<output>: The OUTPUT Element
Last updated: 2026-10-13
<output>The OUTPUT Element
Represents the result of a calculation or user action, often showing live output from a form via JavaScript; the for attribute lists the inputs used.
| Category | Forms |
|---|---|
| Content Model | Flow content |
| Allowed Parents | Any element that accepts flow content |
| Content Tag | Yes — requires closing </output> tag |
| Status | Standard |
📝 Syntax
<output name="result">0</output>⚙️ Attributes
This element supports the global attributes plus the following:
| Attribute | Value | Description |
|---|---|---|
for | Space-separated ids of elements that contributed to the result. | |
form | The id of the owning form (may be outside it). | |
name | Field name used when submitting the form. |
▶ Example
Edit the code below and see the live result in the playground:
🌐 Browser Support
| Browser |  Chrome |
 Edge |
 Firefox |
 Safari |
 Opera |
|---|---|---|---|---|---|
| <output> | ✓ v1 | ✓ v12 | ✓ v1 | ✓ v1 | ✓ v1 |
| Supported in all major browsers | |||||
Tip： output is not editable but is reset by form reset; it only displays the result.
❓ FAQ
QWhat does the output tag do?
A
<output> displays the result of a calculation or user action — typically a slider's linked value or a live form total: <output for='a b'>30</output> where for lists the contributing control ids. It carries aria-live semantics, so value changes get announced.QWhy use output instead of a span for results?
A
<output> means result and defaults to aria-live='polite' (changes are announced automatically); a span has neither. Use output for computed and linked values, span for static text — both semantics and accessibility improve.QIs the for attribute required on output?
ANo. For single-control linkage (a value next to a slider) you can omit for; when several controls determine the result (like a+b), write
for='a b' with space-separated ids to make the relationship explicit.🏷️ Related Tags
💡 Related Cases
More case studies coming soon — check back later.
📚 Related Tutorials
