A reading time calculator for blog posts uses one formula: word count divided by reading speed — 200-265 WPM depending on your source.
JavaScript
Explore JavaScript tutorials, examples, concepts, and practical techniques for creating interactive and dynamic websites and web applications.
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A dark mode toggle using JavaScript needs to check localStorage, then OS preference, then default — and apply it before the page even renders.
Build an AI image generator using an API — real Express code, three response formats handled correctly, and a security-first approach to your API key.
Automatically generate table of contents from headings using vanilla JS — no library needed. Slugified IDs, nesting, and active-section highlighting.
A sticky table of contents using CSS & JavaScript combines position: sticky with IntersectionObserver — plus a look at the emerging CSS-only method.
A copy to clipboard button using JavaScript needs more than writeText() — secure context, real user gestures, and honest fallback handling.
Detect broken links using JavaScript with working HEAD-request code console snippet, full scanner with retry logic, and a Node.js sitemap checker.
Build an SEO audit tool using JavaScript with five real DOM-based checks and a weighted scoring system — turn it into a one-click bookmarklet.
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