HTML | <input> pattern Attribute

Last Updated : 12 Aug, 2022

The HTML <input> pattern attribute is used to specify the regular expression on which the input elements value is checked against. This attribute works with the following input types: text, password, date, search, email, etc. Use the Global title attribute to describe the pattern for helping the user.

Syntax:

<input pattern = "regular_exp">

Example: This example illustrates the use of pattern attribute in <input> element.

html

<!DOCTYPE html> 
<html> 
    <head> 
        <title>
            HTML input pattern attribute
        </title> 
         
        <style> 
            body { 
                text-align:center; 
            } 
            h1 { 
                color:green; 
            } 
        </style> 
    </head> 
     
    <body> 
        <h1>GeeksforGeeks</h1> 
         
        <h2>HTML &lt;input&gt;pattern attribute</h2> 
         
        <form action="#"> 
            Password: <input type="text" name="Password"
             
            pattern="[A-Za-z]{3}" title="Three letter Password"> 
             
            <input type="submit"> 
        </form> 
    </body> 
</html>