DotNetStories
Scrolling an HTML 5 page using JQuery
In this post I will show you how to use JQuery to scroll through an HTML 5 page.I had to help a friend of mine to implement this functionality and I thought it would be a good idea to write a post.
I will not use any JQuery scrollbar plugin,I will just use the very popular JQuery Library. Please download the library (minified version) from http://jquery.com/download.
Please find here all my posts regarding JQuery.Also have a look at my posts regarding HTML 5.
In order to be absolutely clear this is not (and could not be) a detailed tutorial on HTML 5. There are other great resources for that.Navigate to the excellent interactive tutorials of W3School.
Another excellent resource is HTML 5 Doctor.
Two very nice sites that show you what features and specifications are implemented by various browsers and their versions are http://caniuse.com/ and http://html5test.com/. At this times Chrome seems to support most of HTML 5 specifications.Another excellent way to find out if the browser supports HTML 5 and CSS 3 features is to use the Javascript lightweight library Modernizr.
In this hands-on example I will be using Expression Web 4.0.This application is not a free application. You can use any HTML editor you like.You can use Visual Studio 2012 Express edition. You can download it here.
Let me move on to the actual example.
This is the sample HTML 5 page
<!DOCTYPE html>
<html lang="en">
<head>
<title>Liverpool Legends</title>
<meta http-equiv="Content-Type" content="text/html;charset=utf-8" >
<link rel="stylesheet" type="text/css" href="style.css">
<script type="text/javascript" src="jquery-1.8.2.min.js"> </script>
<script type="text/javascript" src="scroll.js">
</script>
</head>
<body>
<header>
<h1>Liverpool Legends</h1>
</header>
<div id="main">
<table>
<caption>Liverpool Players</caption>
<thead>
<tr>
<th>Name</th>
<th>Photo</th>
<th>Position</th>
<th>Age</th>
<th>Scroll</th>
</tr>
</thead>
<tfoot class="footnote">
<tr>
<td colspan="4">We will add more photos soon</td>
</tr>
</tfoot>
<tbody>
<tr class="maintop">
<td>Alan Hansen</td>
<td>
<figure>
<img src="images\Alan-hansen-large.jpg" alt="Alan Hansen">
<figcaption>The best Liverpool Defender <a href="http://en.wikipedia.org/wiki/Alan_Hansen">Alan Hansen</a></figcaption>
</figure>
</td>
<td>Defender</td>
<td>57</td>
<td class="top">Middle</td>
</tr>
<tr>
<td>Graeme Souness</td>
<td>
<figure>
<img src="images\graeme-souness-large.jpg" alt="Graeme Souness">
<figcaption>Souness was the captain of the successful Liverpool team of the early 1980s <a href="http://en.wikipedia.org/wiki/Graeme_Souness">Graeme Souness</a></figcaption>
</figure>
</td>
<td>MidFielder</td>
<td>59</td>
</tr>
<tr>
<td>Ian Rush</td>
<td>
<figure>
<img src="images\ian-rush-large.jpg" alt="Ian Rush">
<figcaption>The deadliest Liverpool Striker <a href="http://it.wikipedia.org/wiki/Ian_Rush">Ian Rush</a></figcaption>
</figure>
</td>
<td>Striker</td>
<td>51</td>
</tr>
<tr class="mainmiddle">
<td>John Barnes</td>
<td>
<figure>
<img src="images\john-barnes-large.jpg" alt="John Barnes">
<figcaption>The best Liverpool Defender <a href="http://en.wikipedia.org/wiki/John_Barnes_(footballer)">John Barnes</a></figcaption>
</figure>
</td>
<td>MidFielder</td>
<td>49</td>
<td class="middle">Bottom</td>
</tr>
<tr>
<td>Kenny Dalglish</td>
<td>
<figure>
<img src="images\kenny-dalglish-large.jpg" alt="Kenny Dalglish">
<figcaption>King Kenny <a href="http://en.wikipedia.org/wiki/Kenny_Dalglish">Kenny Dalglish</a></figcaption>
</figure>
</td>
<td>Midfielder</td>
<td>61</td>
</tr>
<tr>
<td>Michael Owen</td>
<td>
<figure>
<img src="images\michael-owen-large.jpg" alt="Michael Owen">
<figcaption>Michael was Liverpool's top goal scorer from 1997–2004 <a href="http://www.michaelowen.com/">Michael Owen</a></figcaption>
</figure>
</td>
<td>Striker</td>
<td>33</td>
</tr>
<tr>
<td>Robbie Fowler</td>
<td>
<figure>
<img src="images\robbie-fowler-large.jpg" alt="Robbie Fowler">
<figcaption>Fowler scored 183 goals in total for Liverpool <a href="http://en.wikipedia.org/wiki/Robbie_Fowler">Robbie Fowler</a></figcaption>
</figure>
</td>
<td>Striker</td>
<td>38</td>
</tr>
<tr class="mainbottom">
<td>Steven Gerrard</td>
<td>
<figure>
<img src="images\steven-gerrard-large.jpg" alt="Steven Gerrard">
<figcaption>Liverpool's captain <a href="http://en.wikipedia.org/wiki/Steven_Gerrard">Steven Gerrard</a></figcaption>
</figure>
</td>
<td>Midfielder</td>
<td>32</td>
<td class="bottom">Top</td>
</tr>
</tbody>
</table>
</div>
<footer>
<p>All Rights Reserved</p>
</footer>
</body>
</html>
The markup is very easy to follow and understand. You do not have to type all the code,simply copy and paste it.For those that you are not familiar with HTML 5, please take a closer look at the new tags/elements introduced with HTML 5.
When I view the HTML 5 page with Firefox I see the following result.
I have also an external stylesheet (style.css).
body{
background-color:#efefef;
}
h1{
font-size:2.3em;
}
table {
border-collapse: collapse;
font-family: Futura, Arial, sans-serif;
}
caption {
font-size: 1.2em;
margin: 1em auto;
}
th, td {
padding: .65em;
}
th, thead {
background: #000;
color: #fff;
border: 1px solid #000;
}
tr:nth-child(odd)
{
background: #ccc;
}
tr:nth-child(even)
{
background: #404040;
}
td
{
border-right: 1px solid #777;
}
table
{
border: 1px solid #777;
}
.top, .middle, .bottom
{
cursor: pointer;
font-size: 22px;
font-weight: bold;
text-align: center;
}
.footnote
{
text-align:center;
font-family:Tahoma;
color:#EB7515;
}
a{color:#22577a;text-decoration:none;}
a:hover {color:#125949; text-decoration:none;}
footer
{
background-color:#505050;
width:1150px;
}
These are just simple CSS Rules that style the various HTML 5 tags,classes.
The jQuery code that makes it all possible resides inside the scroll.js file.Make sure you type everything correctly.
$(document).ready(function() {
$('.top').click(function(){
$('html, body').animate({
scrollTop: $(".mainmiddle").offset().top
},4000 );
});
$('.middle').click(function(){
$('html, body').animate({
scrollTop: $(".mainbottom").offset().top
},4000);
});
$('.bottom').click(function(){
$('html, body').animate({
scrollTop: $(".maintop").offset().top
},4000);
});
});
Let me explain what I am doing here.When I click on the Middle word ( $('.top').click(function(){ ) this relates to the top class that is clicked.
Then we declare the elements that we want to participate in the scrolling. In this case is html,body ( $('html, body').animate).These elements will be part of the vertical scrolling.
In the next line of code we simply move (navigate) to the element (class mainmiddle that is attached to a tr element.)
scrollTop: $(".mainmiddle").offset().top
Make sure you type all the code correctly and try it for yourself. I have tested this solution will all 4-5 major browsers.
Hope it helps!!!