README.md

JavaScript Polyfills for Interviews

This directory contains custom implementations (polyfills) of native JavaScript methods that are frequently asked in frontend interviews.

📂 Folder Structure

• Array Methods: map, filter, reduce.
• Function Methods: bind, call, apply.
• Promise Methods: all, allSettled.
• Object Methods: create.

🧠 Why Practice Polyfills?

1. Understand Under-the-Hood Mechanics: It proves you know how JS works, not just how to use it.
2. Prototype Mastery: You'll get comfortable with Function.prototype and Array.prototype.
3. Context & Scope: Implementing bind, call, and apply is the best way to master the this keyword.
4. Asynchronous Patterns: Coding Promise.all teaches you how to manage multiple async operations manually.

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Tip

Always try to implement these without looking at the code first, then compare with the versions provided here.