What is the difference between `Array.prototype.copyWithin()` and `Array.prototype.fill()`?

Question

JavaScript Professional — Medium

What is the difference between `Array.prototype.copyWithin()` and `Array.prototype.fill()`?

Accepted Answer

Array.prototype.copyWithin() copies elements within the same array, while Array.prototype.fill() replaces elements with a static value in a range. Both methods mutate the original array, but copyWithin() moves elements while fill() sets them to a specific value.