--- title: Best Frontend Masters posts — May 2026 | daily.dev description: The most upvoted Frontend Masters posts from May 2026, curated by the daily.dev community. canonical: https://daily.dev/sources/frontendmasters/best-of/2026/05 twitter:card: summary_large_image twitter:site: @dailydotdev og:url: https://daily.dev/sources/frontendmasters/best-of/2026/05 og:type: website og:site_name: daily.dev og:title: Best Frontend Masters posts — May 2026 | daily.dev og:description: The most upvoted Frontend Masters posts from May 2026, curated by the daily.dev community. og:image: https://media.daily.dev/image/upload/s--VAY5ToZt--/f_auto/v1724209435/public/daily.dev%20-%20open%20graph --- # Best of Frontend Masters — May 2026 1. 1 [](https://daily.dev/posts/border-shape-frontend-masters-blog-3mflalhg6 "border-shape – Frontend Masters Blog") Article Frontend Masters · 16w border-shape – Frontend Masters Blog The upcoming CSS \`border-shape\` property lets developers define custom shapes for element borders without losing border or box-shadow styling — a limitation of the current \`clip-path\` workaround. Combined with the \`shape()\` function, it enables non-standard shapes like speech bubbles or hearts. One caveat: text flow does not automatically adapt to the new shape, though a workaround using \`shape-outside\` with split left/right halves can reflow text correctly. 63 3 2. 2 [](https://daily.dev/posts/your-node-js-streams-aren-t-backpressuring-they-re-silently-eating-your-memory-frontend-masters--fmwfitdyu "Your Node.js Streams Aren’t Backpressuring. They’re Silently Eating Your Memory. – Frontend Masters Blog") Article Frontend Masters · 16w Your Node.js Streams Aren’t Backpressuring. They’re Silently Eating Your Memory. – Frontend Masters Blog Node.js streams don't automatically prevent memory exhaustion — backpressure is a cooperative protocol that producers must actively respect. The core issue: \`.write()\` returns \`false\` when the internal buffer exceeds \`highWaterMark\`, but nothing forces you to honor that signal. Ignoring it causes unbounded heap growth that only manifests under large datasets. Key pitfalls covered include: the \`highWaterMark\` advisory threshold (bumped 4x in Node.js 22), \`objectMode\` counting objects not bytes, Transform streams with independent readable/writable buffers, \`.pipe()\` silently swallowing errors and leaking file descriptors, and \`async/await\` pacing reads but not writes. The fix for write loops is checking the \`.write()\` return value and awaiting the \`drain\` event. \`pipeline()\` from \`node:stream/promises\` replaces \`.pipe()\` with proper error propagation. Finally, correctly implementing backpressure can expose a secondary problem: database connection pool starvation when slow clients hold cursors open, requiring query timeouts, dedicated worker pools, or queue-based offloading for large exports. 22 1 3. 3 [](https://daily.dev/posts/how-to-control-infinite-css-animations-part-1-of-2-frontend-masters-blog-1il6rgdb9 "How to Control Infinite CSS Animations (Part 1 of 2) – Frontend Masters Blog") Article Frontend Masters · 18w How to Control Infinite CSS Animations (Part 1 of 2) – Frontend Masters Blog A deep dive into controlling infinite CSS animations beyond simple pause/play. Using animation-composition: add with a duplicated paused animation, you can accelerate, decelerate, stop, or reverse an already-running infinite animation without causing jumps or glitches. The technique uses CSS custom properties for a speed factor variable, and CSS math functions like abs() and sign() to create a single generic solution that handles all speed and direction cases. Practical examples include rotating elements, marquee animations, glowing borders, and interactive galleries. 16 1 4. 4 [](https://daily.dev/posts/css-n-of-selectors-for-conditional-validation-frontend-masters-blog-wsa8a9f2p "CSS `n of` Selectors for Conditional Validation – Frontend Masters Blog") Article Frontend Masters · 19w CSS \`n of\` Selectors for Conditional Validation – Frontend Masters Blog CSS's \`:nth-child(n of )\` syntax can be used for client-side conditional form validation without JavaScript. By combining \`n of\` selectors with \`:has()\`, \`:placeholder-shown\`, \`:checked\`, and other pseudo-classes, you can detect when a specific number of form fields have been filled in and provide real-time visual feedback to users. The post walks through a practical example where a form signals completion once at least three of five varied field types (email, URL, text, radio, select) are filled out, demonstrating how to compose complex CSS selectors for this purpose. A potential WebKit bug with state-based \`n of\` styling is also noted. 16 1 [See all Frontend Masters archives](/sources/frontendmasters/best-of) ```json {"@context":"https://schema.org","@graph":[{"@type":"Organization","@id":"https://daily.dev/#organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180},"sameAs":["https://twitter.com/dailydotdev","https://github.com/dailydotdev","https://www.linkedin.com/company/daily-dev-ltd"]},{"@type":"WebSite","@id":"https://daily.dev/#website","url":"https://daily.dev","name":"daily.dev","publisher":{"@id":"https://daily.dev/#organization"},"potentialAction":{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https://daily.dev/search?q={search_term_string}"},"query-input":"required name=search_term_string"}}]} {"@context":"https://schema.org","@graph":[{"@type":"CollectionPage","@id":"https://daily.dev/sources/frontendmasters/best-of/2026/05#page","url":"https://daily.dev/sources/frontendmasters/best-of/2026/05","name":"Best Frontend Masters Posts — May 2026","description":"The most upvoted Frontend Masters posts from May 2026, curated by the daily.dev community.","isPartOf":{"@type":"WebSite","url":"https://daily.dev"}},{"@type":"ItemList","@id":"https://daily.dev/sources/frontendmasters/best-of/2026/05#items","numberOfItems":4,"itemListElement":[{"@type":"ListItem","position":1,"url":"https://daily.dev/posts/border-shape-frontend-masters-blog-3mflalhg6","name":"border-shape – Frontend Masters Blog"},{"@type":"ListItem","position":2,"url":"https://daily.dev/posts/your-node-js-streams-aren-t-backpressuring-they-re-silently-eating-your-memory-frontend-masters--fmwfitdyu","name":"Your Node.js Streams Aren’t Backpressuring. 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