I want notes on jQuery, html and mysql to prepare for an interview in 2…

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You'll understand how jQuery's event delegation, .on()/.off(), and AJAX methods ($.ajax, .then(), $.Deferred) actually work under the hood. You'll be able to explain why delegated events survive DOM changes, how to chain async calls cleanly, and how to debug the classic "it works once then breaks" jQuery bugs interviewers love to probe.

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You'll walk into the interview able to explain how a browser turns raw HTML bytes into a rendered page, why semantic tags matter beyond "cleaner code," and how native form validation actually works under the hood. You'll also be able to write accessible, production-grade markup on a whiteboard without reaching for <div> as a default. That's the difference between "knows HTML" and "understands HTML."