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Web Security: OWASP Top 10 — Practical Defense Guide (2026)

Web Security: OWASP Top 10 — Practical Defense Guide (2026)Security vulnerabilities follow patterns. The OWASP Top 10 lists the most critical ones — and each has a clear defense strategy. #1 Broken Access Control// ❌ Vulnerable: Anyone can access any user's dataapp.get('/api/users/:id', (req, res) => { const user = await db.users.findById(req.params.id); res.json(user); // No ownership check!});// ✅ Secure: Enforce resource ownershipapp.get('/api/users/:id', authRequired, async (

Redefining Web Technology: The Architecture Behind 'Legend of Occult Puzzle' and 'Ninja Counter!' (06/12 15:39)

The 'Legend of Occult Puzzle' and its latest iteration, 'Ninja Counter!', stand as monumental achievements in the realm of web technology. These games redefine the possibilities of JavaScript, Canvas, HTML, and CSS, pushing the boundaries of what browser-based games can achieve.The architecture of these games is a testament to the innovative use of pure JavaScript and Canvas, synchronized to perfection with HTML elements. The isometric quarter-view, meticulously crafted down to the pixel, offers

Why modal.open() should return Promise<TResult>, not Promise<any>

How treating modals as typed async operations eliminates boolean state, callback chains, and runtime surprises in React apps.React applications often treat modals as UI details.A boolean flag. A conditional render. An onClose callback.That works fine for one dialog.But real products have modals that are actually business flows:confirm this destructive actionrename this entity and return the new namepick a date range and apply itresolve a conflict before continuingcomplete a wizard step before th

CRISPR tech selectively shreds cancer cells, including "undruggable" cancers

<a href="https://news.ycombinator.com/item?id=48505231">Comments</a>

Your package.json diffs are noisy for no reason. I built a zero-dep fixer.

Open a PR, and half the package.json diff is keys that didn't actuallychange — they just moved. One teammate's editor writes name at the top,npm install shoves a field somewhere else, a codegen tool emits keys inwhatever order its hashmap felt like. None of it is a real change, but it allshows up in review, buries the one line that matters, and turns trivial mergesinto conflicts.The fix is boring and obvious: pick one order and keep every JSON file in it.The catch is that "one order" is more sub

Why Isn’t My 3D View Transition Working?

If you have played around with view transition a bunch, you may have noticed that 3D transitions between two pages (i.e., cross-document view transitions) don&#8217;t seem to work. That is, at least not without the browsers flattening things first.Image elements are the best example to demonstrate this because, like the snapshots a browser takes of the before-after states in a view transition, images are replaced elements so, in theory, we should be able to use them as a sort of reduced test cas

Reading typed config from .env in TypeScript

Number(process.env.PORT) || 3000That line shows up in a lot of config files, and it has two bugs hiding in it.Misspell PORT in your .env and you don't get an error, you get 3000, and you find out in production. Want to set PORT=0 on purpose? You can't: Number('0') || 3000 is 3000 too. The || fallback can't tell "missing" from "zero," and process.env hands you string | undefined regardless, so every read sits one coercion away from a quiet bug.I got tired of writing that coercion by hand and keep

How I built 50 offline-first developer tools (and scored 100/100 on Lighthouse)

As developers, we use mini web utilities every single day. Whether it's formatting a massive JSON file, testing a complex Regex, removing backgrounds from images, or generating a quick color palette.But I realized that almost every online tool I used shared the same frustrating problems:Slow: They require network round-trips for every single action.Ads: They are heavily bloated with popups and banners.Privacy Risks: The most dangerous part. We routinely paste sensitive company JSONs or private R

MCP Server and RAG: A Simple Introduction for Developers

AI tools are becoming more useful for developers, but they still have one big problem: they do not automatically know your private files, your latest docs, your local database, or your project rules.Two ideas help solve this:RAG gives AI the right information before it answers.MCP servers let AI tools safely use your local tools and data.Together, they make AI feel less like a generic chatbot and more like a useful coding partner. What Is RAG?RAG means retrieval-augmented generation.In simp

JavaScript Naming Conventions

Programming has many naming conventions used to write clean and readable codeStyleExamplecamelCasefirstNamePascalCaseFirstNamesnake_casefirst_nameUPPER_SNAKE_CASEMAX_SIZEkebab-casefirst-nameTrain-CaseFirst-NameflatcasefirstnameUPPERCASEFIRSTNAMEcamel_Snake_Casefirst_NameMost Common Styles:1. camelCase:firstNamemobileNumberUsed for:VariablesFunctions2. PascalCase:FirstNameStudentDetailsUsed for:ClassesComponents3. snake_case:first_namemobile_numberCommon in:PythonDatabases4. UPPER_SNAKE_CASE:MAX_

Function

Function:A Function is a block of code written to perform a specific task.Instead of writing the same code multiple times, we can place it inside a Function and call it whenever needed.1. Parameters (In Function Definition):Parameters are the variables written when creating a functionfunction biriyani(rice, masala, chicken) { console.log(rice, masala, chicken);}Here:rice, masala, chickenThese are called Parameters2. Arguments (In Function Call):Arguments are the actual values passed when call

<Activity /> component - A Better Way to Hide Components Without Losing State

What is the use of Activity Component?We can hide the components without losing their state. What problem it resolve?Most developers use Conditional Rendering for component hiding. When a component disappears, React completely unmounts it. This means:State is lostEffects are destroyedForm inputs resetScroll positions disappearExpensive components re-render again later{visible &amp;&amp; &lt;Test/&gt;} How to use it? Test.jsximport React, { useState } from 'react'function Te

I Built a Simple Online Tone Generator That Runs Directly in the Browser

Recently I built a small browser-based audio tool called TonePanel:👉 https://tonepanel.orgIt is an online tone generator that lets you play steady tones from 20 Hz to 20 kHz directly in the browser. You can switch between common waveforms like sine, square, sawtooth, and triangle, without installing anything.The idea was simple: I wanted a clean tool for quick audio checks — something useful for testing speakers, headphones, frequency response, or just understanding how different Hz ranges sound

Vue to React Migration in Action: Real CRM Admin Case

This is a hands-on migration walkthrough designed to take you from a standard Vue 3 + Vue Router admin project to a complete VuReact migration cycle.In this guide, you will learn:how to clone and install the example repositoryhow to locate the key migration files through the project structurehow to run the build and inspect the generated React outputhow to start the generated application and verify business flowsIf you want to try it online first, use the links below:Repository: https://github.c

SVAR Calendar: A Free, Modern Event Calendar for React, Svelte & Vue

If you’re looking for an event calendar for your web app and considering ready-to-use libraries, you’ve probably noticed that many open-source options cover the basics but leave you to build the rest yourself. On the other hand, enterprise-grade tools often include the features you need, but they also come with a higher price tag and more complexity.SVAR Calendar addresses both of these pain points at once — a modern, framework-native event calendar for React, Svelte, and Vue with a free MIT-lic

Vue 3 composition API patterns: composables, provide/inject, and reactivity deep dive

Vue 3 composition API patterns: composables, provide/inject, and reactivity deep dive Understanding the Core ConceptsVue 3 composition API transforms how developers organize and reuse logic. Composables replace mixins, provide/inject enables dependency injection, and the reactivity system powers fine-grained updates.Developer productivity is determined more by environment and tools than by individual effort. Investing in your tooling, workflow, and development environment compounds ov

Ride Hailing App Development: Transforming the Future of Urban Transportation

The transportation industry has undergone a remarkable transformation over the past decade, driven by rapid advancements in mobile technology and changing consumer expectations. People today prefer convenience, speed, and flexibility when booking transportation services. This shift has significantly increased the demand for digital mobility solutions, making Ride Hailing App Development one of the fastest-growing sectors in the technology industry.Ride hailing applications enable users to book r

Understanding useMemo in React

React provides several hooks to improve performance and manage state efficiently. One of these hooks is useMemo, which is used to memoize expensive calculations and avoid unnecessary re-computations during component re-renders. What is useMemo?useMemo is a React Hook that stores the result of a calculation and only recalculates it when one of its dependencies changes. This helps improve application performance by preventing expensive operations from running on every render. Syntaxconst

This Week In React #285 : React.foundation, Rust Compiler, Sätteri | Runtimes, JSI, Standard Navigation | VoidZero, npm, Rolldown, Angular

Hi everyone, Seb and Jan here 👋!This week, we’re taking a look at the new React Foundation website, as the React core repositories transition to their new home. All eyes on the React Compiler in Rust, coming soon in your everyday toolchain.React Native 0.86 is almost here, but releases apparently like to land on Wednesday evenings 😅 so we’ll cover it next week. Let’s focus on React Native Runtimes instead, a quite interesting multi-threading innovation.Cloudflare has acquired VoidZero, and npm v

Localizing a Shopify Customer Account Extension: 42 Languages, One Rails Server, and a Cache That Never Hit

A customer in São Paulo opens their order status page. Shopify renders the whole page in Portuguese — and then our order editing widget shows up in the middle of it speaking English.Worse: the merchant can't fix it. The copy is baked into the extension bundle at deploy time. "Cancel order" reads the same for a boutique in Berlin and a streetwear brand in Tokyo, in a language most of their customers don't shop in.This is the story of how I built localization for PostCo's Order Editing app end-to-