HTML <output> Tag
The HTML <output> tag represents the result of a calculation or user action. This could include displaying the results of a calculation performed by a script, or it could display the output of a user's interaction with a form element.
Syntax
The <output> tag is written as <output></output> with any contents inserted between the start and end tags.
The for attribute can be used to specify an explicit relationship to be made between the result of a calculation and the elements that represent the values that went into the calculation or that otherwise influenced the calculation.
The form attribute can be specified to associate the <output> element to its form owner.
The name attribute can also be used to provide a name for the element.
Like this:
Example
This example uses the <output> tag to display the result of an interest rate calculation, based on user input. The <output> element is also used to display the result of the range slider as the user adjusts the interest rate.
Attributes
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.
The <output> element accepts the following attributes.
Element-Specific Attributes
This table shows the attributes that are specific to the <output> tag/element.
| Attribute | Description |
|---|---|
| for | Allows an explicit relationship to be made between the result of a calculation and the elements that represent the values that went into the calculation or that otherwise influenced the calculation. The value must be a list of IDs (separated by a space) of elements within the same document. |
| form | Associates the output with a form. |
| name | Specifies the name of this element. |
Global Attributes
The following attributes are standard across all HTML5 elements. Therefore, you can use these attributes with the <output> tag , as well as with all other HTML tags.
- accesskey
- class
- contenteditable
- contextmenu
- dir
- draggable
- dropzone
- hidden
- id
- inert
- itemid
- itemprop
- itemref
- itemscope
- itemtype
- lang
- spellcheck
- style
- tabindex
- title
- translate
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 <output> element, as well as any other HTML5 element.
- onabort
- oncancel
- onblur
- oncanplay
- oncanplaythrough
- onchange
- onclick
- oncontextmenu
- ondblclick
- ondrag
- ondragend
- ondragenter
- ondragexit
- ondragleave
- ondragover
- ondragstart
- ondrop
- ondurationchange
- onemptied
- onended
- onerror
- onfocus
- onformchange
- onforminput
- oninput
- oninvalid
- onkeydown
- onkeypress
- onkeyup
- onload
- onloadeddata
- onloadedmetadata
- onloadstart
- onmousedown
- onmousemove
- onmouseout
- onmouseover
- onmouseup
- onmousewheel
- onpause
- onplay
- onplaying
- onprogress
- onratechange
- onreadystatechange
- onscroll
- onseeked
- onseeking
- onselect
- onshow
- onstalled
- onsubmit
- onsuspend
- ontimeupdate
- onvolumechange
- onwaiting
For a full explanation of these attributes, see HTML 5 event handler content attributes.
Differences Between HTML 4 & HTML 5
The <output> tag is new in HTML5.
For more information on this element, see HTML5 <output> Tag. Also check out the links to the official specifications below.
Template
Here's a template for the <output> 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 <output> Tag.
Tag Details
For more details about the <output> tag, see HTML5 <output> Tag.
Specifications
Here are the official specifications for the <output> element.
- 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.