HTML5 posts

Create a User Note-Keeping Utility For Your Site With IndexedDB: Part 1

Indexed Database (IndexedDB) is an API for storing data at client side and a proposed standard, still in the relatively early stages of development. With the IndexedDB API, developers can store data objects within the user's browser. In this tutorial series we will explore the basics of this emerging technology by building a simple note-keeping facility for a Web page or site. Users will be able to add and delete notes, with past notes automatically displaying when the user revisits. The notes are...

Baking a New Site With a Sprinkle of SEO Part 2

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In part one of Baking a New Site With a Sprinkle of SEO, we covered some of the more important things a developer can do to help their sites find their way into the top positions of the search engines. This week, we look at more advanced steps you can take to really help catapult them up to the top. Advanced: canonical tags ... You may have heard about Google’s recent algorithm updates such as Panda and Penguin. Well, one of things Panda concerned its self about was not how much sugar cane it was getting,...
CSS

Create Quick and Easy Progress Bar Charts with HTML5 and CSS3

The official January 2011 launch of the robust HTML5 has brought with it a number of powerful coding elements. Among them is the <progress> tag, a very useful tool in putting together quick, attractive online presentations. CSS3 provides a highly flexible methodology for customizing default HTML5 tags. At present, both technologies are undergoing considerable revision. ‘Pseudo-elements’, such as those prefixed by -moz- and -webkit-, were implemented within the CSS3 framework...

Displaying the Progress of Tasks with HTML5

With the progress element, HTML5 pages can display the progress of a task, for example a download or background activity. In this tutorial we will demonstrate how to use the progress element in your pages, with a simple JavaScript function updating the element as the task executes. At the moment the progress element is only really supported in Firefox, Chrome and Opera, with support developing in Internet Explorer and Safari, so you can't rely on it just yet. For demonstration, we are simply going to...

Creating A Web Page Calculator Using The HTML5 Output Element

HTML5 includes a host of new input elements, such as the output tag. Using the output tag in conjunction with the "oninput" event listener, you can create simple or complex Web page calculators, giving the user instant results. The output tag allows you to build forms using semantic markup, since the element is specifically designed for displaying calculation results. In this tutorial we will create a simple Web page calculator to demonstrate using the output element. Many of the new input elements...

Allowing Users to Edit Text Content with HTML5

With HTML5, you can set any of your Web page text elements to be editable by users. Using the "contenteditable" attribute, you can instruct the browser to allow users to insert, delete and alter the text your page contains as they view it. There are many possible uses for this technique, such as allowing users to customize the way your pages appear to them each time they visit. In this tutorial, we will run through the basics of letting users edit your text content, including saving their edits for future...

Manipulating HTML5’s native audio with JavaScript

HTML5’s native audio element will be a great way to avoid having to rely on third party plug-ins like QuickTime and Flash. The latest web browsers like Chrome 10+ and Firefox 3.6+ are already there with imbedded javascript libraries which provide methods and properties for manipulating the <audio> element. In this post, we’ll examine a few of the most important methods and discover ways to use Javascript to run audio files. NOTE:  Although this post focuses on the Audio object, these methods...
CSS

Creating First Animations With CSS3 Using Keyframes

One of the main reasons the emergence of CSS3 has been so hotly anticipated is the fact that, in combination with HTML5, it will pose a genuine alternative to technologies such as Flash. With CSS3 and HTML5, you will ultimately be able to create animated, interactive multimedia applications that will be accessible to users regardless of whether Flash is supported in their environment - great news if you're developing Web apps for iOS or for mobile users in general. In this tutorial we will create a simple...
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