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- Client-side form validation
- Using Built-in Form Validation
- The Required Attribute
- Validating Against a Regular Expression
- Constraining the Length of Your Entries
- Full Example
- The Constraint Validation API
- Implementing a Customized Error Message
- A More Detailed Example
- Validating Forms Without a Built-in API
- Form Validation Quiz 6 questions
Well done!
You have completed (UPI) Chapter 10: Utilizing Forms with JavaScript!
Instruction
Full Example
Here is a full example to show usage of HTML's built-in validation features. First, some HTML:
<form>
<fieldset>
<legend>
Do you have a driver's license?
<span aria-label="required">*</span>
</legend>
<input type="radio" required name="driver" id="r1" value="yes" />
<label for="r1">Yes</label>
<input type=...