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HTML

Browse articles, tutorials and projects about HTML. Choose a topic from the list to read the explanations and code examples.

CSS Grid vs Flexbox: understanding the differences

CSS Grid vs Flexbox: understanding the differencesComparison · 4 min

Regex to validate a strong password in JavaScript and PHP

Regex to validate a strong password in JavaScript and PHPExplainer · 2 min

Regex to validate a date: JavaScript, PHP and HTML

Date regex: validate DD/MM/YYYY or YYYY-MM-DD (JavaScript, PHP, HTML)Explainer · 6 min · verified on 7 September 2026

Postcode regex to validate a French postcode in JS, PHP, HTML

Postcode regex to validate a French postcode in JS, PHP, HTMLExplainer · 3 min

Regex to validate an IP address: IPv4 and IPv6 patterns

Regex to validate an IP address: IPv4 and IPv6 patternsExplainer · 4 min

Build a tab system in JavaScript and CSS, with ARIA attributes

Build a tab system in JavaScript and CSS, with ARIA attributesExplainer · 4 min

Lazy loading images: 5 methods to speed up your website

Lazy loading images: 5 methods to speed up your websiteExplainer · 8 min

CSS progress bar: how to build one with HTML and CSS

CSS progress bar: how to build one with HTML and CSSTutorial · 2 min

HTML forms: 4 best practices for fieldsets, labels and select

HTML forms: 4 best practices for fieldsets, labels and selectExplainer · 4 min

5 common HTML mistakes to avoid, and what to write instead

Semantic HTML: 10 common mistakes and the tags that fix themExplainer · 8 min · verified on 7 September 2026

SVG with media queries: responsive SVG styled in CSS

SVG with media queries: responsive SVG styled in CSSExplainer · 21 min

Check if an input is empty using only CSS and HTML

Check if an input is empty using only CSS and HTMLTutorial · 2 min