Copy an Array with the Spread Operator
What is the use of splice () in JavaScript? The splice() method is used to add or remove elements of an existing array and the return value will be the removed items from the array. If nothing was removed from the array, then the return value will just be an empty array.
What is the spread operator in ES6? JavaScript ES6 (ECMAScript 6) introduced the spread operator. The syntax is three dots(...) followed by the array (or iterable*). It expands the array into individual elements. So, it can be used to expand the array in a places where zero or more elements are expected.