Web
Everything around building a website – the HTML reference (elements and attributes with examples and previews), the Web accessibility series (WCAG 2.2 and EU law, page structure, alternative text, forms, keyboard and focus, ARIA and testing), Web performance (measuring and Core Web Vitals, images, browser cache, loading CSS, JavaScript and fonts, compression and speed on the server), .htaccess and Apache (how .htaccess works, redirects, mod_rewrite and clean URLs, protecting folders and files, error pages and debugging) and Technical SEO (crawling and indexing, robots.txt and noindex, canonical URLs, sitemaps and hreflang, structured data and link previews). Shorter practical tips from earlier years: HTML, Website icon, Loading icon and Other web topics.
HTML
- What is the difference between readonly and disabled
- How slashes and dots work in a URL
- How to make a non-breaking hyphen
- How to find the ASCII value of a character
- HTML entities table
HTML reference – elements and attributes
- a – link
- abbr – abbreviation
- accesskey – keyboard shortcut (attribute)
- address – contact information
- area – image map area
Web accessibility
- Web accessibility: WCAG 2.2 and the law
- Page structure: language, headings and landmarks
- Alternative text, icons and media
- Accessible forms
- Keyboard and focus
Web performance
- How to measure website speed: Core Web Vitals
- Images: formats, sizes and lazy loading
- Browser cache: Cache-Control, ETag and file versions
- Loading CSS, JavaScript and fonts
- Compression and data transfer: gzip, Brotli and HTTP/2
.htaccess and Apache
- How .htaccess works
- Redirects in .htaccess: 301, 302 and one address for the site
- mod_rewrite and clean URLs
- Protecting folders and files: deny, IP address and password
- Error pages, file types and encoding
Technical SEO
- How search engines crawl and index a website
- robots.txt, noindex and X-Robots-Tag
- Canonical URLs and duplicate content
- Sitemaps and multilingual sites (hreflang)
- Structured data and link previews
Website icon
Loading icon
Other web topics
- Alt codes for special characters
- How to add a CAPTCHA to a website
- Error pages on a website
- Basic SEO for a website
- How to test and develop a live website