---
title: "Discussion on \"⏳ JavaScript + TypeScript Fundamentals\" | Hashnode"
description: "Discussion on \"⏳ JavaScript + TypeScript Fundamentals\". Understanding the core building blocks of JavaScript and TypeScript helps you write better code, debug faster, and build more maintainable apps. This guide covers the must-know fundamentals including variable scopes, hoisting, closures, types, classe..."
url: "https://hashnode.com/posts/javascript-typescript-fundamentals/69628ea3f609a9b82845fce9"
---

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# [⏳ JavaScript + TypeScript Fundamentals](https://olgaconstantina.hashnode.dev/javascript-typescript-fundamentals?utm_source=hashnode&utm_medium=feed)

Understanding the core building blocks of JavaScript and TypeScript helps you write better code, debug faster, and build more maintainable apps. This guide covers the must-know fundamentals including variable scopes, hoisting, closures, types, classe...

Jan 10 · 4 min read · olgaconstantina.hashnode.dev  
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-   [#javascript](https://hashnode.com/tag/javascript)
-   [#typescript](https://hashnode.com/tag/typescript)
-   [#fundamentals](https://hashnode.com/tag/fundamentals)

## Written by

[Olga Nedelcu](https://hashnode.com/@OlgaSoftware)

@OlgaSoftware · London, UK

  
[View profile](https://hashnode.com/@OlgaSoftware)

frontenddev

I'm a Product Engineer at IDnow based in Berlin, originally from Romania and raised in sunny Spain. I build accessible, user-focused web applications with React, TypeScript, and modern frontend technologies. Beyond coding, I enjoy sharing knowledge through technical documentation, Communities of Practice (CoPs), and mentoring. I'm passionate about frontend architecture, web standards, accessibility (A11y), and writing clean, maintainable code.

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