).*/
|
|
_margin: 0;
|
|
_position: absolute;
|
|
_top: -5px;
|
|
_left: 1px;
|
|
|
|
}
|
|
|
|
/* For Gecko < 1.9: Positions the checkbox on the same line as its corresponding label. */
|
|
.yui-checkbox span:after {
|
|
|
|
content: ".";
|
|
visibility: hidden;
|
|
line-height: 2;
|
|
|
|
}
|
|
|
|
/*
|
|
Hide the actual checkbox offscreen so that it is out of view, but still accessible via
|
|
the keyboard.
|
|
*/
|
|
.yui-checkbox input {
|
|
|
|
position: absolute;
|
|
left: -10000px;
|
|
|
|
}
|
|
|
|
.yui-checkbox-focus {
|
|
|
|
border-color: #39f;
|
|
background-color: #9cf;
|
|
|
|
}
|
|
|
|
.yui-checkbox-active {
|
|
|
|
background-color: #ccc;
|
|
|
|
}
|
|
|
|
.yui-checkbox-checked span {
|
|
|
|
/* Draw a custom checkmark for the checked state using a background image. */
|
|
background: url(checkmark.png) no-repeat;
|
|
|
|
}
|
|
</textarea>
|
|
|
|
<h4>JavaScript</h4>
|
|
|
|
<p>
|
|
Application and removal of the state-based class names will be facilitated by JavaScript event
|
|
handlers. Each event handler will track the state of the
|
|
<code><input type="checkbox"></code> element, and apply and remove corresponding
|
|
state-based class names from its outtermost <code><span></code> —
|
|
making it easy to style each state. And since each JavaScript is required for state management,
|
|
the stylesheet for the skinned checkboxes will only be added to the page when JavaScript is
|
|
enabled. This will ensure that each checkbox works correctly with and without JavaScript enabled.
|
|
</p>
|
|
|
|
<p>
|
|
Since there could easily be many instances of a skinned checkbox on the page, all event
|
|
listeners will be attached to the containing element for all checkboxes. Each listener will
|
|
listen for events as they bubble up from each checkbox. Relying on event bubbling will improve the
|
|
overall performance of the page by reducing the number of event handlers.
|
|
</p>
|
|
|
|
<p>
|
|
Since the DOM <code>focus</code> and <code>blur</code> events do not bubble, use the Event Utility's
|
|
specialized <code>focusin</code> and <code>focusout</code> events as an alternative to
|
|
attaching discrete focus and blur event handlers to the <code><input type="checkbox"></code>
|
|
element of each skinned checkbox. The specialized <code>focusin</code> and
|
|
<code>focusout</code> events make it possible to attach a single focus and blur event
|
|
listener on the containing element of each checkbox — thereby increasing the performance
|
|
of the page. The complete script for the example comes together as follows:
|
|
</p>
|
|
|
|
<textarea name="code" class="JScript" cols="60" rows="1">
|
|
(function () {
|
|
|
|
var Event = YAHOO.util.Event,
|
|
Dom = YAHOO.util.Dom,
|
|
Selector = YAHOO.util.Selector,
|
|
UA = YAHOO.env.ua,
|
|
|
|
bKeyListenersInitialized = false,
|
|
bMouseListenersInitialized = false,
|
|
sCheckboxFocusClass = "yui-checkbox-focus",
|
|
sCheckboxCheckedClass = "yui-checkbox-checked",
|
|
sCheckboxActiveClass = "yui-checkbox-active",
|
|
forAttr = (UA.ie && UA.ie < 8) ? "htmlFor" : "for",
|
|
bBlockDocumentMouseUp = false,
|
|
bBlockClearActive = false,
|
|
bBlockBlur = false,
|
|
oActiveCheckbox;
|
|
|
|
|
|
var initKeyListeners = function () {
|
|
|
|
Event.delegate(this, "keydown", onCheckboxKeyDown, ".yui-checkbox");
|
|
Event.delegate(this, "click", onCheckboxClick, ".yui-checkbox");
|
|
Event.delegate(this, "focusout", onCheckboxBlur, "input[type=checkbox]");
|
|
|
|
bKeyListenersInitialized = true;
|
|
|
|
};
|
|
|
|
|
|
var initMouseListeners = function () {
|
|
|
|
Event.delegate(this, "mouseover", onCheckboxMouseOver, ".yui-checkbox");
|
|
Event.delegate(this, "mouseout", onCheckboxMouseOut, ".yui-checkbox-active");
|
|
Event.on(this.ownerDocument, "mouseup", onDocumentMouseUp);
|
|
|
|
bMouseListenersInitialized = true;
|
|
|
|
};
|
|
|
|
|
|
var getCheckbox = function (node) {
|
|
|
|
return (Dom.hasClass(node, "yui-checkbox") ? node:
|
|
Dom.getAncestorByClassName(node, "yui-checkbox"));
|
|
|
|
};
|
|
|
|
|
|
var getCheckboxForLabel = function (label) {
|
|
|
|
var sID = label.getAttribute(forAttr),
|
|
oInput,
|
|
oCheckbox;
|
|
|
|
if (sID) {
|
|
|
|
oInput = Dom.get(sID);
|
|
|
|
if (oInput) {
|
|
oCheckbox = getCheckbox(oInput);
|
|
}
|
|
|
|
}
|
|
|
|
return oCheckbox;
|
|
|
|
};
|
|
|
|
|
|
var updateCheckedState = function (input) {
|
|
|
|
var oCheckbox = getCheckbox(input);
|
|
|
|
if (input.checked) {
|
|
Dom.addClass(oCheckbox, sCheckboxCheckedClass);
|
|
}
|
|
else {
|
|
Dom.removeClass(oCheckbox, sCheckboxCheckedClass);
|
|
}
|
|
|
|
};
|
|
|
|
|
|
var setActiveCheckbox = function (checkbox) {
|
|
|
|
Dom.addClass(checkbox, sCheckboxActiveClass);
|
|
oActiveCheckbox = checkbox;
|
|
|
|
};
|
|
|
|
|
|
var clearActiveCheckbox = function () {
|
|
|
|
if (oActiveCheckbox) {
|
|
Dom.removeClass(oActiveCheckbox, sCheckboxActiveClass);
|
|
oActiveCheckbox = null;
|
|
}
|
|
|
|
};
|
|
|
|
|
|
var onCheckboxMouseOver = function (event, matchedEl) {
|
|
|
|
if (oActiveCheckbox === matchedEl) {
|
|
Dom.addClass(oActiveCheckbox, sCheckboxActiveClass);
|
|
}
|
|
|
|
};
|
|
|
|
|
|
var onCheckboxMouseOut = function (event, matchedEl) {
|
|
|
|
Dom.removeClass(matchedEl, sCheckboxActiveClass);
|
|
|
|
};
|
|
|
|
|
|
var onDocumentMouseUp = function (event) {
|
|
|
|
var oCheckbox;
|
|
|
|
if (!bBlockDocumentMouseUp) {
|
|
|
|
oCheckbox = getCheckbox(Event.getTarget(event));
|
|
|
|
if ((oCheckbox && oActiveCheckbox !== oCheckbox) || !oCheckbox) {
|
|
clearActiveCheckbox();
|
|
}
|
|
|
|
}
|
|
|
|
bBlockDocumentMouseUp = false;
|
|
|
|
};
|
|
|
|
|
|
var onCheckboxFocus = function (event, matchedEl, container) {
|
|
|
|
// Remove the focus style from any checkbox that might still have it
|
|
|
|
var oCheckbox = Selector.query(".yui-checkbox-focus", "checkboxes", true);
|
|
|
|
if (oCheckbox) {
|
|
Dom.removeClass(oCheckbox, sCheckboxFocusClass);
|
|
}
|
|
|
|
|
|
// Defer adding key-related and click event listeners until
|
|
// one of the checkboxes is initially focused.
|
|
|
|
if (!bKeyListenersInitialized) {
|
|
initKeyListeners.call(container);
|
|
}
|
|
|
|
oCheckbox = getCheckbox(matchedEl);
|
|
|
|
Dom.addClass(oCheckbox, sCheckboxFocusClass);
|
|
|
|
};
|
|
|
|
|
|
var onCheckboxBlur = function (event, matchedEl) {
|
|
|
|
if (bBlockBlur) {
|
|
bBlockBlur = false;
|
|
return;
|
|
}
|
|
|
|
var oCheckbox = getCheckbox(matchedEl);
|
|
|
|
Dom.removeClass(oCheckbox, sCheckboxFocusClass);
|
|
|
|
if (!bBlockClearActive && oCheckbox === oActiveCheckbox) {
|
|
clearActiveCheckbox();
|
|
}
|
|
|
|
bBlockClearActive = false;
|
|
|
|
};
|
|
|
|
|
|
var onCheckboxMouseDown = function (event, matchedEl, container) {
|
|
|
|
// Defer adding mouse-related and click event listeners until
|
|
// the user mouses down on one of the checkboxes.
|
|
|
|
if (!bMouseListenersInitialized) {
|
|
initMouseListeners.call(container);
|
|
}
|
|
|
|
var oCheckbox,
|
|
oInput;
|
|
|
|
|
|
if (matchedEl.nodeName.toLowerCase() === "label") {
|
|
|
|
// If the target of the event was the checkbox's label element, the
|
|
// label will dispatch a click event to the checkbox, meaning the
|
|
// "onCheckboxClick" handler will be called twice. For that reason
|
|
// it is necessary to block the "onDocumentMouseUp" handler from
|
|
// clearing the active state, so that a reference to the active
|
|
// checkbox still exists the second time the "onCheckboxClick"
|
|
// handler is called.
|
|
|
|
bBlockDocumentMouseUp = true;
|
|
|
|
// When the user clicks the label instead of the checkbox itself,
|
|
// the checkbox will be blurred if it has focus. Since the
|
|
// "onCheckboxBlur" handler clears the active state it is
|
|
// necessary to block the clearing of the active state when the
|
|
// label is clicked instead of the checkbox itself.
|
|
|
|
bBlockClearActive = true;
|
|
|
|
oCheckbox = getCheckboxForLabel(matchedEl);
|
|
|
|
}
|
|
else {
|
|
|
|
oCheckbox = matchedEl;
|
|
|
|
}
|
|
|
|
// Need to focus the input manually for two reasons:
|
|
// 1) Mousing down on a label in Webkit doesn't focus its
|
|
// associated checkbox
|
|
// 2) By default checkboxes are focused when the user mouses
|
|
// down on them. However, since the actually checkbox is
|
|
// obscurred by the two span elements that are used to
|
|
// style it, the checkbox wont' receive focus as it was
|
|
// never the actual target of the mousedown event.
|
|
|
|
oInput = Selector.query("input", oCheckbox, true);
|
|
|
|
// Calling Event.preventDefault won't block the blurring of the
|
|
// currently focused element in IE, so we'll use the "bBlockBlur"
|
|
// variable to stop the code in the blur event handler
|
|
// from executing.
|
|
|
|
bBlockBlur = (UA.ie && document.activeElement == oInput);
|
|
|
|
oInput.focus();
|
|
|
|
setActiveCheckbox(oCheckbox);
|
|
|
|
// Need to call preventDefault because by default mousing down on
|
|
// an element will blur the element in the document that currently
|
|
// has focus--in this case, the input element that was
|
|
// just focused.
|
|
|
|
Event.preventDefault(event);
|
|
|
|
};
|
|
|
|
|
|
var onCheckboxClick = function (event, matchedEl) {
|
|
|
|
var oTarget = Event.getTarget(event),
|
|
oInput;
|
|
|
|
|
|
if (matchedEl === oActiveCheckbox) {
|
|
|
|
oInput = Selector.query("input", matchedEl, true);
|
|
|
|
if (oTarget !== oInput) {
|
|
|
|
// If the click event was fired via the mouse the checked
|
|
// state will have to be manually updated since the input
|
|
// is hidden offscreen and therefore couldn't be the
|
|
// target of the click.
|
|
|
|
oInput.checked = (!oInput.checked);
|
|
|
|
}
|
|
|
|
updateCheckedState(oInput);
|
|
clearActiveCheckbox();
|
|
|
|
}
|
|
|
|
};
|
|
|
|
|
|
var onCheckboxKeyDown = function (event, matchedEl) {
|
|
|
|
// Style the checkbox as being active when the user presses the
|
|
// space bar
|
|
|
|
if (Event.getCharCode(event) === 32) {
|
|
setActiveCheckbox(matchedEl);
|
|
}
|
|
|
|
};
|
|
|
|
|
|
var checkboxes = Selector.query("#checkboxes>div>span");
|
|
|
|
for (var i = checkboxes.length - 1; i >= 0; i--) {
|
|
Dom.addClass(checkboxes[i], "yui-checkbox");
|
|
}
|
|
|
|
// Remove the "yui-checkboxes-loading" class used to hide the
|
|
// checkboxes now that the checkboxes have been skinned.
|
|
|
|
document.documentElement.className = "";
|
|
|
|
|
|
// Add the minimum number of event listeners needed to start, bind the
|
|
// rest when needed
|
|
|
|
Event.delegate("checkboxes", "mousedown", onCheckboxMouseDown, ".yui-checkbox,label");
|
|
Event.delegate("checkboxes", "focusin", onCheckboxFocus, "input[type=checkbox]");
|
|
|
|
}());
|
|
</textarea>
|
|
|
|
<h4>Progressive Enhancement</h4>
|
|
<p>
|
|
The markup above will be transformed using both CSS and JavaScript. To account
|
|
for the scenario where the user has CSS enabled in their browser but JavaScript
|
|
is disabled, the CSS used to style the checkboxes will be loaded via JavaScript
|
|
using the
|
|
<a href="http://developer.yahoo.com/yui/yuiloader">YUI Loader</a>.
|
|
Additionally, a small block of JavaScript will be placed in the
|
|
<code><head></code> — used to temporarily hide the markup
|
|
while the JavaScript and CSS are in the process of loading to prevent the user
|
|
from seeing a flash unstyled content.
|
|
</p>
|
|
<textarea name="code" class="JScript" cols="60" rows="1">
|
|
(function () {
|
|
|
|
// Use the YUILoader to load the JavaScript and CSS required for
|
|
// skinning the checkboxes.
|
|
|
|
var loader = new YAHOO.util.YUILoader({
|
|
|
|
require: ["event-delegate"],
|
|
loadOptional: true,
|
|
base: '../../build/',
|
|
timeout: 10000,
|
|
onFailure: function () {
|
|
|
|
// Show the checkboxes if the loader failed that way the original
|
|
// unskinned checkboxes will be visible so that the user can
|
|
// interact with them either way.
|
|
|
|
document.documentElement.className = "";
|
|
|
|
}
|
|
|
|
});
|
|
|
|
loader.addModule({
|
|
name: 'checkboxstyles',
|
|
type: 'css',
|
|
varName: "CheckboxCSS",
|
|
fullpath: 'assets/checkbox.css'
|
|
});
|
|
|
|
loader.addModule({
|
|
name: 'checkboxjs',
|
|
type: 'js',
|
|
varName: "CheckboxJS",
|
|
fullpath: 'assets/checkbox.js'
|
|
});
|
|
|
|
loader.require(["checkboxstyles", "checkboxjs"]);
|
|
|
|
loader.insert();
|
|
|
|
}());
|
|
</textarea>
|
|
<h2>Configuration for This Example</h2>
|
|
|
|
<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/?yuiloader&MIN#configure">Click here to load the YUI Dependency Configurator with all of this example's dependencies preconfigured</a>.</p>
|
|
|
|
</div>
|
|
<div class="yui-u">
|
|
<div id="loggerModule" class="yui-skin-sam">
|
|
<h3 class="firstContent">YUI Logger Output:</h3>
|
|
<div id="loggerDiv"></div>
|
|
<div id="loggerGloss">
|
|
<p><strong>Note:</strong> You are viewing this example in debug mode with logging enabled. This can significantly slow performance.</p>
|
|
|
|
<p class="loggerButton"><span id="loggerLink"><span class="first-child"><a href="event-focus-blur.html">Reload with logging<br />and debugging disabled.</a></span></span></p>
|
|
</div>
|
|
</div>
|
|
|
|
|
|
<div id="examples">
|
|
<h3>Event Utility Examples:</h3>
|
|
|
|
<div id="exampleToc">
|
|
<ul>
|
|
<li><a href='../event/eventsimple.html'>Simple Event Handling and Processing</a></li><li><a href='../event/custom-event.html'>Using Custom Events</a></li><li><a href='../event/event-timing.html'>Using onAvailable, onContentReady, and onDOMReady</a></li><li><a href='../event/event-delegation.html'>Using Event Utility and Event Delegation to Improve Performance</a></li><li class='selected'><a href='../event/event-focus-blur.html'>Skinning via Progressive Enhancement using the Event Utility and the YUILoader</a></li><li><a href='../container/keylistener.html'>Implementing Container Keyboard Shortcuts with KeyListener (included with examples for Container Family)</a></li><li><a href='../container/container-ariaplugin.html'>Using the Container ARIA Plugin (included with examples for Container Family)</a></li> </ul>
|
|
</div>
|
|
</div>
|
|
|
|
<div id="module">
|
|
<h3>More Event Utility Resources:</h3>
|
|
<ul>
|
|
<li><a href="http://developer.yahoo.com/yui/event/">User's Guide</a> (external)</li>
|
|
<li><a href="../../docs/module_event.html">API Documentation</a></li>
|
|
|
|
|
|
<li><a href="http://yuiblog.com/assets/pdf/cheatsheets/event.pdf">Cheat Sheet PDF</a> (external)</li></ul>
|
|
</div>
|
|
</div>
|
|
</div>
|
|
|
|
</div>
|
|
</div>
|
|
|
|
|
|
<div class="yui-b" id="tocWrapper">
|
|
<!-- TABLE OF CONTENTS -->
|
|
<div id="toc">
|
|
|
|
<ul>
|
|
<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="selected "><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="item"><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>
|
|
</div>
|
|
</div>
|
|
</div><!--closes bd-->
|
|
|
|
<div id="ft">
|
|
<p class="first">Copyright © 2009 Yahoo! Inc. All rights reserved.</p>
|
|
<p><a href="http://privacy.yahoo.com/privacy/us/devel/index.html">Privacy Policy</a> -
|
|
<a href="http://docs.yahoo.com/info/terms/">Terms of Service</a> -
|
|
<a href="http://docs.yahoo.com/info/copyright/copyright.html">Copyright Policy</a> -
|
|
<a href="http://careers.yahoo.com/">Job Openings</a></p>
|
|
</div>
|
|
</div>
|
|
<script src="../../assets/dpSyntaxHighlighter.js"></script>
|
|
<script language="javascript">
|
|
dp.SyntaxHighlighter.HighlightAll('code');
|
|
</script>
|
|
|
|
<script src='../../assets/YUIexamples.js'></script>
|
|
|
|
|
|
</body>
|
|
</html>
|