@codewithmangesh

Mangesh Jadhav

@codewithmangeshkatraj , kondhwa , puneJoined January 2026

Building skills one concept at a time

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Mangesh Jadhav's blogs

Blog with Mangeshblogwithmangesh.hashnode.dev28 posts

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MJMangesh Jadhavblogwithmangesh.hashnode.devAug 6 · 13 min read

The Magic of this, call(), apply(), and bind() in JavaScript

If you've ever run a piece of JavaScript code and gotten undefined when you expected a name, or seen this print something totally different from what you thought it would, you're not alone. This one k

MJMangesh Jadhavblogwithmangesh.hashnode.devAug 5 · 34 min read

JavaScript Promises Explained: From Callbacks to Production-Level Promise Patterns

Understand Promises deeply with diagrams, real-world examples, promise chaining, error handling, and how promises work behind the scenes. Think about the last time you ordered food online. You open t

MJMangesh Jadhavblogwithmangesh.hashnode.devAug 5 · 13 min read

Map and Set in JavaScript: The Smarter Way to Store Data

Okay so picture this. You're building a phone contacts app. Every contact has a unique phone number, and you need to pull up their name super fast when a call comes in. You also want to keep a list of

MJMangesh Jadhavblogwithmangesh.hashnode.devAug 5 · 14 min read

Spread vs Rest Operators in JavaScript: The Difference Every Developer Should Actually Understand

I used to think the three dots ... in JavaScript were just one operator with a confusing dual personality. Turns out, that's basically true — except the "personality" depends entirely on where you put

MJMangesh Jadhavblogwithmangesh.hashnode.devAug 4 · 36 min read

Destructuring in JavaScript Explained: Arrays, Objects, Defaults, Nested Destructuring & Real-World Examples

I still remember the first time I opened a React codebase at an internship and saw this line staring back at me: const { user, isLoading, error } = useAuth(); I had learned JavaScript through a "trad

Mangesh Jadhav

About

Available for

Mangesh Jadhav's blogs

Recently published

The Magic of this, call(), apply(), and bind() in JavaScript

JavaScript Promises Explained: From Callbacks to Production-Level Promise Patterns

Map and Set in JavaScript: The Smarter Way to Store Data

Spread vs Rest Operators in JavaScript: The Difference Every Developer Should Actually Understand

Destructuring in JavaScript Explained: Arrays, Objects, Defaults, Nested Destructuring & Real-World Examples

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Mangesh Jadhav

About

Available for

Mangesh Jadhav's blogs

Recently published

The Magic of this, call(), apply(), and bind() in JavaScript

JavaScript Promises Explained: From Callbacks to Production-Level Promise Patterns

Map and Set in JavaScript: The Smarter Way to Store Data

Spread vs Rest Operators in JavaScript: The Difference Every Developer Should Actually Understand

Destructuring in JavaScript Explained: Arrays, Objects, Defaults, Nested Destructuring & Real-World Examples