HTML lessons: learn from scratch

There are two parts: question-and-answer pages and a sequence of lesson chapters. All of it is written by Nibras Code and available in 5 languages.

Questions and answers

How do I write my first HTML page?The page skeleton, saving the file and opening it in a browser.
The most used HTML tags: a short listHeadings, paragraphs, lists, links, images and div/span.
Links and images in HTML: href, src and altWhy a link or image does not work, and why alt text matters.
HTML forms: input, label and buttonBuilding a simple form and choosing field types.
Semantic HTML: what header, nav, main and footer are forDividing a page into meaningful parts, accessibility and SEO.
My HTML does not work: the 8 most common mistakesUnclosed tags, wrong file names, encoding and more.

Basic HTML syntaxElements, tags, attributes, void elements, doctype and correct nesting.
Headings and paragraphsThe h1–h6 hierarchy and the p element.
ListsUnordered, ordered and description lists.
Emphasis and importanceThe difference between em, strong, i and b.
Creating hyperlinksThe a element, relative and absolute URLs, email links.
Images in HTMLimg, alt text, sizing, figure and figcaption.
HTML table basicstable, tr, td, th, colspan and rowspan.
HTML formsform, input, label, button and field types.
Document and website structureheader, nav, main, article, section, aside, footer.
Webpage metadata: head and metatitle, meta charset, viewport, description, favicon.
Debugging HTMLThe validator, unclosed tags and wrong nesting.