Easy-to-follow video tutorials help you learn software, creative, and business skills.Become a member

What's available in HTML5

From: Working with Data on the Web

Video: What's available in HTML5

While HTML5 is not a technology dedicated purely to managing data on the web, the advances in that regard and the latest version of our most basic web language are substantial. In this lesson, we'll take a look at the key enhancements that make it far easier to work with data on the web. The primary data-oriented features in HTML5 are a slew of new input types. The ability to store and retrieve data on the client side, the multipurpose data attribute, and the new data list tag.

What's available in HTML5

While HTML5 is not a technology dedicated purely to managing data on the web, the advances in that regard and the latest version of our most basic web language are substantial. In this lesson, we'll take a look at the key enhancements that make it far easier to work with data on the web. The primary data-oriented features in HTML5 are a slew of new input types. The ability to store and retrieve data on the client side, the multipurpose data attribute, and the new data list tag.

Let's break those down starting with the input types. There are in all 13 new input types including URL, date, tel for telephone and e-mail. Most are partially supported in modern browsers with the primary changes coming in mobile browsers. Input types are covered in depth in Chapter 1. Local storage is a particularly useful HTML5 data-related feature, largely because it adds the ability to maintain state without resorting to server side technology.

That means if some data has been saved using local storage and its displayed on the webpage, if you close your browser and then reopen it, the data can be retrieved and displayed again. Unlike cookies, local storage is handled on a per browser basis. And the capacity is much larger, 5 MB versus 4 kb for cookies. Local storage uses a basic name value pair structure and is limited to strings. The two most common commands for local storage are very straightforward.

setItem takes two arguments, the ItemName and its value. While getItem only needs the name of the item to retrieve it. We'll continue to explore local storage later in this chapter. One of the more annoying problems with earlier versions of HTML, was that there was no way to add custom attributes to an element without invalidating the code. That problem is gone with the introduction of the data attribute. You can create any custom attribute you need, just add the data- prefix.

This gives developers the ability to create application data hidden from the user. The data can be read and defined using standard JavaScript functions, getAttribute and setAttribute. There's also a dedicated new JavaScript API property called dataset, which is gaining popularity and support in the current crop of browsers. Let's take a look at a couple of examples of the data attribute. In the first line of code, we set the initial opacity for an image using our custom data-opacity attribute.

Now this opens the door for further JavaScript manipulation. The next two lines of code illustrate how divs could be set up for dynamic charting by SVG or Canvas through the application of the data-country and data-size attributes. Best of all, everything is perfectly valid HTML. I'll show you how to use it later in this chapter. Another data-related element you should be aware of is datalist. datalist defines the autocomplete options for a certain targeted select list, as you can see from the code depicted here.

To apply a datalist to a select list, you use the new list attribute with the ID of the datalist as its value. Unfortunately, datalist has, for whatever reason, not garnered support in the current iOS browser set. So in my view, its use is still pretty restricted and we're not going to dive into it any more in this chapter. Now that you're armed with an overview of what's hot data-wise in HTML5, you're ready to put some of that knowledge to work in the next lesson.

Show transcript

This video is part of

Image for Working with Data on the Web
Working with Data on the Web

25 video lessons · 10294 viewers

Joseph Lowery
Author

 

Start learning today

Get unlimited access to all courses for just $25/month.

Become a member
Sometimes @lynda teaches me how to use a program and sometimes Lynda.com changes my life forever. @JosefShutter
@lynda lynda.com is an absolute life saver when it comes to learning todays software. Definitely recommend it! #higherlearning @Michael_Caraway
@lynda The best thing online! Your database of courses is great! To the mark and very helpful. Thanks! @ru22more
Got to create something yesterday I never thought I could do. #thanks @lynda @Ngventurella
I really do love @lynda as a learning platform. Never stop learning and developing, it’s probably our greatest gift as a species! @soundslikedavid
@lynda just subscribed to lynda.com all I can say its brilliant join now trust me @ButchSamurai
@lynda is an awesome resource. The membership is priceless if you take advantage of it. @diabetic_techie
One of the best decision I made this year. Buy a 1yr subscription to @lynda @cybercaptive
guys lynda.com (@lynda) is the best. So far I’ve learned Java, principles of OO programming, and now learning about MS project @lucasmitchell
Signed back up to @lynda dot com. I’ve missed it!! Proper geeking out right now! #timetolearn #geek @JayGodbold
Share a link to this course

What are exercise files?

Exercise files are the same files the author uses in the course. Save time by downloading the author's files instead of setting up your own files, and learn by following along with the instructor.

Can I take this course without the exercise files?

Yes! If you decide you would like the exercise files later, you can upgrade to a premium account any time.

Become a member Download sample files See plans and pricing

Please wait... please wait ...
Upgrade to get access to exercise files.

Exercise files video

How to use exercise files.

Learn by watching, listening, and doing, Exercise files are the same files the author uses in the course, so you can download them and follow along Premium memberships include access to all exercise files in the library.


Exercise files

Exercise files video

How to use exercise files.

For additional information on downloading and using exercise files, watch our instructional video or read the instructions in the FAQ .

This course includes free exercise files, so you can practice while you watch the course. To access all the exercise files in our library, become a Premium Member.

Are you sure you want to mark all the videos in this course as unwatched?

This will not affect your course history, your reports, or your certificates of completion for this course.


Mark all as unwatched Cancel

Congratulations

You have completed Working with Data on the Web.

Return to your organization's learning portal to continue training, or close this page.


OK
Become a member to add this course to a playlist

Join today and get unlimited access to the entire library of video courses—and create as many playlists as you like.

Get started

Already a member ?

Become a member to like this course.

Join today and get unlimited access to the entire library of video courses.

Get started

Already a member?

Exercise files

Learn by watching, listening, and doing! Exercise files are the same files the author uses in the course, so you can download them and follow along. Exercise files are available with all Premium memberships. Learn more

Get started

Already a Premium member?

Exercise files video

How to use exercise files.

Ask a question

Thanks for contacting us.
You’ll hear from our Customer Service team within 24 hours.

Please enter the text shown below:

The classic layout automatically defaults to the latest Flash Player.

To choose a different player, hold the cursor over your name at the top right of any lynda.com page and choose Site preferences from the dropdown menu.

Continue to classic layout Stay on new layout
Exercise files

Access exercise files from a button right under the course name.

Mark videos as unwatched

Remove icons showing you already watched videos if you want to start over.

Control your viewing experience

Make the video wide, narrow, full-screen, or pop the player out of the page into its own window.

Interactive transcripts

Click on text in the transcript to jump to that spot in the video. As the video plays, the relevant spot in the transcript will be highlighted.

Are you sure you want to delete this note?

No

Your file was successfully uploaded.

Thanks for signing up.

We’ll send you a confirmation email shortly.


Sign up and receive emails about lynda.com and our online training library:

Here’s our privacy policy with more details about how we handle your information.

Keep up with news, tips, and latest courses with emails from lynda.com.

Sign up and receive emails about lynda.com and our online training library:

Here’s our privacy policy with more details about how we handle your information.

   
submit Lightbox submit clicked
Terms and conditions of use

We've updated our terms and conditions (now called terms of service).Go
Review and accept our updated terms of service.