HTML 5 <output> Tag

The HTML <output> tag is used for representing the result of a calculation or user action. This could inlude 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.

The <output> tag was introduced in HTML 5.

Example

This example uses the <output> element 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.

<form onsubmit="return false" oninput="amount.value = (principal.valueAsNumber * rate.valueAsNumber) / 100">
<fieldset>  
<legend style="font-weight:bold;">Interest Calculator</legend>
<label for="principal">Amount to invest: $</label>
<input type="number" min="0" id="principal" name="principal" value="1000">
<p><label for="rate">Interest Rate: </label>
<input type="range" min="0" max="20" id="rate" name="rate" value="0" oninput="thisRate.value = rate.value">
<output name="thisRate" for="rate">0</output><span>%</span></p>
<p>Interest Received: <strong>$<output name="amount" for="principal rate">0</output></strong></p>
</fieldset>
</form>

Attributes

HTML tags can contain one or more attributes. Attributes are added to a tag to provide the browser with more information about how the tag should appear or behave. Attributes consist of a name and a value separated by an equals (=) sign, with the value surrounded by double quotes. Here's an example, style="color:black;".

There are 3 kinds of attributes that you can add to your HTML tags: Element-specific, global, and event handler content attributes.

The attributes that you can add to this tag are listed below.

Element-Specific Attributes

The following table shows the attributes that are specific to this 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 HTML 5 tags.

accesskey
class
contenteditable
contextmenu
dir
draggable
dropzone
hidden
id
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.

Here are the standard HTML 5 event handler content attributes.

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.

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