Practical articles about modern web development — JavaScript, TypeScript, CSS, performance, and more.https://blog.kingtechnologies.dev/en-ushttps://blog.kingtechnologies.dev/blog/2026-03-10-vitest-start-tdd-in-ai-era/https://blog.kingtechnologies.dev/blog/2026-03-10-vitest-start-tdd-in-ai-era/Get started with Vitest — the blazing-fast Vite-powered test framework. Learn TDD with the Red/Green/Refactor cycle, mocking, snapshot testing, and how AI tools complement a solid testing workflow.Tue, 10 Mar 2026 00:00:00 GMTTestingvitesttestingtddjavascripttypescriptviteKing Technologieshttps://blog.kingtechnologies.dev/blog/2026-03-07-feature-flags-the-release-superpower-youre-missing/https://blog.kingtechnologies.dev/blog/2026-03-07-feature-flags-the-release-superpower-youre-missing/Learn how feature flags let you deploy code anytime and release features on your own terms — covering types of flags, building your own system, canary deployments, and best practices to avoid flag debt.Sat, 07 Mar 2026 00:00:00 GMTDevOpsfeature-flagsdeploymentdevopsjavascriptrelease-engineeringKing Technologieshttps://blog.kingtechnologies.dev/blog/2026-02-01-just-is-my-goto-command-now/https://blog.kingtechnologies.dev/blog/2026-02-01-just-is-my-goto-command-now/Why I switched from make to just as my daily command runner — covering discoverability, documentation, parameters, environment variables, platform-specific recipes, and chaining commands.Sun, 01 Feb 2026 00:00:00 GMTDeveloper Toolsjustmakeclideveloper-toolsproductivityautomationKing Technologieshttps://blog.kingtechnologies.dev/blog/2025-12-15-create-component-package/https://blog.kingtechnologies.dev/blog/2025-12-15-create-component-package/A step-by-step guide to creating a reusable Svelte component library as an npm package — from project setup with sv create, configuring package.json exports, TypeScript support, and publishing to npm.Mon, 15 Dec 2025 00:00:00 GMTSveltesveltenpmcomponent-librarytypescriptpackage-developmentKing Technologieshttps://blog.kingtechnologies.dev/blog/2025-12-01-isolates-in-dart/https://blog.kingtechnologies.dev/blog/2025-12-01-isolates-in-dart/Understand how Dart Isolates enable true parallel execution, how to spawn and communicate with them, and when to use Isolates vs compute() vs async/await in your Flutter applications.Mon, 01 Dec 2025 00:00:00 GMTFlutterdartflutterisolatesconcurrencyperformanceKing Technologieshttps://blog.kingtechnologies.dev/blog/2025-11-25-best-ways-to-handle-environemtn-variables-in-typescript/https://blog.kingtechnologies.dev/blog/2025-11-25-best-ways-to-handle-environemtn-variables-in-typescript/Learn how to safely load, validate, and type environment variables in TypeScript using Zod, dotenv, and a centralized config module — so you get compile-time safety and runtime validation instead of silent undefined errors.Tue, 25 Nov 2025 00:00:00 GMTTypeScripttypescriptenvironment-variableszodnodejsbest-practicesKing Technologieshttps://blog.kingtechnologies.dev/blog/2025-11-10-advance-fetch/https://blog.kingtechnologies.dev/blog/2025-11-10-advance-fetch/Master the Fetch API with advanced techniques including request cancellation with AbortController, interceptors, retry logic, streaming responses, and building a robust fetch wrapper for production apps.Mon, 10 Nov 2025 00:00:00 GMTJavaScriptjavascriptfetchweb-apiasynchttpKing Technologieshttps://blog.kingtechnologies.dev/blog/2025-10-24-ai_os/https://blog.kingtechnologies.dev/blog/2025-10-24-ai_os/AI OS is an open-source global operating system developed by the world, for the world — designed to solve human problems collectively and ensure everyone has access to basic needs.Fri, 24 Oct 2025 00:00:00 GMTOpen Sourceopen-sourceaioperating-systemvisioncommunityKing Technologieshttps://blog.kingtechnologies.dev/blog/2025-10-22-database_concepts/https://blog.kingtechnologies.dev/blog/2025-10-22-database_concepts/A complete guide to core, intermediate, and advanced database concepts — from normalization and sharding to CAP theorem, MVCC, and beyond.Wed, 22 Oct 2025 00:00:00 GMTDatabasesdatabasesbackendscalabilityengineeringshardingcap-theoremKing Technologieshttps://blog.kingtechnologies.dev/blog/2025-10-15-how-rls-works-and-how-to-implement-it/https://blog.kingtechnologies.dev/blog/2025-10-15-how-rls-works-and-how-to-implement-it/A complete guide to PostgreSQL Row-Level Security — what it is, how policies work, and how to implement multi-tenant data isolation using RLS in real applications.Wed, 15 Oct 2025 00:00:00 GMTDatabasespostgresqlrlssecuritydatabasesmulti-tenancybackendKing Technologieshttps://blog.kingtechnologies.dev/blog/2025-10-05-node_js_unknown_features/https://blog.kingtechnologies.dev/blog/2025-10-05-node_js_unknown_features/Discover powerful built-in Node.js features you may have been installing packages for — SQLite support, native timers/promises, .env file loading, AsyncLocalStorage, Glob, WebSocket client, and the built-in test runner.Sun, 05 Oct 2025 00:00:00 GMTNode.jsnodejsjavascriptbackendbuilt-inperformanceKing Technologieshttps://blog.kingtechnologies.dev/blog/2025-09-20-how-vim-works-best-for-developers-5-best-vim-tips/https://blog.kingtechnologies.dev/blog/2025-09-20-how-vim-works-best-for-developers-5-best-vim-tips/Learn how to use Vim effectively as a developer with 5 essential tips covering motions, text objects, macros, marks, and the dot command — the techniques that make Vim genuinely faster than any other editor.Sat, 20 Sep 2025 00:00:00 GMTDeveloper Toolsvimneovimproductivityeditordeveloper-toolsKing Technologieshttps://blog.kingtechnologies.dev/blog/2025-09-10-how-mutti-tenant-systems-are-created-with-example-in-node-js--laravel/https://blog.kingtechnologies.dev/blog/2025-09-10-how-mutti-tenant-systems-are-created-with-example-in-node-js--laravel/A practical guide to multi-tenancy architecture: understand the three isolation models (database-per-tenant, schema-per-tenant, shared schema), then build a fully working multi-tenant Express + PostgreSQL app from scratch.Wed, 10 Sep 2025 00:00:00 GMTBackendnodejsmulti-tenancypostgresqlsaasbackendarchitectureKing Technologieshttps://blog.kingtechnologies.dev/blog/2025-08-15-css-new-features-that-are-absolutely-stunning/https://blog.kingtechnologies.dev/blog/2025-08-15-css-new-features-that-are-absolutely-stunning/Explore the most exciting new CSS features: CSS If, Cascade Layers, enhanced attr(), Container Queries, @supports, Corner Shape, CSS Nesting, the :is() function, and the full spectrum of modern CSS color formats.Fri, 15 Aug 2025 00:00:00 GMTCSScssweb-developmentfrontenddesignweb-standardsKing Technologieshttps://blog.kingtechnologies.dev/blog/2025-07-10-imports-in-flutter/https://blog.kingtechnologies.dev/blog/2025-07-10-imports-in-flutter/Master Dart's import system — using hide and show to resolve naming conflicts, deferred loading for code splitting, aliasing packages, and conditional imports for platform-specific code.Thu, 10 Jul 2025 00:00:00 GMTFlutterdartflutterimportscode-splittingbest-practicesKing Technologieshttps://blog.kingtechnologies.dev/blog/2024-12-01-getting-started-with-astro/https://blog.kingtechnologies.dev/blog/2024-12-01-getting-started-with-astro/Learn how to build blazing-fast websites with Astro, the modern static site builder that delivers less JavaScript and more performance by default.Sun, 01 Dec 2024 00:00:00 GMTWeb Developmentastrojavascriptstatic-sitesperformanceweb-developmentKing Technologieshttps://blog.kingtechnologies.dev/blog/2024-11-15-web-performance-tips/https://blog.kingtechnologies.dev/blog/2024-11-15-web-performance-tips/Discover the most impactful web performance techniques to make your websites lightning-fast, from image optimization and lazy loading to caching strategies and critical CSS.Fri, 15 Nov 2024 00:00:00 GMTPerformanceperformanceweb-developmentjavascriptcssoptimizationKing Technologieshttps://blog.kingtechnologies.dev/blog/2024-10-20-typescript-best-practices/https://blog.kingtechnologies.dev/blog/2024-10-20-typescript-best-practices/Master TypeScript with these essential best practices covering type safety, generics, utility types, strict configuration, and patterns that make your codebase more maintainable.Sun, 20 Oct 2024 00:00:00 GMTTypeScripttypescriptjavascripttypesbest-practicesweb-developmentKing Technologieshttps://blog.kingtechnologies.dev/blog/2024-09-10-css-grid-complete-guide/https://blog.kingtechnologies.dev/blog/2024-09-10-css-grid-complete-guide/Master CSS Grid with clear visual examples covering grid containers, tracks, areas, alignment, responsive patterns, and real-world layout techniques.Tue, 10 Sep 2024 00:00:00 GMTCSScssgridlayoutresponsiveweb-developmentKing Technologieshttps://blog.kingtechnologies.dev/blog/2024-08-05-building-with-sveltekit/https://blog.kingtechnologies.dev/blog/2024-08-05-building-with-sveltekit/Learn how to build production-ready full-stack applications with SvelteKit, covering routing, server-side rendering, API routes, authentication, and deployment.Mon, 05 Aug 2024 00:00:00 GMTSvelteKitsveltekitsveltejavascriptfull-stackweb-developmentKing Technologieshttps://blog.kingtechnologies.dev/blog/2022-08-31-whats-new-in-flutter-33/https://blog.kingtechnologies.dev/blog/2022-08-31-whats-new-in-flutter-33/Flutter 3.3 is here with 5500+ merged PRs — covering major performance improvements for Flutter Web, Material 3 updates, improved text rendering, global selection support, and Dart 2.18 features.Wed, 31 Aug 2022 00:00:00 GMTFlutterflutterdartmobileflutter-3cross-platformKing Technologieshttps://blog.kingtechnologies.dev/blog/2021-10-13-how-to-write-tests-in-postman---api-testing/https://blog.kingtechnologies.dev/blog/2021-10-13-how-to-write-tests-in-postman---api-testing/A practical guide to API testing with Postman — writing test scripts using the pm.test API, validating response status codes, response bodies, headers, and chaining requests with environment variables.Wed, 13 Oct 2021 00:00:00 GMTTestingpostmanapi-testingtestingrest-apibackendKing Technologieshttps://blog.kingtechnologies.dev/blog/2021-06-03-how-to-create-a-pwa/https://blog.kingtechnologies.dev/blog/2021-06-03-how-to-create-a-pwa/A complete step-by-step guide to turning any web app into a PWA — covering the Web App Manifest, Service Workers, offline support, push notifications, and installability on any platform.Thu, 03 Jun 2021 00:00:00 GMTWeb Developmentpwaservice-workerweb-developmentjavascriptofflineKing Technologieshttps://blog.kingtechnologies.dev/blog/2021-05-30-windows-package-manager-10/https://blog.kingtechnologies.dev/blog/2021-05-30-windows-package-manager-10/WinGet 1.0 is here — Microsoft's official package manager for Windows. Learn how to install, update, and manage software from the command line, and why this changes how Windows developers work.Sun, 30 May 2021 00:00:00 GMTDeveloper Toolswindowswingetpackage-managerclideveloper-toolsKing Technologieshttps://blog.kingtechnologies.dev/blog/2021-05-19-android-12-is-on-its-way/https://blog.kingtechnologies.dev/blog/2021-05-19-android-12-is-on-its-way/A look at Android 12's biggest changes — Material You design language, privacy dashboard, notification permission changes, improved scrolling, and performance improvements coming to Pixel and partner devices.Wed, 19 May 2021 00:00:00 GMTAndroidandroidmobilegooglematerial-designandroid-12King Technologieshttps://blog.kingtechnologies.dev/blog/2021-05-13-how-to-create-a-virtual-assistant-using-python/https://blog.kingtechnologies.dev/blog/2021-05-13-how-to-create-a-virtual-assistant-using-python/Build your own voice-activated virtual assistant in Python — covering speech recognition, text-to-speech, automating tasks like opening applications, fetching weather, reading news, and sending emails.Thu, 13 May 2021 00:00:00 GMTPythonpythonautomationvoice-assistantspeech-recognitionnlpKing Technologieshttps://blog.kingtechnologies.dev/blog/2021-05-02-css---second-step-towards-web-development/https://blog.kingtechnologies.dev/blog/2021-05-02-css---second-step-towards-web-development/A beginner-friendly introduction to CSS — selectors, properties, the box model, Flexbox, Grid, colors, and the key concepts every web developer needs to know to start styling web pages.Sun, 02 May 2021 00:00:00 GMTCSScssweb-developmentfrontendbeginnershtmlKing Technologieshttps://blog.kingtechnologies.dev/blog/2021-04-26-how-to-write-stunning-github-readmemd-template-provided/https://blog.kingtechnologies.dev/blog/2021-04-26-how-to-write-stunning-github-readmemd-template-provided/A practical guide to writing GitHub README files that make your projects shine — covering structure, markdown tips, badges, screenshots, installation guides, and a ready-to-use template.Mon, 26 Apr 2021 00:00:00 GMTOpen Sourcegithubreadmemarkdownopen-sourcedocumentationKing Technologieshttps://blog.kingtechnologies.dev/blog/2021-04-25-what-should-be-your-packagejson/https://blog.kingtechnologies.dev/blog/2021-04-25-what-should-be-your-packagejson/Package.json is the Core file of the Node.js System. It is the manifest file of any Node project and contains all the configuration, dependencies, and metadata about the project. As a form extension, you can say it is a JSON(JavaScript Object Notation) file. So, you should know a bit about JSON before working on this file. A lot of things described in this file are affected at the configuration time.Sun, 25 Apr 2021 00:00:00 GMTWeb Developmenttypescriptjavascripttypesbest-practicesweb-developmentKing Technologies