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<!DOCTYPE html>
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<head>
<style>
h1 { color: #00bcd4; }
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<h1>Hello Merik!</h1>
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</html>React: Components, State and Thinking in UI
The mental shift from editing the DOM to describing it. JSX, props, useState, lists and keys, and us...
Data Structures and Big-O Without the Maths Degree
Why some code is fast and some code dies at scale. Big-O in plain language, arrays versus maps and s...
Arrays and Objects: Shaping Data Like a Professional
map, filter, reduce and find, the four methods that replace almost every for loop you will ever writ...
Fetch and APIs: Getting Real Data Into Your Page
Every real app talks to a server. Learn fetch, JSON, async/await and (the part tutorials skip) what ...
npm and the JavaScript Toolchain
What actually happens when you run npm install. package.json, semver ranges, lockfiles, scripts, aud...
TypeScript: Catching Bugs Before They Run
JavaScript with types, explained without the jargon. Annotations, interfaces, unions, optional value...
Node.js & Express Basics
Backend JavaScript. Build REST APIs, handle routes, connect to databases, deploy to the web....
Learn by Actually Building
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Live Playground
Every lesson has HTML/CSS/JS editors with instant preview. Learn by doing, not just watching.
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