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HTML5 Form Elements



HTML5 New Form Elements

HTML5 has the following new form elements:

  • <datalist>
  • <keygen>
  • <output>

Note: Not all major browsers support all the new form elements. However, you can already start using them; If they are not supported, they will behave as regular text fields.


HTML5 <datalist> Element

The <datalist> element specifies a list of pre-defined options for an <input> element.

The <datalist> element is used to provide an "autocomplete" feature on <input> elements. Users will see a drop-down list of pre-defined options as they input data.

Use the <input> element's list attribute to bind it together with a <datalist> element.

OperaSafariChromeFirefoxInternet Explorer

Example

An <input> element with pre-defined values in a <datalist>:



Here is the code:

<form action="demo_form.php" method="get">

<input list="browsers" name="browser">
<datalist id="browsers">
<option value="Internet Explorer">
<option value="Firefox">
<option value="Chrome">
<option value="Opera">
<option value="Safari">
</datalist>
<input type="submit"></form>

HTML5 <keygen> Element

The purpose of the <keygen> element is to provide a secure way to authenticate users.

The <keygen> tag specifies a key-pair generator field in a form.

When the form is submitted, two keys are generated, one private and one public.

The private key is stored locally, and the public key is sent to the server. The public key could be used to generate a client certificate to authenticate the user in the future.

OperaSafariChromeFirefoxInternet Explorer

Example

Username: Encryption:


<form action="demo_keygen.php" method="get">
Username: <input type="text" name="usr_name">
Encryption: <keygen name="security">
<input type="submit">
</form>

HTML5 <output> Element

The <output> element represents the result of a calculation (like one performed by a script).

OperaSafariChromeFirefoxInternet Explorer

Example

0 100 + =


<form oninput="x.value=parseInt(a.value)+parseInt(b.value)">0
<input type="range" id="a" value="50">100 +
<input type="number" id="b" value="50">=
<output name="x" for="a b"></output>
</form>

HTML5 New Form Elements

Tag Description
<datalist> Specifies a list of pre-defined options for an <input> element
<keygen> Specifies a key-pair generator field in a form
<output> Represents the result of a calculation