HTML Form Validation

In HTML5, we have built in validation which was helpful for developers to ensure that a proper entry is entailed before a form is submitted.That means you get to ask for a field, define how the input is wanted (email address for instance), and give real-time feedback to the user without the need for JavaScript or extra plugins.

				
					<form action="/submit" method="post">
    <label for="name">Name:</label>
    <input type="text" id="name" name="name" required>
    <br><br>
    
    <label for="email">Email:</label>
    <input type="email" id="email" name="email" required>
    <br><br>
    
    <label for="age">Age (must be a number between 18 and 60):</label>
    <input type="number" id="age" name="age" min="18" max="60" required>
    <br><br>
    
    <label for="website">Website (URL must start with http:// or https://):</label>
    <input type="url" id="website" name="website" pattern="https?://.+" required>
    <br><br>
    
    <button type="submit">Submit</button>
</form>

Explanation of Example:

Required Fields: It makes sure the fields “Name” and “Email” are filled before submission using the required attribute.
Email Validation: type="email" is required to accept only a valid email (for instance, [email protected]).
Number Validation: Finally, the “Age” field uses type="number" and it only allows values between 18 to 60, thanks to the min and max attributes.
URL Pattern: type="url" on the “Website” field and pattern that checks the URL input with “http://” or “https://”. It makes sure the user submits a good website link.

How HTML5 Form Validation Works:

It’s much simpler with HTML 5, you simply add required, pattern, or even type attributes to any fields in a form, and the browser will take care of the validation for you.
The browser will display an error message and block the submission when users try to submit the form without meeting the required conditions.
Built-in form validation was added to HTML5, making it a lot easier for developers to ensure that users provide the correct information before submitting a form.
This means you can have real-time feedback to users without needing JavaScript or plugins.
You can require fields and specify input formats (like email addresses).
In HTML5, you can solve this by simply adding required, pattern, or type attributes to form fields and let the browser handle the validation.
If the user does not meet the requirements for submission, the browser will display an error message and prevent the form from being submitted.

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HTML Form Validation

Explanation of Example:

How HTML5 Form Validation Works:

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HTML Form Validation

Explanation of Example:

How HTML5 Form Validation Works:

Try It Yourself

Share with friends