spread operator vs array.concat()

Question

What is the difference between spread operator and array.concat()

Answer 1

The one difference I think is valid is that using spread operator for large array size will give you error of Maximum call stack size exceeded which you can avoid using the concat operator.

var  someArray = new Array(600000);
var newArray = [];
var tempArray = [];


someArray.fill("foo");

try {
  newArray.push(...someArray);
} catch (e) {
  console.log("Using spread operator:", e.message)
}

tempArray = newArray.concat(someArray);
console.log("Using concat function:", tempArray.length)