Introduction

The toReversed() method in JavaScript is a modern array method that **returns a new array with the elements reversed**, without modifying the original array. 🔄 It is a safer alternative to reverse() when you want to preserve immutability.

📌 What is toReversed()?

Unlike reverse(), which modifies the original array in place, toReversed() creates a **new reversed array**, leaving the original unchanged. This makes it ideal for functional programming or scenarios where you want to avoid side effects.

💡 Syntax

array.toReversed()

🧵 Example: Basic Usage

const arr = [1, 2, 3, 4];
const reversedArr = arr.toReversed();

console.log(reversedArr); // [4, 3, 2, 1]
console.log(arr);         // [1, 2, 3, 4] (original array unchanged)

🔗 Example: Chaining with map()

const arr = [1, 2, 3, 4];
const result = arr.toReversed().map(x => x * 2);

console.log(result); // [8, 6, 4, 2]
console.log(arr);    // [1, 2, 3, 4]

🍏 Example: Using on Strings (via split)

const str = "hello";
const reversedStr = str.split("").toReversed().join("");

console.log(reversedStr); // "olleh"

⚠️ Important Notes

📊 Quick Reference Table

🔥 Summary

toReversed() is the modern, immutable alternative to reverse(). Use it whenever you want a reversed array **without affecting the original**, making your code safer and more predictable.