HTML <output> formAttribute
Examples
An <output> element located outside the form (but still part of the form):
<form action="demo_form.html" id="numform"
oninput="x.value=parseInt(a.value)+parseInt(b.value)">0
<input type="range" id="a" name="a" value="50">100
+<input type="number" id="b" name="b" value="50">
<br><br>
<input type="submit">
</form>
<output form="numform" name="x" for="a b"></output>
oninput="x.value=parseInt(a.value)+parseInt(b.value)">0
<input type="range" id="a" name="a" value="50">100
+<input type="number" id="b" name="b" value="50">
<br><br>
<input type="submit">
</form>
<output form="numform" name="x" for="a b"></output>
Try it yourself »
Browser Support
Almost all mainstream browsers do not support the form attribute.
Definition and Usage
The form attribute specifies one or more forms to which the <output> element belongs.
Differences between HTML 4.01 and HTML5
The <output> tag is new in HTML5.
Syntax
<output form="form_id">
Attribute Values
| Value | Description |
|---|---|
| form_id | Specifies a space-separated list of id(s) of one or more forms to which the <output> element belongs. |
HTML <output> Tag Other Extensions