JavaScript DHTML/YUI Library/CSS Style

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Add a red border to all of the LI elements with the class of "selected" that live in a UL.

   <source lang="html4strict">


<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd"> <html> <head> 

   <meta http-equiv="content-type" content="text/html; charset=utf-8">

<title>Using query</title> <style type="text/css"> /*margin and padding on body element 

 can introduce errors in determining
 element position and are not recommended;
 we turn them off as a foundation for YUI
 CSS treatments. */

body { 

 margin:0;
 padding:0;

} </style> <link rel="stylesheet" type="text/css" href="yui_2.7.0b-lib/fonts/fonts-min.css" /> <script type="text/javascript" src="yui_2.7.0b-lib/yahoo-dom-event/yahoo-dom-event.js"></script> <script type="text/javascript" src="yui_2.7.0b-lib/selector/selector-min.js"></script>


<style type="text/css">

  1. selector-demo ul {
   float:left;

}

  1. selector-demo ol {
   clear:both;

} </style>


</head> <body class=" yui-skin-sam">

Using query

Clicking the button will add a red border to all of the LI elements with the class of "selected" that live in a UL.

  • lorem
  • ipsum
  • dolor
  • sit
  • lorem
  • ipsum
  • dolor
  • sit
  • lorem
  • ipsum
  • dolor
  • sit
  1. lorem
  2. ipsum
  3. dolor
  4. sit
   <button id="demo-run">run</button>

<script type="text/javascript"> (function() { 

   var handleClick = function(e) {
       var nodes = YAHOO.util.Selector.query("ul li.selected");
       YAHOO.util.Dom.setStyle(nodes, "border", "1px solid red");
   };
   YAHOO.util.Event.on("demo-run", "click", handleClick);
   YAHOO.log("The example has finished loading; as you interact with it, you"ll see log messages appearing here.", "info", "example");

})(); </script>

</body> </html> 


 </source>

<A href="http://www.wbex.ru/Code/JavaScriptDownload/yui_2.7.0b.zip">yui_2.7.0b.zip( 4,431 k)</a>


Clicking the button will use Dom"s addClass method to add the class baz to the element.

   <source lang="html4strict">

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd"> <html> <head> 

   <meta http-equiv="content-type" content="text/html; charset=utf-8">

<title>Using addClass</title> <style type="text/css"> /*margin and padding on body element 

 can introduce errors in determining
 element position and are not recommended;
 we turn them off as a foundation for YUI
 CSS treatments. */

body { 

 margin:0;
 padding:0;

} </style> <link rel="stylesheet" type="text/css" href="yui_2.7.0b-lib/fonts/fonts-min.css" /> <script type="text/javascript" src="yui_2.7.0b-lib/yahoo-dom-event/yahoo-dom-event.js"></script>


<style type="text/css">

  1. foo {
   margin-bottom:1em;

} </style>

</head> <body class=" yui-skin-sam">

Using addClass

Clicking the button will use Dom"s addClass method to add the class baz to the element.

foo

<button id="demo-run">run</button> <script type="text/javascript"> (function() { 

   var addClass = function(e) {
       YAHOO.util.Dom.addClass("foo", "baz");
       alert(YAHOO.util.Dom.get("foo").className);
   };
   YAHOO.util.Event.on("demo-run", "click", addClass);
   YAHOO.log("The example has finished loading; as you interact with it, you"ll see log messages appearing here.", "info", "example");

})(); </script>

</body> </html> 


 </source>

<A href="http://www.wbex.ru/Code/JavaScriptDownload/yui_2.7.0b.zip">yui_2.7.0b.zip( 4,431 k)</a>


Dynamic addition and removal of three stylesheets that change the appearance of the News module.

   <source lang="html4strict">

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd"> <html> <head> 

   <meta http-equiv="content-type" content="text/html; charset=utf-8">

<title>Getting CSS Style Sheets</title> <style type="text/css"> /*margin and padding on body element 

 can introduce errors in determining
 element position and are not recommended;
 we turn them off as a foundation for YUI
 CSS treatments. */

body { 

 margin:0;
 padding:0;

} </style> <link rel="stylesheet" type="text/css" href="yui_2.7.0b-lib/fonts/fonts-min.css" /> <link rel="stylesheet" type="text/css" href="yui_2.7.0b-lib/button/assets/skins/sam/button.css" /> <script type="text/javascript" src="yui_2.7.0b-lib/yuiloader-dom-event/yuiloader-dom-event.js"></script> <script type="text/javascript" src="yui_2.7.0b-lib/element/element-min.js"></script> <script type="text/javascript" src="yui_2.7.0b-lib/button/button-min.js"></script>


<style type="text/css" id="styleoverrides"> 

 #container .hd {
   background-image:url(http://us.i1.yimg.ru/us.yimg.ru/i/us/nt/ma/ma_nws_1.gif);
   background-position:top right;
   background-repeat:no-repeat;
   background-color:none;
 } 
 
 #container h2 {
   border:none;
   margin-top:0;
 }
 #container h3 {
   color:#999999;
 }
 
 #buttonContainer {
   padding-bottom:.5em;
 }
 
 #container .module {
   padding:.5em 1em 1em 1em;
   overflow:hidden;
 }

/* 

   When we load the new CSS files, these files will be loaded above this style block.
   If we need to override any styles supplied by the new CSS files, we can do this
   here.  For instance, this is useful if you are loading YUI skin files dynamically,
   but want to override some of the styles.
  • /

</style>

</head> <body class=" yui-skin-sam">

Getting CSS Style Sheets

<a href="http://developer.yahoo.ru/yui/get">The YUI Get Utility</a> can be used to fetch CSS stylesheets after the page has loaded. This allows you to reduce the size of your "main" stylesheet by segregating the style rules for specific modules that may not be displayed when the page is first rendered. Once the module is needed, you can bring in the CSS (and JavaScript) dynamically using the Get Utility.

The example below demonstrates the dynamic addition and removal of three stylesheets that change the appearance of the News module. By clicking on the buttons (which make use of the <a href="http://developer.yahoo.ru/yui/button/">YUI Button Control</a>), you can add/remove border, background, and font treatments for the module. (Note: The News module itself is built using the Get Utility to fetch JSON data from the <a href="http://developer.yahoo.ru/search/news/V1/newsSearch.html">Yahoo! News Search web service</a>; it follows the same code pattern described in the <a href="get-script-basic.html">"Getting a Script Node with JSON Data"</a> example.)

In the News:

               <form method="GET" action="http://search.yahooapis.ru/NewsSearchService/V1/newsSearch" id="newsSearch">            
                   <label for="searchString">Search Yahoo! News:</label> <input type="text" name="p" id="searchString" value="San Francisco" size="40">                
                   <input type="submit" id="getNewsData" value="Search Yahoo! News">                
               </form>

<script language="javascript"> // Encapsulating our code in a self-executing anonymous function // is one way to create a namespace: (function() { // shortcuts and other variables: var Button = YAHOO.widget.Button, 

   Event = YAHOO.util.Event,
   Dom = YAHOO.util.Dom,
   Get = YAHOO.util.Get,
   elContainer = Dom.get("container"),
   tIds = {};

// YUI Buttons are attractive and effective for "call to action" // tasks like the one here. We"ll create buttons purely from // JavaScript; there"s no need for this style-change functionality // to be "accessible"; in fact, it"s purely cosmetic, so keeping // these buttons out of the page"s initial DOM is preferable. We"ll // use the "name" property of the button to determine what CSS to // load when each button is clicked: var borderButton = new Button({ 

   id: "borderButton",
   type: "checkbox",
   name: "border",
   label: "Border CSS",
   container: "buttonContainer"

}); var backgroundButton = new Button({ 

   id: "backgroundButton",
   type: "checkbox",
   name: "background",
   label: "Background CSS",
   container: "buttonContainer"

}); var textButton = new Button({ 

   id: "textButton",
   type: "checkbox",
   name: "text",
   label: "Text CSS",
   container: "buttonContainer"

}); // Making available outside the anonymous function so these can be // introspected in FireBug if desired: YAHOO.example.buttons = [borderButton, backgroundButton, textButton]; // Checkbox buttons are either checked or unchecked; when their state // changes, their "onCheckedChange" event fires. We"ll use that // event to trigger the loading and unloading of CSS using the Get // Utility. var onCheckedChange = function() { 

   //Which button was actuated?
   var name = this.get("name");
   //The button"s checked state has already been updated, so if
   //true we load the necessary CSS:
   if(this.get("checked")) {
       // We"ll use the "data" parameter to pass through the name
       // of the CSS file to our onSuccess handler.  This allows
       // us to have access to the purge method when we want
       // to remove the CSS.
       //
       // In addition, we use the "insertBefore" property to specify
       // the id of a style block we want to insert the new nodes
       // before.  By doing this, we can ensure that any style overrides
       // for the dynamically loaded CSS will be applied in the correct
       // order.
       Get.css("yui_2.7.0b-assets/get-assets/" + name + ".css", {
               data:         name,
               insertBefore: "styleoverrides",
               onSuccess:    onSuccess
       });
   } else {
       // In onSuccess, we save a reference to the callback object
       // in an associative array (tIds) indexed by the CSS name.  That 
       // allows us here, when the CSS needs to be removed, to simply
       // call the purge method corresponding to the item we want to 
       // remove.  Purge clears all the link nodes that were created
       // as part of the transaction (in this case, just a single 
       // link node).
       tIds[this.get("name")].purge();
       YAHOO.log("CSS was successfully purged; our object containing transaction ids now looks like this: " + YAHOO.lang.dump(tIds, 1),  "info", "example");
       
       // Some A-Grade browsers won"t repaint automatically when CSS link nodes
       // are removed.  You can nudge these browsers to repaint by adding
       // a blank CSS stylesheet to the page:
       Get.css("yui_2.7.0b-assets/get-assets/neutral.css");
   }

}; // Now we can subscribe our onCheckedChange function to each // of our three YUI Buttons" "checkedChange" event: borderButton.on("checkedChange", onCheckedChange); backgroundButton.on("checkedChange", onCheckedChange); textButton.on("checkedChange", onCheckedChange); // As noted above, in onSuccess we want to save the callback // object in an associative array indexed by CSS file name so that // we can purge the link nodes later if the CSS file needs to be // removed. var onSuccess = function(o) { 

   tIds[o.data] = o;
   YAHOO.log("CSS was successfully returned; our object containing transaction ids now looks like this: " + YAHOO.lang.dump(tIds, 1), "info", "example");

} })(); </script> <script src="yui_2.7.0b-assets/get-assets/getNews.js" type="text/javascript"></script>

</body> </html> 


 </source>

<A href="http://www.wbex.ru/Code/JavaScriptDownload/yui_2.7.0b.zip">yui_2.7.0b.zip( 4,431 k)</a>


Using getElementsByClassName

   <source lang="html4strict">


<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd"> <html> <head> 

   <meta http-equiv="content-type" content="text/html; charset=utf-8">

<title>Using getElementsByClassName</title> <style type="text/css"> /*margin and padding on body element 

 can introduce errors in determining
 element position and are not recommended;
 we turn them off as a foundation for YUI
 CSS treatments. */

body { 

 margin:0;
 padding:0;

} </style> <link rel="stylesheet" type="text/css" href="yui_2.7.0b-lib/fonts/fonts-min.css" /> <script type="text/javascript" src="yui_2.7.0b-lib/yahoo-dom-event/yahoo-dom-event.js"></script>


<style type="text/css">

  1. foo {
   margin-bottom:1em;

} </style>

</head> <body class=" yui-skin-sam">

Using getElementsByClassName

Clicking the document will use Dom"s getElementsByClassName method to collect all of the elements with the class bar applied.

div class="bar"
div class="bar-baz"
div class="bar "
div class=" bar "
div class=" bar baz"
div class=" bar2 baz"
div class="foo"
div class="foo" id="bar"
div class="foo bar baz"

p class="bar"

<button id="demo-run">run</button> <script type="text/javascript"> (function() { 

   var getByClass = function(e) {
       alert("found: " + YAHOO.util.Dom.getElementsByClassName("bar", "div").length + " elements");
   };
   YAHOO.util.Event.on("demo-run", "click", getByClass);
   YAHOO.log("The example has finished loading; as you interact with it, you"ll see log messages appearing here.", "info", "example");

})(); </script>

</body> </html> 


 </source>

<A href="http://www.wbex.ru/Code/JavaScriptDownload/yui_2.7.0b.zip">yui_2.7.0b.zip( 4,431 k)</a>


Using StyleSheet to create a page theme

   <source lang="html4strict">


<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd"> <html> <head> 

   <meta http-equiv="content-type" content="text/html; charset=utf-8">

<title>Using StyleSheet to create a page theme</title> <style type="text/css"> /*margin and padding on body element 

 can introduce errors in determining
 element position and are not recommended;
 we turn them off as a foundation for YUI
 CSS treatments. */

body { 

 margin:0;
 padding:0;

} </style> <link rel="stylesheet" type="text/css" href="yui_2.7.0b-lib/slider/assets/skins/sam/slider.css" /> <link rel="stylesheet" type="text/css" href="yui_2.7.0b-lib/fonts/fonts-min.css" /> <link rel="stylesheet" type="text/css" href="yui_2.7.0b-lib/colorpicker/assets/skins/sam/colorpicker.css" /> <script type="text/javascript" src="yui_2.7.0b-lib/yahoo-dom-event/yahoo-dom-event.js"></script> <script type="text/javascript" src="yui_2.7.0b-lib/dragdrop/dragdrop-min.js"></script> <script type="text/javascript" src="yui_2.7.0b-lib/slider/slider-min.js"></script> <script type="text/javascript" src="yui_2.7.0b-lib/element/element-min.js"></script> <script type="text/javascript" src="yui_2.7.0b-lib/colorpicker/colorpicker-min.js"></script> <script type="text/javascript" src="yui_2.7.0b-lib/stylesheet/stylesheet-min.js"></script>

</head> <body class=" yui-skin-sam">

Using StyleSheet to create a page theme

In this example, we"ll change some colors in this page"s color theme. Enter any valid CSS color value into the inputs and submit the cahnges to see them applied to the page.

   <form id="demo_form" action="#" method="get">
       <fieldset>

Example values: #123456 or #123 or rgb(0,10,30) or red

           <label for="demo_headings">Headings and labels</label>
               <input type="text" size="7" id="demo_headings" value="#e76300">

<code>h1,h2,h3,h4,h5,h6,
#demo label {
    color: <em id="demo_heading_value">#e76300</em>;
}</code>
           <label for="demo_bg">Demo background</label>
               <input type="text" size="7" id="demo_bg" value="#89d">

<code>.example .promo {
    background-color: <em id="demo_background_value">#89d</em>;
}</code>
           <label for="demo_highlight">Left nav highlight</label>
               <input type="text" size="7" id="demo_highlight" value="#f82">

<code>#toc ul li.active,
#toc ul li a:hover {
    background-color: <em id="demo_highlight_value">#f82</em>;
}</code>
       </fieldset>

<input type="submit" id="update" value="Update theme"> 

   </form>

<script type="text/javascript"> (function () { // Some shortcuts var Dom = YAHOO.util.Dom, 

   trim       = YAHOO.lang.trim,
   Demo;

Demo = YAHOO.namespace("demo").PageTheme = { 

   theme : null,
   
   headings   : null,
   background : null,
   highlight  : null,
   isValidColor : function (v) {
       return /^#[0-9a-f]{3}(?:[0-9a-f]{3})?$/i.test(v) ||
              /^rgb\(\s*\d+\s*,\s*\d+\s*,\s*\d+\s*\)$/.test(v) ||
              /^[a-z]+$/i.test(v);
   },
   init : function () {
       // Create a new StyleSheet instance for us to override some current
       // page styles.  For illustration, seed it with the CSS to style the
       // demo form
       Demo.theme = YAHOO.util.StyleSheet("\
           #demo form,\
           #demo fieldset {\
               border: none; padding: 0; margin: 0;\
           }\
           #demo fieldset p {\
               background: #fff;\
               border: 1px solid #ccc;\
               padding: 1em 1ex;\
           }\
           #demo pre code {\
               background: #fff;\
               border: 1px solid #ccc;\
               color: #555;\
               display: block;\
               font-weight: normal;\
               margin: 1ex 0 1em;\
               padding: 1ex;\
           }\
           #demo label {\
               font-weight: bold;\
               color: #e76300;\
           }\
           #demo pre code em {\
               color: #000;\
               font-weight: bold;\
           }\
       ");
       // Store the input fields for value retrieval
       Demo.headings   = Dom.get("demo_headings");
       Demo.background = Dom.get("demo_bg");
       Demo.highlight  = Dom.get("demo_highlight");
       // Set up the submit handler to update the page styles
       YAHOO.util.Event.on("demo_form","submit", function (e) {
           YAHOO.util.Event.stopEvent(e);
           Demo.update();
       });
   },
   update : function () {
       var v = trim(Demo.headings.value);
       if (Demo.isValidColor(v)) {
           // multiple selectors are delimited by commas
           Demo.theme.set("h1,h2,h3,h4,h5,h6, #demo label", { color : v });
           Dom.get("demo_heading_value").innerHTML = v;
       }
       v = trim(Demo.background.value);
       if (Demo.isValidColor(v)) {
           // use camelCase for style property names
           Demo.theme.set(".example .promo", { backgroundColor : v });
           Dom.get("demo_background_value").innerHTML = v;
       }
       v = trim(Demo.highlight.value);
       if (Demo.isValidColor(v)) {
           Demo.theme.set(
               "#toc ul li.selected,"+
               "#toc ul li a:hover", { backgroundColor : v });
           Dom.get("demo_highlight_value").innerHTML = v;
       }
   }

}; // Initialize the interface when the DOM is ready YAHOO.util.Event.onDOMReady(Demo.init); })(); </script>

</body> </html> 


 </source>

<A href="http://www.wbex.ru/Code/JavaScriptDownload/yui_2.7.0b.zip">yui_2.7.0b.zip( 4,431 k)</a>

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