Ivaylo Petrov

[Anatoli Kopadze @AnatoliKopadze]

the engineer who built Claude Code just dropped a 28-minute video on how to write prompts that actually work

I've seen $300 courses that don't cover what he shows in the first 10 minutes

CLAUDE.md files, memory shortcuts, parallel sessions, prompting patterns

all in one video and completely free

works whether you're a developer, a beginner, or someone who's been using Claude for months

based on this, I put together 18 things you can copy and use in Claude today

full guide in the article below

[Ivaylo Petrov @IvayloPetrovFE]

@estebansaiz What is it?

[Esteban Saiz @estebansaiz]

High Performance Git, a free book to domain Git by Ted Nyman

https://t.co/UqoaSjCrgK

[David Mráz @davidm_ml]

Sidebar for AI application built with React and TypeScript 🚀

Code in the comments and within Atheros Pass 🧑‍💻

[Soren @sorenblank]

another good example of `tabular-nums` in action. must have for columns of right-aligned numbers (tables, invoices, dashboards).

normal table's columns have ragged left edges as digits swap between narrow ("1") and wide ("0", "8") glyphs.

where tabular stays perfectly flush ~

[SumitM @SumitM_X]

As a Frontend Developer,

Please slap yourself if you cannot clearly explain at least 10 of the following :

Hydration
Partial hydration
Islands architecture
Streaming SSR
Concurrent rendering
Time slicing
Reconciliation algorithm
Fiber architecture
Virtual DOM diffing complexity
Structural sharing
Immutable data patterns
Referential equality
Memoization pitfalls
Stale closure problem
Event loop (macro vs microtasks)
Task starvation
Layout thrashing
Critical rendering path
Render blocking resources
Tree shaking internals
Code splitting strategies
Dynamic import chunking
Module federation
Shadow DOM
Custom Elements lifecycle
Web Components interoperability
Web Workers vs Service Workers
SharedArrayBuffer
Transferable objects
OffscreenCanvas
WebAssembly integration
Browser compositing layers
Paint vs composite vs layout
GPU acceleration in CSS
CSS containment
Subpixel rendering
IntersectionObserver internals
ResizeObserver loop limits
MutationObserver cost
IndexedDB
Service Worker lifecycle traps
Cache invalidation strategies
Stale-while-revalidate
ETag vs Cache-Control
HTTP/3 and QUIC
Priority hints
Preload vs Prefetch vs Preconnect
CORS preflight
SameSite cookie modes
CSRF vs XSS mitigation
Content Security Policy (CSP)
Trusted Types
DOM clobbering
Prototype pollution
Race conditions in UI state
Tearing in concurrent UI
Scheduler priorities
Render waterfalls
Suspense boundaries
Selective hydration
Server components
Edge rendering
Micro-frontend orchestration
Finite state modeling
Event sourcing in frontend
Optimistic UI rollback strategy
Offline conflict resolution
CRDT basics for collaboration
WebRTC
Backpressure in streams API
AbortController
Streaming fetch response handling
Browser memory leak detection
Detached DOM nodes
Garbage collection timing
PerformanceObserver API
Long tasks API
First Input Delay (FID)
Interaction to Next Paint (INP)
Cumulative Layout Shift (CLS)
Largest Contentful Paint (LCP)
Speculative prerendering
Priority inversion in async code
Deterministic rendering
Idempotent UI actions
Accessibility tree
ARIA live regions internals
Pointer events

[Clara Bennett @CodeswithClara]

BREAKING: AI can now design like Apple-level creative directors (for free).

Here are 10 Claude Opus 4.6 prompts that build complete design systems, brand guidelines & 47+ marketing assets in 6 hours:

(Designers are already snapping this)

[Esteban Saiz @estebansaiz]

Hack to the Future - Frontend

https://t.co/NL9mHh7J6N

[George Moller @_georgemoller]

❌ Avoid prop-drilling your components to extend them

✅ Instead use composition

[George Moller @_georgemoller]

⚛️ How to structure a React project that scales:

app/ → pages/ → features/ → shared/

[George Moller @_georgemoller]

❌ Rendering 10,000 items at once

✅ Rendering only what's visible

[George Moller @_georgemoller]

❌ Avoid multiple state variables to track status.

✅ Instead use enums.

[Haz @diegohaz]

A very simple button.
Coming soon.

[George Moller @_georgemoller]

❌ Adding state to useCallback dependencies.

✅ Instead, use functional setState.

Stable callbacks, no stale closures, no unnecessary re-renders.

Here's the pattern ↓

[UI/UX Savior @UiSavior]

Stop guessing sidebar spacing.

Here are the numbers that actually feel premium.

[Anton Martyniuk @AntonMartyniuk]

Junior developer needs to know 4 patterns

Middle dev needs to know 12 patterns

Senior developer needs to know 20 patterns

Design patterns help you solve common problems and improve code quality if used properly.

Ever wondered which design patterns you should focus on as you grow as a developer?

This could be the difference between writing good code... and building great software.

👉 𝗝𝘂𝗻𝗶𝗼𝗿 𝗗𝗲𝘃𝗲𝗹𝗼𝗽𝗲𝗿:

You don’t need to know everything at once.
Focus on the essentials — the patterns that show up everywhere.

1️⃣ Builder
2️⃣ Factory Method
3️⃣ Singleton
4️⃣ Decorator

These four patterns help you create, organize, and extend objects efficiently.

Master these, and you’ll write cleaner, more flexible code from day one.

👉 𝗠𝗶𝗱𝗱𝗹𝗲 𝗗𝗲𝘃𝗲𝗹𝗼𝗽𝗲𝗿:

Ready to step up?

Now it’s time to add more versatile tools to your toolbox.

1️⃣ Strategy
2️⃣ Adapter
3️⃣ Abstract Factory
4️⃣ Template Method
5️⃣ Facade
6️⃣ Bridge
7️⃣ Command
8️⃣ Mediator

These patterns teach you how to swap behaviors, simplify complex systems, and make your code more modular.

👉 𝗦𝗲𝗻𝗶𝗼𝗿 𝗗𝗲𝘃𝗲𝗹𝗼𝗽𝗲𝗿:

You've mastered the basics.

Now it's time to tackle patterns that solve the toughest architectural challenges.

1️⃣ Prototype
2️⃣ Composite
3️⃣ Chain of Responsibility
4️⃣ State
5️⃣ Flyweight
6️⃣ Proxy
7️⃣ Visitor
8️⃣ Interpreter

These patterns give you superpowers for working with complex structures, dynamic behaviors, and resource optimization.

You'll notice: as you start solving bigger problems, these patterns show up again and again.

📌 Important note:
Don't try to learn everything all at once!
Follow a progression — master the basics, then level up with more advanced patterns as you grow.

Which design pattern was the hardest for you to learn, and how did you finally "get it"?

——

📌 Save this post for future reference!

♻️ Repost to help others learn design patterns that matter

➕ Follow me ( @AntonMartyniuk ) to improve your .NET and Architecture Skills

[Machina @EXM7777]

he did it again

[George Moller @_georgemoller]

❌ Don't disable ESLint warnings in useEffect

✅ Instead use useEffectEvent from React 19.2