rashmi agar
4 posts
Mar 07, 2025
8:36 PM
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Hey JavaScript enthusiasts,
I recently came across the js copywithin method, which allows us to copy part of an array within itself. However, I’m a bit confused about its practical applications.
Here’s an example I found:
javascript
Copy
Edit
let arr = [1, 2, 3, 4, 5];
arr.copyWithin(0, 3, 5);
console.log(arr); // [4, 5, 3, 4, 5]
A few questions:
How does copyWithin() differ from splice()?
Does copyWithin() always modify the original array?
Can it be used for shifting elements efficiently?
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