How to Replace an Item in a Javascript Array

Array operations are very common when coding in Javascript, and since the introduction of es6 and going forward, we have multiple ways of achieving the required results. So how do we replace an item in Array with Javascript?

We can use two approaches, the mutable, Array.splice() approach, or the immutable, Array.splice() with the spread operator approach. Choosing between the two approaches depends on the context and the environment you’re working in.