Learn how to retrieve and format current dates in JavaScript using built-in methods, Intl.DateTimeFormat, and custom formatting techniques. Complete guide with examples and best practices.
Learn how to request camera and microphone access in Telegram Mini Apps just once. Caching media streams and saving permission states to improve UX.
Learn how Access-Control-Allow-Origin header enables cross-origin requests in CORS. Discover proper implementation steps, preflight requests, and security best practices for enabling JavaScript from one domain to access resources on another.