- 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
Quiz Question 1 of 6
When using the setCustomValidity() method in JavaScript, what is a critical consideration to ensure effective form validation?
Choose the correct answer below:
-
A
The custom message must match the browser's default error message format.
-
B
The custom error message must be concise and specific to the validation error being addressed to avoid confusion for the user.
-
C
The method should be called only after the form is submitted to avoid premature validation.
-
D
The custom validation logic should only apply to non-required fields.