DEV Community • 2026-04-16 09:24

We Built a Free Website Health Scanner. Here's What It Finds on Most Sites

Your site is up. But is it healthy? We just shipped a free website health scanner at getsitewatch.com/scan. No signup. No email. Just paste a URL and get a full report in about 20 seconds. We built it because we kept running into the same problem: developers and site owners had no quick way to check if their site was actually working — beyond just loading the page in a browser and eyeballing i...

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DEV Community • 2026-04-16 09:23

Revalidating cache in NextJs: intro

We've covered 2 caches: data cache and full route cache. In most cases, these need to be updated periodically or at specific intervals. That is what revalidation does: it let's you update the fetch results - data cache - or the statically prerendered routes - full route cache. Note that there are 4 combinations here: data cache no data cache Dynamic render data revalidation no revalidatio...

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Data cache in NextJs
DEV Community • 2026-04-16 09:22

Data cache in NextJs

Until now, we've only worked with "hard coded" components, no external APIs. Why? Because of Next data cache. Data cache allows the result of external requests (using fetch) to be stored on the server. It also handles revalidation of this data. Data cache means that instead of making a request twice, the second request would just return the cached result of the first one. Of course, you can alway...

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Static and dynamic rendering of client components
DEV Community • 2026-04-16 09:22

Static and dynamic rendering of client components

In the previous chapter, we looked into static and dynamic rendering. Rendering happens at route level and means that we run the functional components and use their return values. Each route gets rendered into a bunch of files (js, css, icons, images, fonts,...) but we're interested in these 2: HTML file: <div>Hello world</div>, served at initial load. rsc payload file: { "div", ch...

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Static and dynamic rendering and Full Route Cache
DEV Community • 2026-04-16 09:21

Static and dynamic rendering and Full Route Cache

Static rendering means that routes are prerendered at build time. The result is cached and can be reused across requests. Static routes are fully cached in the Full Route Cache. Dynamic rendering means that routes are rendered server-side at request time. The result is served to users but not cached. These are the definition, the theory. In this chapter I will try to explain these concepts in...

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Hacker News • 2026-04-16 09:20

Show HN: Open Finance Insurance sandbox (OAuth2, quotes → policies)

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Hacker News • 2026-04-16 09:18

Show HN: Stop Using LangChain

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Newest questions tagged reactjs - Stack Overflow • 2026-04-16 09:13

How do I deal with a bookinglist in a vehicle management system

How do I write a code in reactjs for a booking list to enable an admin be able to get all bookings made by customers and be able to accept and reject the bookings while the customer on the other hand can see the bookings they made with status either accepted rejected or pending

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Echo JS • 2026-04-16 09:13

SalesTrainingLondn

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DEV Community • 2026-04-16 09:08

Delete Files in PowerShell: Remove-Item with Safety

Delete Files in PowerShell: Remove-Item with Safety Deleting is permanent. Learn the safe patterns that prevent accidental data loss. How It Works Remove-Item (del/rm) deletes files. Unlike Windows trash bin, PowerShell deletes files permanently—they don't go to recycle bin. So you must be careful. Always preview what you're deleting before actually running Remove-Item. ...

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2m read
DEV Community • 2026-04-16 09:07

K3s, MetalLB & Cilium

This post covers how I set up the on-premise Kubernetes cluster — picking a distribution, getting k3s running on CentOS, solving load balancing with MetalLB, and eventually replacing both MetalLB and the default CNI with Cilium. Picking a Distribution There are several lightweight Kubernetes distributions for on-prem setups like RKE, k0s, MicroK8s, and k3s. For a small cluster, I care ...

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5m read
DEV Community • 2026-04-16 09:07

We Ran 18,000 Test Calls Across 297 Agent Data Capabilities. 49% Failed.

If you're building AI agents that call external data sources, you probably assume the API will return what it promises. We tested that assumption. Over 6 days (April 9–14, 2026), we ran 18,449 automated test calls across all 297 capabilities on Strale — our platform for verified agent data. Company registries, compliance checks, financial validation, web scraping, document extraction, developer ...

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DEV Community • 2026-04-16 09:06

Power SEO Meta vs Next SEO: Which SEO Library is Better for Modern Next.js App Router?

Three weeks after deploying a 60-page product catalog, a client's marketing team messaged me: "Why are our product images not showing when we share links on LinkedIn?" I opened Google Search Console. Twenty-three out of sixty product pages had max-image-preview missing from their robots directives. Six draft pages were indexed when they should have been noindex. Zero build errors. Zero runtime wa...

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DEV Community • 2026-04-16 09:05

Vibe Coding Security: What Happens When Developers Trust AI Too Much

Nearly half of all AI-generated code contains security vulnerabilities. Not edge cases. Not theoretical risks. According to Veracode's 2025 GenAI Code Security Report, which tested over 100 large language models across 80 real-world coding tasks, 45% of AI-generated code introduced OWASP Top 10 vulnerabilities. With 41% of global code now AI-generated and 87% of Fortune 500 companies using at lea...

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DEV Community • 2026-04-16 09:04

Time-to-First-Success Is Your Real Acquisition Funnel

A lot of devtool companies think they have an acquisition problem when they really have an activation problem. They fight for the click, celebrate the signup, and then quietly lose the user in the first 15 minutes. That is the trap. The market calls it “top of funnel,” but the builder’s version is simpler: if the developer does not reach a real first win fast enough, you did not really acquire...

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DEV Community • 2026-04-16 09:04

I compared 3,000+ cloud VMs so you don't have to — here's what actually surprised me

The "which cloud is cheapest" question is the wrong question I've been building whichvm.com on the side — it pulls live pricing from AWS, Azure, and GCP APIs into a single table. After months of staring at this data while picking instances for actual work, here's what I keep coming back to. No vendor fluff, just numbers. Everyone asks which cloud is cheapest. The real answer is it depends on the...

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DEV Community • 2026-04-16 09:02

A GitHub agentic workflow

Last month, I became aware of GitHub agentic workflows. I read the site carefully, but the use cases weren't very exciting to me. I tried the continuous documentation It didn't work out initially, and because of my lack of involvement, I left it as it was. However, I succeeded in another one that I want to describe in this post. Note: With lessons learned here, I managed to make the documentatio...

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HackerNoon • 2026-04-16 09:01

A CDO’s Adventure in Generative AI

A Chief Data Officer learns that general-purpose AI like ChatGPT and Gemini can create impressive outputs but fail in production due to non-determinism and missing infrastructure context. The solution: shift to domain-specific generative AI, which delivers more reliable, consistent results tailored to real enterprise data environments.

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The Real Lesson from OpenAI’s Top Customers: Tokens Aren’t Spend. They’re Leverage
HackerNoon • 2026-04-16 09:00

The Real Lesson from OpenAI’s Top Customers: Tokens Aren’t Spend. They’re Leverage

OpenAI’s top token-consuming organizations reveal a shift: AI is now embedded in core workflows, letting startups rival enterprises in cognitive capacity. Tokens per employee, not total volume, show leverage. PlayerZero helps teams safely scale AI, enabling faster resolution, higher reliability, and proactive workflow automation without increasing headcount.

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DEV Community • 2026-04-16 09:00

SSE and PHP-FPM don't play well together

I was building a chatbox on my dedicated server — a shared space where members could exchange data and communicate in real time. On the server side, I went with Server-Sent Events. Clean, simple, native HTTP. In local development, everything worked perfectly. I pushed to production. For two days, not a single issue. Then one evening, about ten people were using the chat at the same time. The site...

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