What Is The Purpose Of Calling Array.prototype.slice Against A NodeList?

I was looking up how to iterate NodeLists and I came across the following bit of code. var nodesArray = Array.prototype.slice.call(nodeList); nodesArray.forEach(function(node) {

Solution 1:

Iterate a NodeList using forEach method

But I don't understand why we used the slice method ?

You don't have to, you could do this directly

Array.prototype.forEach.call(nodelist, function(value, index) {
    ...
});

Solution 2:

All these answers are outdated. Actually you can use forEach on NodeList in modern browsers!

So just use forEach!

Solution 3:

Because slice returns a copy of any array-like argument as a new array object, which is exactly what we need. We could just as easily use concat.