JavaScript Masterclass - Zero to Job-Ready with Hands-On Projects - Basic Form Validation / 062

This lecture covers manipulating paragraph fields based on user input, setting success and error classes, and displaying feedback using CSS. It also explores advanced conditional logic for detailed feedback and real-time input validation using keyboard events.

What determines whether the paragraph class is set to 'success' or 'error'?

• The user's age

• The time of submission

• The result of the input validation

• The length of the feedback

Why is it important to use proper naming conventions for elements?

• To avoid confusion when the project grows

• To increase the speed of the website

• To make the code look more professional

• To reduce the file size

What JavaScript method is used to change the class of an element?

• querySelector

• addEventListener

• setAttribute

• getElementById

What feedback is displayed when the input is successful?

• Please try again

• Error in submission

• Feedback not submitted

• OK, feedback submitted. Thank you

What additional logic can be used to handle different input validation scenarios?

• Using 'try-catch' blocks

• Using 'for' loops

• Using 'else if' or 'switch' statements

• Using 'while' loops

How can real-time input validation be visually indicated to the user?

• By changing the background color

• By displaying an alert message

• By changing the border color

• By hiding the input field

What event can be used to track user input for real-time validation?

• submit

• keydown

• mouseover

• click