Web Development Q&A Expert Needed

I have a list of technical questions that sit squarely in the software-development space, all centred on web technologies—HTML, CSS and JavaScript. What I need is clear, accurate, well-structured answers that go beyond surface-level explanations. Think concise theory where it matters, practical code snippets where they help, and references to current best practices so the solutions remain relevant.

You will receive the full set of questions the moment we kick off. Please return your responses in an organised format (numbered to match each prompt) and, when code is involved, include brief inline comments so the reasoning is obvious. I am happy with Markdown or a cleanly formatted document; whichever you find most readable.

Quality, clarity and correctness are the only success metrics here—if an answer can’t be copy-pasted into a project or used to guide the next step, it’s not finished. Let me know your availability and any follow-up information you’ll require so we can get started right away.