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JS variables , Functions &Objects
Variableslet-- a keyword used to declare re-assignable, block-scoped local variables.var-- re- declaring the values.const-- you can't change the values.Complier -- debug your whole program and translate to the machineIntrepreter -- line by line debug and translates them to the machine.FunctionThe function name should starts with lowercase, declaring the function and calling it (invoking) a reusable block of code designed to perform a specific task.eg: function subj(tam, eng, math, sci, ss){
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Day 11: Learning JavaScript Objects & Constructors š
1.ObjectsToday i continued learning Javascript and learned about Objects,Object properties,constructors.An object is used to store related data using key-value pairs``javascriptlet student = { name: "Saravanan", age: 33, course: "JavaScript"};console.log(student);` 2.Reassigning a propertyWe can change the value of an object's property`student.age = 34;console.log(student.age);` 3.ConstructorA constructor function can be used to create multiple objects with the same str
I built a 3D system design simulator to stop hand-waving architectures
I built a 3D system design simulator to stop hand-waving architecturesSystem design interviews and architecture reviews share a problem: we draw boxes and arrows on a whiteboard and assert things like "the cache absorbs most of this" or "we'll just auto-scale." Nobody checks. I wanted a toy where you can actually watch those claims break ā so I built one.Give it a try at https://system-design-simulator-navy.vercel.app/ What it isSystem Design 3D Simulator is a web app: you compose inf
Build a CRUD app with a JavaScript grid, Node and DynamoDB. Part 1: read the data
This is the dev.to edition of a tutorial that lives, with a live copy of the finished grid you can try, at latticegrid.dev/tutorials/crud-dynamodb-part-1.This is the first of a short series that builds a working application fromnothing: a DynamoDB table, a Node Lambda function in front of it, and a webpage that shows the data in a grid. Part 1 ends with a page that readsproducts from your own AWS account. Later parts add creating, editing anddeleting rows.It is deliberately basic. Everything is
Load JavaScript when a feature needs it: introducing CycleWire
Load JavaScript when a feature needs it: introducing CycleWireA server-rendered page can already contain everything a visitor needs to read. Its interactive features may only become relevant later: opening a dialog, focusing a date picker, or using a filter.CycleWire lets you connect those features to JavaScript modules that load on demand.Iām the author of the project. Its interactive website is built entirely with CycleWire, so you can explore a working example before installing anything
5 Free Client-Side Developer Tools You Didn't Know You Needed (And Why Stop Pasting Data into Random Cloud Sites)
As developers, we reach for quick browser utilities dozens of times a day: formatting messy API responses, decoding a JWT auth token, capturing a quick video bug report, or stripping an image background for a staging site mock-up.But here is the catch: most traditional online developer tools send your inputs to remote backend servers. Pasting an authorization header JWT token or raw customer JSON payload into a random online tool can accidentally expose secret keys, API tokens, or customer PII t
Building a Cancellable Web Audio Tone Sequence (and the CSS Bug That Hid Nothing)
I recently added a small feature to a browser bass test: a "step-down" that plays 150, 120, 100, 80, 63, 50, 40, 31.5, 25 and 20 Hz in turn, while you press I can't hear it at the first step you lose. It sounds like ten lines of code. It turned into a nice little lesson in cancellation, clicks and one CSS gotcha. 1. Sequencing tones with async/awaitThe simplest version is a loop that creates an oscillator per step and waits:const wait = (s) => new Promise((r) => setTimeout(r, s * 1000
Building a Free Browser MMORPG with Babylon.js, Meteor and Colyseus
Building an MMO is a hard undertaking. Many decisions have to be made, for example how to synchronize player states, structuring maps, making the world easily explorable and more. I decided to use technologies that are robust and (in case of Meteor) I already know. In this post I will explain why I chose the technologies that I did and how I implemented the features needed for a modern browser based MMORPG. Babylon.jsThe first decision that I had to make is which rendering engine to use. Th
Flesch-Kincaid & Lexical Diversity: Automating Content Readability Analysis
Engineering teams writing technical documentation and landing pages often fall into one of two extremes:Academic Over-Complexity: Writing dense, multi-clause paragraphs packed with passive voice that exhaust the reader.Oversimplified Marketing Fluff: Using buzzwords without concrete technical substance, triggering zero interest from real developers.In ā” PLYXO (CRO ā¢ SEO ā¢ AIO ā¢ AEO ā¢ GEO), our content audit pipeline programmatically measures Flesch-Kincaid Reading Ease and Type-Token Lexical Div
Why Hindsight Needs the Reason a Fix Failed
Why Hindsight Needs the Reason a Fix FailedThe most useful thing an incident agent can remember is not that someone restarted a service. It is that the restart bought 25 minutes, the errors returned, and the connection leak was still there.That distinction is the center of the incident memory system I built. It collects what engineers learned during an outage, retrieves relevant experience when another incident arrives, and gives an investigator that context without letting history masquer
macOS Golden Gate Is a Buggy Mess
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Deploying React 19 Server Actions to production ā CSRF, edge caching, and the failure modes the demo never shows
The useActionState post covers the hook API. https://monalisadas-knowme.vercel.app/blog/react-19-useactionstate-from-usestate-chaos-to-server-action-clarityThis one covers what happens the moment you deploy: unsigned POST endpoints your scanner flags, CDN layers that start caching action responses, and error surfaces that don't map cleanly to client-side mutation patterns.The useActionState demo is clean. A form submits, the server runs, the state updates. No fetch, no JSON, no loading flags sca
Unsurprisingly, Meta's new Muse AI agent blatantly ignores users permissions
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America.gov ā Whatever you need from government, start here
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RecallDesk: Turning Persistent AI Memory into a Practical Support Workspace
RecallDesk: Turning Persistent AI Memory into a Practical Support WorkspaceWhen critical infrastructure fails, the engineers diagnosing the outage rarely suffer from a lack of information. Instead, they suffer from fragmented information. During an active incident, a support specialist typically juggles customer CRM profiles, chat threads, closed ticket archives, and runbooks, all trying to answer one question: Have we seen this failure with this customer before, and what actually fixed it
The Missing Feedback Loop Behind Our Support Agent
The Missing Feedback Loop Behind Our Support AgentAn AI support agent can produce a convincing answer and still fail at one important job: learning from what actually happened.That was the problem behind ResolveIQ. A support agent could analyze a customer issue and generate a recommendation, but a recommendation alone does not create useful experience. If an action succeeds, the system should be able to use that experience later. If it fails, that outcome should matter too.We built ResolveIQ aro
Decision Gate: An AI That Remembers What Your Organization Already Tried
A working checkpoint for organizational memoryMost company knowledge-base tools stop at search: they find an old document and hand it to you.Decision Gate does something more useful.It reads a new proposal, recalls the organization's documented past attempts at something similar, and checks ā condition by condition ā whether the specific reasons those attempts failed are still present in the new plan.It never says approve or reject.Instead, it gives the human decision-maker a precedent rep
The AI Writes Better React than Vue
In May 2025 a team at ByteDance published Web-Bench, a coding benchmark with an unusual detail tucked into its appendix. It gives the same tasks to four UI frameworks (React, Vue, Angular and Svelte) and checks every result with end-to-end tests. The model that led their overall results was Claude 3.7 Sonnet. With thinking turned off it passed 65% of the tasks in React. In Vue it passed 30%.I also tried testing this on two projects, and sure enough, the AI is better trained or, I would say, has
React Components
Earlier, the developers write more than thousands of lines of code for developing a single page application. These applications follow the traditional DOM structures, and making changes in them was a very challenging task. If any mistake found, it manually searches the entire application and update accordingly. The component-based approach was introduced to overcome an issue. In this approach, the entire application is divided into a small logical group of code, which is known as components.A Co
