The HTML DOM Input Email required property determines whether Input Email is compulsory to set or not.
Syntax
Following is the syntax −
- Returning boolean value - true/false
inputEmailObject.required
- Setting required to booleanValue
inputEmailObject.required = booleanValue
Boolean values
Here, “booleanValue” can be the following −
booleanValue | Details |
---|---|
true | It is compulsory to set the email field to submit form. |
false | It is the default value and to set an email field is not compulsory. |
Example
Let us see an example of Input Email required property −
<!DOCTYPE html> <html> <head> <title>Input Email required</title> <style> form { width:70%; margin: 0 auto; text-align: center; } * { padding: 2px; margin:5px; } input[type="button"] { border-radius: 10px; } </style> </head> <body> <form> <h1>Compose Mail</h1> <fieldset> <legend>Email-required</legend> <label for="EmailSelect">Email Id : <input type="email" id="EmailSelect" required> </label><br> <label for="textarea">Message : <textarea id="textarea" rows="2" cols="20" name="message" placeholder="Type message..."></textarea></label><br> <input type="button" onclick="showMessage()" value="Send Mail"> <div id="divDisplay"></div> </fieldset> </form> <script> var divDisplay = document.getElementById("divDisplay"); var inputEmail = document.getElementById("EmailSelect"); function showMessage() { if(inputEmail.required === true && inputEmail.value === '') divDisplay.textContent = 'Cannot Send Mail: Email Id Required'; else divDisplay.textContent = 'Mail Sent'; } </script> </body> </html>
Output
This will produce the following output −
Clicking ‘Send Mail’ button −
After clicking ‘Send Mail’ button with value of an email field set −