How to extend an existing JavaScript array with another array, without creating a new array
In JavaScript, there are times when you want to extend an existing array with the contents of another array—without creating a brand-new array. This is useful when you need to preserve references to the original array, especially if other parts of your code are still using it. Here are a few reliable ways to do it:…
Answered Sep 11, 2025 · 545 Views Read answer →