HTML required Attribute: This attribute is defined as a boolean attribute. It specifies that the element must be filled out before submitting the form.
Elements: This attributes can be associated with three elements which are listed below.
<input>: The required attributes can be used in <input> elements.
HTML required Attribute
This attribute can be applied on <input>,<select>,<textarea> elements.
Syntax: <element required>
Browser Support
This attribute is supported by the following browsers:
- Chrome
- Firefox
- Internet Explorer
- Safari-does not support
- Opera
Example: for <input> element
<!DOCTYPE html> <html> <body> <form action="/action_page.php"> Username: <input type="text" name="usrname" required> <input type="submit"> </form> </body> </html>
Output:
Example: for <select> element
<!DOCTYPE html> <html> <body> <form action="/action_page.php"> <select required> <option value="">None</option> <option value="volvo">HTML</option> <option value="saab">CSS</option> <option value="mercedes">C</option> <option value="audi">C++</option> </select> <input type="submit"> </form> </body> </html>
Output:
Example: for <textarea> element
<!DOCTYPE html> <html> <body> <form action="/action_page.php"> <textarea rows="4" cols="50" name="comment" required> </textarea> <input type="submit"> </form> </body> </html>
Output:
