pattern

The pattern attribute defines a regular expression for a pattern that form data should take when submitted in an HTML form.

This attribute is valid in HTML5.

• <input type="color">
• <input type="email">
• <input type="password">
• <input type="search">
• <input type="tel">
• <input type="text">
• <input type="url">

The pattern attribute contains a regular expression that the data must match to be submitted. The regular expression is based on JavaScript regular expressions.

Here is an example of an INPUT telephone field with a pattern looking for a phone number like this: “(###) ###-####.”

<input type="tel" id="phone" pattern="([0-9]{3}) [0-9]{3}-[0-9]{4}>

The pattern attribute default value is empty, so that no pattern is required to submit the data.

• HTMl5
• XHTML5

HTML5

<doctype html>