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HTML form Attribute


Definition and Usage

The form attribute specifies the form the element belongs to.

The value of this attribute must be equal to the id attribute of a <form> element in the same document.


Applies to

The form attribute can be used on the following elements:

Elements Attribute
<button> form
<fieldset> form
<input> form
<label> form
<meter> form
<object> form
<output> form
<select> form
<textarea> form

Examples

Button Example

A button located outside a form (but still a part of the form):

<form action="/action_page.php" method="get" id="form1">
  First name: <input type="text" name="fname"><br>
  Last name: <input type="text" name="lname"><br>
</form>

<button type="submit" form="form1" value="Submit">Submit</button>
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Fieldset Example

A <fieldset> element located outside a form (but still a part of the form):

<form action="/action_page.php" method="get" id="form1">
  What is your favorite color? <input type="text" name="fav_color"><br>
  <input type="submit">
</form>

<fieldset form="form1">
  Name: <input type="text" name="username"><br>
  Email: <input type="text" name="usermail"><br>
</fieldset>
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Input Example

An input field located outside the HTML form (but still a part of the form):

<form action="/action_page.php" id="form1">
  First name: <input type="text" name="fname"><br>
  <input type="submit" value="Submit">
</form>

Last name: <input type="text" name="lname" form="form1">
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Label Example

A <label> element located outside a form (but still a part of the form):

<form action="/action_page.php" id="form1">
  <input type="radio" name="gender" id="male" value="male"><br>
  <label for="female">Female</label>
  <input type="radio" name="gender" id="female" value="female"><br>
  <label for="other">Other</label>
  <input type="radio" name="gender" id="other" value="other"><br><br>
  <input type="submit" value="Submit">
</form>

<label for="male" form="form1">Male</label>
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Meter Example

A <meter> element located outside a form (but still a part of the form):

<form action="/action_page.php" method="get" id="form1">
  First name: <input type="text" name="fname"><br>
  <input type="submit" value="Submit">
</form>

<meter form="form1" name="x1" min="0" low="40" high="90" max="100" value="95"></meter>
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Object Example

An <object> element located outside a form (but still a part of the form):

<form action="/action_page.php" id="form1">
  First name: <input type="text" name="fname"><br>
  <input type="submit" value="Submit">
</form>

<object data="helloworld.swf" height="400" width="400" form="form1" name="obj1"></object>
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Output Example

An <output> element located outside a form (but still a part of the form):

<form action="/action_page.php" 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>
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Select Example

A drop-down list located outside a form (but still a part of the form):

<form action="/action_page.php" id="carform">
  Firstname:<input type="text" name="fname">
  <input type="submit">
</form>

<select name="carlist" form="carform">
  <option value="volvo">Volvo</option>
  <option value="saab">Saab</option>
  <option value="opel">Opel</option>
  <option value="audi">Audi</option>
</select>
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Textarea Example

A text area located outside a form (but still a part of the form):

<form action="/action_page.php" id="usrform">
  Name: <input type="text" name="usrname">
  <input type="submit">
</form>

<textarea name="comment" form="usrform">Enter text here...</textarea>
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Browser Support

The form attribute has the following browser support for each element:

Element
button 10.0 Not supported 4.0 5.1 9.5
fieldset Not supported Not supported Not supported Not supported Not supported
input 9.0 Not supported 4.0 5.1 10.6
label Yes Yes Yes Yes Yes
meter Not supported Not supported Not supported Not supported Not supported
object Not supported Not supported Not supported Not supported Not supported
output Yes Not supported Yes Yes Yes
select Yes Not supported Yes Yes Yes
textarea Yes Not supported Yes Yes Yes