HTML <input> form Attribute
Example
An input field located outside the HTML form (but still a part of the form):
    <form action="/action_page.php" id="form1">
   <label for="fname">First name:</label>
  <input type="text" id="fname" 
    name="fname"><br><br>
  <input type="submit" value="Submit">
</form>
    <label for="lname">Last name:</label>
<input type="text" id="lname" 
    name="lname" form="form1">
Try it Yourself »
Definition and Usage
The form attribute specifies the form the 
<input> element belongs to.
Browser Support
The numbers in the table specify the first browser version that fully supports the attribute.
| Attribute | |||||
|---|---|---|---|---|---|
| form | Yes | Yes | Yes | 5.1 | 10.6 | 
Syntax
 
  <input form="form_id">
 
Attribute Values
| Value | Description | 
|---|---|
| form_id | Specifies the form element the <input> element belongs to. The value of this attribute must be the id attribute of a <form> element in the same document. | 
❮ HTML <input> tag
 
