https://mosaddik.dev/blogPractical guides on Wix Velo, JavaScript, React, AI, databases and system design.enhttps://mosaddik.dev/blog/git-undo-mistakeshttps://mosaddik.dev/blog/git-undo-mistakesFri, 30 Oct 2026 07:30:00 GMTUndo almost anything in Git: unsaved edits, a bad commit, a pushed commit or a lost branch, with the right command for each and when it's safe.https://mosaddik.dev/blog/title-tags-meta-descriptionshttps://mosaddik.dev/blog/title-tags-meta-descriptionsThu, 29 Oct 2026 20:10:00 GMTPractical rules for page titles and meta descriptions: length, wording, what Google does with them, real examples, and which ones to fix first.https://mosaddik.dev/blog/javascript-error-handlinghttps://mosaddik.dev/blog/javascript-error-handlingThu, 29 Oct 2026 20:04:00 GMTHow to handle errors in JavaScript properly: try, catch and finally, custom error classes, errors in async code and fetch, and the mistakes that hide bugs.https://mosaddik.dev/blog/sql-joins-explainedhttps://mosaddik.dev/blog/sql-joins-explainedThu, 29 Oct 2026 19:58:00 GMTHow SQL joins work, using a small shop database: INNER and LEFT joins, finding missing rows, many-to-many, and two mistakes that give wrong totals.https://mosaddik.dev/blog/wix-studio-vs-wix-editorhttps://mosaddik.dev/blog/wix-studio-vs-wix-editorThu, 29 Oct 2026 19:52:00 GMTThe three ways to build a Wix site in 2026 compared: who each editor is for, what they can and can't do, and whether you can move a site between them.https://mosaddik.dev/blog/wix-triggered-email-setuphttps://mosaddik.dev/blog/wix-triggered-email-setupThu, 29 Oct 2026 19:29:00 GMTA click-by-click guide to setting up a Wix Triggered Email: turn on code, add a sender, design the email, add variables and copy the code snippet.https://mosaddik.dev/blog/git-branching-workflowhttps://mosaddik.dev/blog/git-branching-workflowThu, 29 Oct 2026 18:50:00 GMTA Git workflow for teams of one to ten: short-lived branches, pull requests and a main branch that’s always deployable, with the exact commands.https://mosaddik.dev/blog/ai-customer-data-privacyhttps://mosaddik.dev/blog/ai-customer-data-privacyThu, 29 Oct 2026 18:44:00 GMTWhat customer data is safe to send to an AI API, what to keep out, and simple ways to protect it when you add AI to your website or workflow.https://mosaddik.dev/blog/javascript-debounce-throttlehttps://mosaddik.dev/blog/javascript-debounce-throttleThu, 29 Oct 2026 18:38:00 GMTWhat debounce and throttle do, how to write each in a few lines of JavaScript, when to use which, and how to debounce a search box in React.https://mosaddik.dev/blog/google-search-console-guidehttps://mosaddik.dev/blog/google-search-console-guideThu, 29 Oct 2026 18:32:00 GMTSet up Google Search Console for your website, submit your sitemap, and learn the four reports worth checking once a month to catch problems early.https://mosaddik.dev/blog/wix-vs-wordpresshttps://mosaddik.dev/blog/wix-vs-wordpressThu, 29 Oct 2026 18:26:00 GMTAn honest comparison of Wix and WordPress for small business sites from a Wix developer: cost, upkeep, flexibility, SEO, and who each one suits.https://mosaddik.dev/blog/wix-velo-send-emailhttps://mosaddik.dev/blog/wix-velo-send-emailThu, 29 Oct 2026 18:20:00 GMTSend a personalised email from your Wix site when someone fills in a form, using a Triggered Email template, a contact and a few lines of Velo code.https://mosaddik.dev/blog/technical-debt-explainedhttps://mosaddik.dev/blog/technical-debt-explainedThu, 29 Oct 2026 12:10:00 GMTWhat technical debt means in plain words, how it slows a project down, how to spot it, and a practical way to pay it down without stopping new work.https://mosaddik.dev/blog/testing-pyramid-explainedhttps://mosaddik.dev/blog/testing-pyramid-explainedThu, 29 Oct 2026 12:05:00 GMTWhat unit, integration and end-to-end tests are, how many of each to write, an example with Node’s built-in test runner, and what to test first.https://mosaddik.dev/blog/how-to-structure-a-backend-projecthttps://mosaddik.dev/blog/how-to-structure-a-backend-projectThu, 29 Oct 2026 12:00:00 GMTA proven way to organise a Node.js and Express backend into routes, services and repositories, with folders by feature and code that’s easy to test.https://mosaddik.dev/blog/monolith-vs-microserviceshttps://mosaddik.dev/blog/monolith-vs-microservicesThu, 29 Oct 2026 11:55:00 GMTThe real trade-offs between a monolith and microservices, why most projects should start with a modular monolith, and when to split off a service.https://mosaddik.dev/blog/how-to-scale-a-web-apphttps://mosaddik.dev/blog/how-to-scale-a-web-appThu, 29 Oct 2026 11:50:00 GMTHow a web app grows from one server to many: load balancers, caching, read replicas, queues and CDNs, and when each step is worth it.https://mosaddik.dev/blog/message-queues-background-jobshttps://mosaddik.dev/blog/message-queues-background-jobsThu, 29 Oct 2026 11:45:00 GMTWhy slow work like emails and API calls belongs in a background job, how queues, workers and retries fit together, with a small working job queue.https://mosaddik.dev/blog/caching-explainedhttps://mosaddik.dev/blog/caching-explainedThu, 29 Oct 2026 11:40:00 GMTHow caching makes sites and APIs faster: browser, CDN and server caches, Cache-Control headers, a Node.js example, and how to avoid showing stale data.https://mosaddik.dev/blog/rate-limiting-explainedhttps://mosaddik.dev/blog/rate-limiting-explainedThu, 29 Oct 2026 11:35:00 GMTWhat rate limiting is, how fixed window and token bucket limits work, a working Express middleware, and how to set limits that don’t block real users.https://mosaddik.dev/blog/idempotency-explainedhttps://mosaddik.dev/blog/idempotency-explainedThu, 29 Oct 2026 11:30:00 GMTWhat idempotency means, why retries create duplicate orders and charges, and how idempotency keys and unique constraints make requests safe to repeat.https://mosaddik.dev/blog/authentication-sessions-jwt-api-keyshttps://mosaddik.dev/blog/authentication-sessions-jwt-api-keysThu, 29 Oct 2026 11:25:00 GMTHow login works on the web, authentication vs authorisation, and when to use session cookies, JWTs or API keys, with the security settings that matter.https://mosaddik.dev/blog/rest-api-design-best-practiceshttps://mosaddik.dev/blog/rest-api-design-best-practicesThu, 29 Oct 2026 11:20:00 GMTHow to design a REST API that’s easy to use, with examples for URLs, HTTP methods, status codes, error messages, pagination and versioning.https://mosaddik.dev/blog/database-transactions-explainedhttps://mosaddik.dev/blog/database-transactions-explainedThu, 29 Oct 2026 11:15:00 GMTWhat a database transaction is, ACID in plain words, BEGIN, COMMIT and ROLLBACK in code, and how to stop two orders selling the last item twice.https://mosaddik.dev/blog/sql-vs-nosqlhttps://mosaddik.dev/blog/sql-vs-nosqlThu, 29 Oct 2026 11:10:00 GMTThe real differences between SQL and NoSQL databases, with the same data stored both ways, the kinds of NoSQL, and a simple way to choose for your project.https://mosaddik.dev/blog/database-indexes-explainedhttps://mosaddik.dev/blog/database-indexes-explainedThu, 29 Oct 2026 11:05:00 GMTWhat a database index is, how it turns a full table scan into a quick lookup, which columns to index, how column order works, and what indexes cost.https://mosaddik.dev/blog/database-design-basicshttps://mosaddik.dev/blog/database-design-basicsThu, 29 Oct 2026 11:00:00 GMTHow to design a relational database step by step, with a small shop example covering tables, primary and foreign keys, relationships and constraints.https://mosaddik.dev/blog/internal-linking-for-seohttps://mosaddik.dev/blog/internal-linking-for-seoThu, 29 Oct 2026 07:31:00 GMTHow links between your own pages help Google find, understand and rank them, with practical rules for menus, anchor text, blog posts and service pages.https://mosaddik.dev/blog/ai-tokens-context-windowhttps://mosaddik.dev/blog/ai-tokens-context-windowThu, 29 Oct 2026 07:30:00 GMTWhat tokens and context windows mean in AI models like Claude and ChatGPT, how they affect cost, speed and quality, and how to keep AI features affordable.https://mosaddik.dev/blog/nodejs-event-loop-explainedhttps://mosaddik.dev/blog/nodejs-event-loop-explainedThu, 29 Oct 2026 07:29:00 GMTHow Node.js handles thousands of requests on one thread, what the event loop does, why some code freezes a whole server, and how to keep it responsive.https://mosaddik.dev/blog/react-forms-controlled-uncontrolledhttps://mosaddik.dev/blog/react-forms-controlled-uncontrolledThu, 29 Oct 2026 07:28:00 GMTThe difference between controlled and uncontrolled inputs in React, when each is the better choice, and how to handle submit, validation and errors.https://mosaddik.dev/blog/how-to-brief-a-wix-developerhttps://mosaddik.dev/blog/how-to-brief-a-wix-developerThu, 29 Oct 2026 07:27:00 GMTWhat to include when you hire a Wix developer, so you get a clear quote, fewer surprises and a site that does what you need. With a brief template to copy.https://mosaddik.dev/blog/wix-velo-repeatershttps://mosaddik.dev/blog/wix-velo-repeatersThu, 29 Oct 2026 07:26:00 GMTHow to fill a Wix repeater with Velo code, set each item with onItemReady, handle clicks inside items, and show or hide elements per item, with examples.https://mosaddik.dev/blog/core-web-vitals-explainedhttps://mosaddik.dev/blog/core-web-vitals-explainedThu, 29 Oct 2026 07:25:00 GMTWhat Google's Core Web Vitals measure, the scores to aim for, how to check your site, and common fixes for slow loading, slow clicks and layout shifts.https://mosaddik.dev/blog/ai-hallucinationshttps://mosaddik.dev/blog/ai-hallucinationsThu, 29 Oct 2026 07:24:00 GMTWhy AI models sometimes state wrong facts with confidence, where it matters for a business, and practical ways to reduce made-up answers in your AI features.https://mosaddik.dev/blog/nodejs-environment-variableshttps://mosaddik.dev/blog/nodejs-environment-variablesThu, 29 Oct 2026 07:23:00 GMTUse environment variables and .env files in Node.js with the built-in --env-file flag, check them at startup, and keep API keys out of Git and the browser.https://mosaddik.dev/blog/react-usememo-usecallbackhttps://mosaddik.dev/blog/react-usememo-usecallbackThu, 29 Oct 2026 07:22:00 GMTWhat useMemo and useCallback do, the few cases where they make React faster, why wrapping everything doesn't help, and what React Compiler changes.https://mosaddik.dev/blog/javascript-fetch-apihttps://mosaddik.dev/blog/javascript-fetch-apiThu, 29 Oct 2026 07:21:00 GMTHow to use fetch in JavaScript to get and send data, read JSON, add query parameters and headers, set a timeout, and catch the errors fetch doesn't throw.https://mosaddik.dev/blog/wix-velo-data-hookshttps://mosaddik.dev/blog/wix-velo-data-hooksThu, 29 Oct 2026 07:20:00 GMTHow Wix Velo data hooks work, with examples that clean up form data, block bad entries, protect fields and notify other systems when a CMS item changes.https://mosaddik.dev/blog/structured-data-explainedhttps://mosaddik.dev/blog/structured-data-explainedThu, 29 Oct 2026 07:15:00 GMTWhat structured data is, which schema types are worth adding for a small business, JSON-LD examples to copy, how to test them, and how to add them on Wix.https://mosaddik.dev/blog/move-website-to-wix-seohttps://mosaddik.dev/blog/move-website-to-wix-seoThu, 29 Oct 2026 07:14:00 GMTA step-by-step plan for moving a website from WordPress or another platform to Wix while keeping your Google traffic, with redirects, a URL map and checks.https://mosaddik.dev/blog/ai-agents-explainedhttps://mosaddik.dev/blog/ai-agents-explainedThu, 29 Oct 2026 07:13:00 GMTAI agents explained in plain words. How an agent uses tools in a loop, how it differs from a chatbot, real business examples, and the risks to plan for.https://mosaddik.dev/blog/nodejs-express-rest-apihttps://mosaddik.dev/blog/nodejs-express-rest-apiThu, 29 Oct 2026 07:12:00 GMTBuild a small REST API with Node.js and Express 5, step by step, with routes to list, create, update and delete items, input checks and error handling.https://mosaddik.dev/blog/react-usestate-mistakeshttps://mosaddik.dev/blog/react-usestate-mistakesThu, 29 Oct 2026 07:11:00 GMTWhy your React state doesn't update, shows an old value or loses changes, with six common useState mistakes, the fix for each, and code you can copy.https://mosaddik.dev/blog/javascript-map-filter-reducehttps://mosaddik.dev/blog/javascript-map-filter-reduceThu, 29 Oct 2026 07:10:00 GMTHow map, filter and reduce work in JavaScript, when to use each one, and how to combine them, with examples from real product and order data.https://mosaddik.dev/blog/rag-explainedhttps://mosaddik.dev/blog/rag-explainedWed, 28 Oct 2026 12:22:00 GMTRetrieval-augmented generation in plain words, with a small working example, so an AI assistant answers from your FAQs, docs or products instead of guessing.https://mosaddik.dev/blog/how-to-write-ai-promptshttps://mosaddik.dev/blog/how-to-write-ai-promptsWed, 28 Oct 2026 12:21:00 GMTPractical prompt-writing habits for Claude, ChatGPT and other AI tools, with before-and-after examples you can copy, plus tips for prompts inside your own apps.https://mosaddik.dev/blog/what-is-an-llmhttps://mosaddik.dev/blog/what-is-an-llmWed, 28 Oct 2026 12:20:00 GMTHow large language models like Claude and ChatGPT work, what they're good and bad at, what they cost, and how to tell if one would help your business.https://mosaddik.dev/blog/react-useeffect-explainedhttps://mosaddik.dev/blog/react-useeffect-explainedWed, 28 Oct 2026 11:20:00 GMTWhat useEffect is for, how the dependency array and cleanup work, how to fetch data without race conditions, and the cases where an effect only adds bugs.https://mosaddik.dev/blog/javascript-async-await-explainedhttps://mosaddik.dev/blog/javascript-async-await-explainedWed, 28 Oct 2026 11:19:00 GMTWhat promises are, how async and await make them readable, how to handle errors, and how to run requests in parallel, with the mistakes that cause most bugs.https://mosaddik.dev/blog/wix-dynamic-pages-explainedhttps://mosaddik.dev/blog/wix-dynamic-pages-explainedWed, 28 Oct 2026 11:18:00 GMTHow Wix dynamic pages turn one design and a CMS collection into a page for every item, with SEO settings that work for each one.https://mosaddik.dev/blog/wix-velo-form-validationhttps://mosaddik.dev/blog/wix-velo-form-validationWed, 28 Oct 2026 11:17:00 GMTAdd custom checks to Wix form inputs, such as matching emails, phone formats and dates, show clear error messages, and repeat the check on the backend.https://mosaddik.dev/blog/wix-seo-checklisthttps://mosaddik.dev/blog/wix-seo-checklistWed, 28 Oct 2026 11:16:00 GMTThe settings and habits that help a Wix site show up on Google, from page titles and URLs to Search Console, local listings and speed.https://mosaddik.dev/blog/why-your-wix-site-is-slowhttps://mosaddik.dev/blog/why-your-wix-site-is-slowWed, 28 Oct 2026 11:07:00 GMTA practical checklist for a faster Wix site, from images and apps to Velo code that delays the page, and how to measure the difference.https://mosaddik.dev/blog/wix-velo-scheduled-jobshttps://mosaddik.dev/blog/wix-velo-scheduled-jobsWed, 28 Oct 2026 11:06:00 GMTRun backend code on a schedule with jobs.config, for example a nightly cleanup of old records, and check that it ran.https://mosaddik.dev/blog/wix-velo-member-only-datahttps://mosaddik.dev/blog/wix-velo-member-only-dataWed, 28 Oct 2026 11:05:00 GMTBuild a members-only page that lists each logged-in member's own orders or bookings, with collection permissions that keep everyone else's data private.https://mosaddik.dev/blog/wix-form-to-google-sheets-velohttps://mosaddik.dev/blog/wix-form-to-google-sheets-veloWed, 28 Oct 2026 11:04:00 GMTSave every new submission to a Google Sheet automatically, using a Velo data hook and a small Google Apps Script, with no paid connector.https://mosaddik.dev/blog/add-ai-assistant-to-wix-with-velohttps://mosaddik.dev/blog/add-ai-assistant-to-wix-with-veloWed, 28 Oct 2026 09:54:00 GMTBuild a small assistant that answers visitor questions from your own facts, with the API key kept safe in the Wix Secrets Manager.https://mosaddik.dev/blog/wix-velo-http-functions-webhookshttps://mosaddik.dev/blog/wix-velo-http-functions-webhooksWed, 28 Oct 2026 09:53:00 GMTExpose an endpoint on your Wix site with Velo HTTP functions, check a secret token, save the data to a CMS collection, and test it before going live.https://mosaddik.dev/blog/wix-velo-search-filter-dynamic-pagehttps://mosaddik.dev/blog/wix-velo-search-filter-dynamic-pageWed, 28 Oct 2026 09:52:00 GMTFilter a repeater connected to a CMS collection with a search box and a dropdown, update results as the visitor types, and show a message when nothing matches.https://mosaddik.dev/blog/call-external-api-from-wix-velohttps://mosaddik.dev/blog/call-external-api-from-wix-veloWed, 28 Oct 2026 08:12:00 GMTStore the key in the Wix Secrets Manager, call the API from a backend web module, and use the result in page code. A step-by-step Velo example.