It is a Boolean attribute which is used to specify that the input element must be filled out before submitting the Form.
Elements: This attributes can be associated with three elements which are listed below:
Syntax:
<input required>
Example-1:
html
<!DOCTYPE html>
<html>
<head>
<title>required Attribute</title>
<style>
h1, h2 {
color:green;
font-style:italic;
}
body {
text-align:center;
}
</style>
</head>
<body>
<h1>GeeksForGeeks</h1>
<h2>required attribute in input Field</h2>
<form action="">
Username:
<input type="text"
name="username"
required>
<br>
Password:
<input type="password"
name="password">
<br>
<input type="submit">
</form>
</body>
</html>
|
Output:
Syntax:
<select required>
Example-2:
html
<!DOCTYPE html>
<html>
<head>
<title>required Attribute</title>
<style>
h1, h2 {
color:green;
font-style:italic;
}
body {
text-align:center;
}
</style>
</head>
<body>
<h1>GeeksForGeeks</h1>
<h2>required attribute in select Field</h2>
<form action="">
<select required>
<option value="">
None
</option>
<option value="ds">
Data Structure
</option>
<option value="algo">
Algorithm
</option>
<option value="os">
Operating System
</option>
<option value="cn">
Computer Network
</option>
</select>
<input type="submit">
</form>
</body>
</html>
|
Output:
Syntax:
<textarea required>
Example-3:
html
<!DOCTYPE html>
<html>
<head>
<title>required Attribute</title>
<style>
h1, h2 {
color:green;
font-style:italic;
}
body {
text-align:center;
}
</style>
</head>
<body>
<h1>GeeksForGeeks</h1>
<h2>required attribute in Textarea Field</h2>
<form action="">
<textarea rows="7"
cols="50"
name="comment"
required>
</textarea>
<input type="submit">
</form>
</body>
</html>
|
Output:
Supported Browsers: The browser supported by required attribute are listed below:
- Google Chrome
- Firefox
- Opera