HTML5 Form Attributes
HTML5 New Form Attributes
HTML5 has several new attributes for <form> and <input>.
New attributes for <form>:
- autocomplete
- novalidate
New attributes for <input>:
- autocomplete
- autofocus
- form
- formaction
- formenctype
- formmethod
- formnovalidate
- formtarget
- height and width
- list
- min and max
- multiple
- pattern (regexp)
- placeholder
- required
- step
<form> / <input> autocomplete Attribute
The autocomplete attribute specifies whether a form or input field should have autocomplete on or off.
When autocomplete is on, the browser automatically complete values based on values that the user has entered before.
Tip: It is possible to have autocomplete “on” for the form, and “off” for specific input fields, or vice versa.
Note: The autocomplete attribute works with <form> and the following <input> types: text, search, url, tel, email, password, datepickers, range, and color.
Example
An HTML form with autocomplete on (and off for one input field):
First name:<input type=”text” name=”fname”><br>
Last name: <input type=”text” name=”lname”><br>
E-mail: <input type=”email” name=”email” autocomplete=”off”><br>
<input type=”submit”>
</form>
Tip: In some browsers you may need to activate the autocomplete function for this to work.
<form> novalidate Attribute
The novalidate attribute is a boolean attribute.
When present, it specifies that the form-data (input) should not be validated when submitted.
Example
Indicates that the form is not to be validated on submit:
E-mail: <input type=”email” name=”user_email”>
<input type=”submit”>
</form>
<input> autofocus Attribute
The autofocus attribute is a boolean attribute.
When present, it specifies that an <input> element should automatically get focus when the page loads.
Example
Let the “First name” input field automatically get focus when the page loads:
<input> form Attribute
The form attribute specifies one or more forms an <input> element belongs to.
Tip: To refer to more than one form, use a space-separated list of form ids.
Example
An input field located outside the HTML form (but still a part of the form):
First name: <input type=”text” name=”fname”><br>
<input type=”submit” value=”Submit”>
</form>Last name: <input type=”text” name=”lname” form=”form1″>
<input> formaction Attribute
The formaction attribute specifies the URL of a file that will process the input control when the form is submitted.
The formaction attribute overrides the action attribute of the <form> element.
Note: The formaction attribute is used with type=”submit” and type=”image”.
Example
An HTML form with two submit buttons, with different actions:
First name: <input type=”text” name=”fname”><br>
Last name: <input type=”text” name=”lname”><br>
<input type=”submit” value=”Submit”><br>
<input type=”submit” formaction=”demo_admin.asp”
value=”Submit as admin”>
</form>
<input> formenctype Attribute
The formenctype attribute specifies how the form-data should be encoded when submitting it to the server (only for forms with method=”post”)
The formenctype attribute overrides the enctype attribute of the <form> element.
Note: The formenctype attribute is used with type=”submit” and type=”image”.
Example
Send form-data that is default encoded (the first submit button), and encoded as “multipart/form-data” (the second submit button):
First name: <input type=”text” name=”fname”><br>
<input type=”submit” value=”Submit”>
<input type=”submit” formenctype=”multipart/form-data”
value=”Submit as Multipart/form-data”>
</form>
<input> formmethod Attribute
The formmethod attribute defines the HTTP method for sending form-data to the action URL.
The formmethod attribute overrides the method attribute of the <form> element.
Note: The formmethod attribute can be used with type=”submit” and type=”image”.
Example
The second submit button overrides the HTTP method of the form:
First name: <input type=”text” name=”fname”><br>
Last name: <input type=”text” name=”lname”><br>
<input type=”submit” value=”Submit”>
<input type=”submit” formmethod=”post” formaction=”demo_post.asp”
value=”Submit using POST”>
</form>
<input> formnovalidate Attribute
The novalidate attribute is a boolean attribute.
When present, it specifies that the <input> element should not be validated when submitted.
The formnovalidate attribute overrides the novalidate attribute of the <form> element.
Note: The formnovalidate attribute can be used with type=”submit”.
Example
A form with two submit buttons (with and without validation):
E-mail: <input type=”email” name=”userid”><br>
<input type=”submit” value=”Submit”><br>
<input type=”submit” formnovalidate value=”Submit without validation”>
</form>
<input> formtarget Attribute
The formtarget attribute specifies a name or a keyword that indicates where to display the response that is received after submitting the form.
The formtarget attribute overrides the target attribute of the <form> element.
Note: The formtarget attribute can be used with type=”submit” and type=”image”.
Example
A form with two submit buttons, with different target windows:
First name: <input type=”text” name=”fname”><br>
Last name: <input type=”text” name=”lname”><br>
<input type=”submit” value=”Submit as normal”>
<input type=”submit” formtarget=”_blank”
value=”Submit to a new window”>
</form>
<input> height and width Attributes
The height and width attributes specify the height and width of an <input> element.
Note: The height and width attributes are only used with <input type=”image”>.
Tip: Always specify both the height and width attributes for images. If height and width are set, the space required for the image is reserved when the page is loaded. However, without these attributes, the browser does not know the size of the image, and cannot reserve the appropriate space to it. The effect will be that the page layout will change during loading (while the images load).
Example
Define an image as the submit button, with height and width attributes:
<input> list Attribute
The list attribute refers to a <datalist> element that contains pre-defined options for an <input> element.
Example
An <input> element with pre-defined values in a <datalist>:
<input list=”browsers”>
<datalist id=”browsers”>
<option value=”Internet Explorer”>
<option value=”Firefox”>
<option value=”Chrome”>
<option value=”Opera”>
<option value=”Safari”>
</datalist>
<input> min and max Attributes
The min and max attributes specify the minimum and maximum value for an <input> element.
Note: The min and max attributes works with the following input types: number, range, date, datetime, datetime-local, month, time and week.
Example
<input> elements with min and max values:
<input type=”date” name=”bday” max=”1979-12-31″>Enter a date after 2000-01-01:
<input type=”date” name=”bday” min=”2000-01-02″>
Quantity (between 1 and 5):
<input type=”number” name=”quantity” min=”1″ max=”5″>
<input> multiple Attribute
The multiple attribute is a boolean attribute.
When present, it specifies that the user is allowed to enter more than one value in the <input> element.
Note: The multiple attribute works with the following input types: email, and file.
Example
A file upload field that accepts multiple values:
<input> pattern Attribute
The pattern attribute specifies a regular expression that the <input> element’s value is checked against.
Note: The pattern attribute works with the following input types: text, search, url, tel, email, and password.
Example
An input field that can contain only three letters (no numbers or special characters):
<input> placeholder Attribute
The placeholder attribute specifies a short hint that describes the expected value of an input field (e.g. a sample value or a short description of the expected format).
The short hint is displayed in the input field before the user enters a value.
Note: The placeholder attribute works with the following input types: text, search, url, tel, email, and password.
Example
An input field with a placeholder text:
<input> required Attribute
The required attribute is a boolean attribute.
When present, it specifies that an input field must be filled out before submitting the form.
Note: The required attribute works with the following input types: text, search, url, tel, email, password, date pickers, number, checkbox, radio, and file.
Example
A required input field:
<input> step Attribute
The step attribute specifies the legal number intervals for an <input> element.
Example: if step=”3″, legal numbers could be -3, 0, 3, 6, etc.
Tip: The step attribute can be used together with the max and min attributes to create a range of legal values.
Note: The step attribute works with the following input types: number, range, date, datetime, datetime-local, month, time and week.
Example
An input field with a specified legal number intervals:
HTML5 <input> Tag
| Tag | Description |
|---|---|
| <form> | Defines an HTML form for user input |
| <input> | Defines an input control |
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