"LangChain ReactAgent in browser: error and solution"

𝐍𝐞𝐱𝐭.𝐣𝐬 16 𝐑𝐞𝐥𝐞𝐚𝐬𝐞𝐝: 𝐅𝐨𝐜𝐮𝐬𝐞𝐝 𝐨𝐧 𝐒𝐩𝐞𝐞𝐝, 𝐂𝐨𝐧𝐭𝐫𝐨𝐥, 𝐚𝐧𝐝 𝐃𝐞𝐯𝐞𝐥𝐨𝐩𝐞𝐫 𝐄𝐟𝐟𝐢𝐜𝐢𝐞𝐧𝐜𝐲 After diving into Next.js 16, it’s clear this release focuses on giving developers deeper control over performance and smarter tooling for modern web apps. Here’s what stands out in this release: 1. Cache Components The new "use cache" directive gives developers control over what to cache — improving load times reducing server strain. 2. Turbopack (Stable) Now the default bundler, Turbopack delivers much faster builds and refresh times for new apps. 3. React Compiler Support With automatic memoization built-in, React now skips unnecessary re-renders. 4. Smarter Routing & Prefetching Page transitions feel smoother, and the logs now provide much clearer visibility. 5. AI-Assisted DevTools (MCP Integration) MCP brings AI-powered insights into DevTools, helping developers identify performance and caching issues in real time. In short, Next.js 16 sets a new benchmark for building high-performance, intelligent web applications.

React 19.2.0 — Released on October 1, 2025 Key Changes: 1. useEffectEvent – Introduces an official way to handle non-reactive callbacks inside useEffect. Prevents unnecessary re-runs and solves stale closure issues. 2. <Activity /> API – Lets you suspend effects and preserve component state when a UI section is hidden, improving performance for tabs, modals, and side panels. 3. cacheSignal – Adds a signal-based API to observe cache invalidation in server components, supporting smarter partial pre-rendering. 4. React Performance Tracks – Enhances DevTools with better profiling, effect visualization, and scheduling insights. Full changelog: https://lnkd.in/d5Uz5nMH

Next.js 16 is a total game-changer 🔥🔥 Where previous versions took around 6 seconds to compile, it now takes only 1.3 seconds. In terms of performance, it leaves every earlier version in the dust. Next.js 15 was stable and powerful, but Next.js 16 (Beta) brings a whole new level of speed and experience. The new updates make the entire development process smoother and more complete — • Turbopack is now enabled by default • Turbopack file system caching (beta) • Faster navigation and prefetching • Improved caching APIs • Build Adapters API (alpha) • Support for React 19.2 This version proves that the future of Next.js won’t be slow or resource-hungry anymore. What do you think?

🔄 𝗥𝘅𝗝𝗦 𝗘𝗿𝗿𝗼𝗿 𝗥𝗲𝗰𝗼𝘃𝗲𝗿𝘆 — 𝗥𝗲𝘁𝗿𝘆, 𝗕𝗮𝗰𝗸𝗼𝗳𝗳 & 𝗙𝗮𝗶𝗹𝗼𝘃𝗲𝗿 𝗟𝗶𝗸𝗲 𝗮 𝗣𝗿𝗼 When streams break, graceful recovery makes all the difference. This article shows how to build resilient RxJS flows with retries, backoff strategies, and failover logic. In this article you’ll explore: ✅ Using `retryWhen` along with backoff patterns to retry gracefully ✅ How to switch to a fallback observable when primary stream fails ✅ Real-world application: interfaces that stay responsive despite backend hiccups 👉 𝗗𝗶𝘃𝗲 𝗶𝗻𝘁𝗼 𝗶𝘁 𝗵𝗲𝗿𝗲: https://lnkd.in/d928sTyt Make your reactive code robust, fault-tolerant and production-ready. 🚀 #RxJS #Angular #WebDevelopment #ReactiveProgramming #JavaScript

Control is the name of the game in Next.js 16. This release gives developers explicit control over the core of their application, making maintenance and performance optimization much simpler: * Cache Components & use cache: No more implicit caching! Gain granular control over what gets cached, making complex parts of your app predictable and easier to debug. * Turbopack is the Default: The lightning-fast build system is now stable and the default, bringing huge performance and stability gains to your entire development and production workflow. * Refined Caching APIs: New functions like updateTag() and a more powerful revalidateTag() offer precise, granular control over data invalidation, giving you "read-your-writes" consistency. If you're building large, data-intensive applications, these features will be game-changers for your architecture. #NextJS16 #DeveloperExperience #Caching #Turbopack #React

As apps grow, so does the complexity of handling shared data, UI state, and side effects. Angular offers several approaches; from built-in reactive patterns to powerful libraries like NgRx and the emerging Signals API. In this post, I'll walk through how to manage state efficiently, combining the predictability of NgRx with the reactivity of Signals for more elegant, performant applications. https://lnkd.in/d_4WzP-Z

Error Logger & Viewer — tiny SPA for tracking JS errors TL;DR: Tiny SPA to capture and group browser JS errors — filters, charts, demo and server modes. Try the "Create test error" button on the demo: https://lnkd.in/gNGCFMj2 Why I built it What happens when a small idea turns into a few months of late‑night debugging? I wanted a lightweight tool that helps developers see runtime problems quickly, group similar errors, and track fix progress. The app runs in two modes: demo (localStorage) for quick tests and server (Node.js + Express + LowDB) for persistent storage. What it does Captures global JS errors (window.onerror, onunhandledrejection), resource load errors, and fetch failures. Groups and deduplicates errors by message/stack to reduce noise. Searchable, sortable error table with status tracking (new / in progress / fixed / ignored) and comments. Charts for error dynamics (day/week/month), visual filters and quick actions. Supports light/dark themes and i18n (EN/RU). Accessibility features: ARIA labels and keybo https://lnkd.in/gQhYFmgq

Error Logger & Viewer — tiny SPA for tracking JS errors TL;DR: Tiny SPA to capture and group browser JS errors — filters, charts, demo and server modes. Try the "Create test error" button on the demo: https://lnkd.in/gNGCFMj2 Why I built it What happens when a small idea turns into a few months of late‑night debugging? I wanted a lightweight tool that helps developers see runtime problems quickly, group similar errors, and track fix progress. The app runs in two modes: demo (localStorage) for quick tests and server (Node.js + Express + LowDB) for persistent storage. What it does Captures global JS errors (window.onerror, onunhandledrejection), resource load errors, and fetch failures. Groups and deduplicates errors by message/stack to reduce noise. Searchable, sortable error table with status tracking (new / in progress / fixed / ignored) and comments. Charts for error dynamics (day/week/month), visual filters and quick actions. Supports light/dark themes and i18n (EN/RU). Accessibility features: ARIA labels and keybo https://lnkd.in/gQhYFmgq

After using 𝐍𝐞𝐱𝐭.𝐣𝐬 𝟏𝟔, my first reaction was: “Wait… since when did it get this smooth?!” 😳 This version is a complete win for developers: - Build speed feels like turbo mode - Caching has become smarter and more efficient - Routing transitions are almost invisible - DevTools? It makes debugging faster and simpler than ever 𝐍𝐞𝐱𝐭.𝐣𝐬 𝟏𝟔 clearly shows that true evolution isn’t about adding features, it’s about elevating the entire developer experience. 👏

Vercel has released Next.js 16, a significant upgrade to its React framework for full-stack web application development. Key enhancements include Cache Components, a new set of features for more explicit and flexible caching through the 'use cache' directive. The update also brings AI-powered debugging with Next.js DevTools MCP, offering contextual insights and issue diagnosis. Turbopack is now the default bundler for new projects, promising faster builds and improved Fast Refresh, alongside stable support for the React compiler to automatically memoize components. These additions aim to streamline development workflows and boost application performance.