Why validate forms?
Better data quality, user experience and guidance, reduced load
When to use event delegation?
Lists, forms, performance-critical apps, dynamically added elements
Input event
Validates on every keystroke. Immediate feedback
Change event
Validates when value is finalized. Useful for select dropdown
Regular expressions
Provides pattern matching for validating common input formats
Accessible form validation
Makes validation useable for everyone
Asynchronous code benefits
Improves performance, network requests don’t freeze the page, smooth user experience, allows multiple requests
JavaScript Object Notation (JSON)
A data format for exchanging info between clients and servers
Fetch App Programming Interface (API)
Provides an assured approach to making HTTP requests
Modern forms
Submit data asynchronously, providing immediate feedback
Managing loading states
Provides visual feedback during asynchronous operations
