This content originally appeared on DEV Community and was authored by Pavan Awagan
Why You Should Learn JavaScript First.
If you're struggling with JavaScript, it's better to first build a solid understanding of the language before diving into LeetCode. Otherwise, you’ll feel stuck and frustrated. Here's the best approach to follow:
1. Master JavaScript Basics First
If you're focusing on MERN, your priority should be JavaScript. Instead of jumping straight into LeetCode, first, get comfortable with JavaScript fundamentals by practicing:
✅ Core JavaScript Concepts:
- Variables, Data Types, Functions, Scope
- Loops, Conditionals, Arrays, Objects
- Promises, Async/Await, Callbacks
- Closures, Hoisting, Prototypes, this keyword
- ES6+ Features (Arrow functions, Spread, Destructuring, etc.)
👉 Action Plan:
- Do hands-on coding → Code along with tutorials (Don’t just watch videos)
- Build mini JavaScript projects → Simple apps like a calculator, to-do list, or number guesser
- Practice basic coding problems → Use platforms like JS.info or Frontend Masters
2. Start Easy LeetCode Problems (2-4 Weeks)
Once you're comfortable with JS syntax, start with Easy-level problems on LeetCode:
📌 Recommended Easy LeetCode Problems:
- Arrays → Two Sum, Merge Sorted Arrays
- Strings → Reverse String, Valid Anagram
- Hashmaps → Contains Duplicate
- Basic Recursion → Fibonacci, Factorial
👉 Action Plan:
- Use LeetCode’s Top Interview 150 (Easy)
- Watch solutions in JavaScript if stuck (YouTube, NeetCode, or LeetCode discussions)
- Understand problem patterns, don’t just memorize solutions
3. Slowly Move to Medium Problems & DSAs
Once you get comfortable, level up to Recursion, Stack, Queue, Linked Lists, Trees, Graphs, and Dynamic Programming (DP).
🛠 Your Roadmap to JavaScript Mastery:
1️⃣ Master JavaScript syntax first
2️⃣ Solve easy LeetCode problems in JavaScript
3️⃣ Learn Data Structures & Algorithms
4️⃣ Gradually move to Medium/Hard problems
If you're focusing on MERN this structured approach will help you build a strong foundation without wasting time.
🚀 Do you want a daily study plan for JavaScript + LeetCode? Let me know in the comments!
This content originally appeared on DEV Community and was authored by Pavan Awagan
Pavan Awagan | Sciencx (2025-03-01T04:31:00+00:00) Master JavaScript Before Diving into LeetCode. Retrieved from https://www.scien.cx/2025/03/01/master-javascript-before-diving-into-leetcode/
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