HTML <data> Tag
<data> tag represents a machine-readable version of its own contents. This can be useful in cases where you need the contents provided in an alternative format.
For example, you might have a script that requires data in a certain format, however, this format is not very user friendly. Using the
<data> tag, you can provide the value in two different formats; a machine readable format, and a user-friendly format (eg,
Ten). You could also provide two different values, as long as they represent the same thing (for example, a book ID and a book title that both represent the same book).
If the value is date or time related, use the
<time> tag instead.
<data> tag is written as
</data> with the user friendly contents inserted between the start and end tags. The
value attribute provides the machine-readable value.
A typical usage scenario would be when displaying a list of products. Each product has a unique product ID. But the product ID is a lengthy number so it's not so user-friendly. Using the
<data> tag, you can place the product ID into the
value attribute, and place the product's title between the start and end tags.
You can also use the
<data> tag to represent numbers expressed in two different ways (eg,
Attributes can be added to an HTML element to provide more information about how the element should appear or behave.
There are 3 kinds of attributes that you can add to your HTML tags: Element-specific, global, and event handler content attributes.
<data> element accepts the following attributes.
This table shows the attributes that are specific to the
|value||Provides a machine-readable version of the element's contents. Required attribute.|
The following attributes are standard across all HTML5 elements. Therefore, you can use these attributes with the
<data> tag , as well as with all other HTML tags.
For a full explanation of these attributes, see HTML 5 global attributes.
Event Handler Content Attributes
Event handler content attributes enable you to invoke a script from within your HTML. The script is invoked when a certain "event" occurs. Each event handler content attribute deals with a different event.
Below are the standard HTML5 event handler content attributes.
Again, you can use any of these with the
<data> element, as well as any other HTML5 element.
For a full explanation of these attributes, see HTML 5 event handler content attributes.
Differences Between HTML 4 & HTML 5
<data> tag is new in HTML5.
For more detail, see HTML5
<data> Tag. Also check out the links to the official specifications below.
Here's a template for the
<data> tag with all available attributes for the tag (based on HTML5). These are grouped into attribute types, each type separated by a space. In many cases, you will probably only need one or two (if any) attributes. Simply remove the attributes you don't need.
For more information on attributes for this tag, see HTML5
For more details about the
<data> tag, see HTML5
Here are the official specifications for the
- HTML5 Specification (W3C)
- HTML Living Standard (WHATWG)
- Current W3C Draft (the next version that is currently being worked on)
What's the Difference?
W3C creates "snapshot" specifications that don't change once defined. So the HTML5 specification won't change once it becomes an official recommendation. WHATWG on the other hand, develops a "living standard" that is updated on a regular basis. In general, you will probably find that the HTML living standard will be more closely aligned to the current W3C draft than to the HTML5 specification.