A simple and clean method to remove all duplicates in a given array.
We will be using a
set, introduced in ES6. It’s a data structure with data that cannot be repeated. If we would have an array like this:
const list = [1, 2, 2, 3];
We could easily remove the duplicates by combining the set syntax with the array syntax, combined with the spread operator.
const listWithoutDuplicates = [...newSet(list)]; // [1, 2, 3]
This basically creates a unique set with the given array, and uses the spread operator
... as well as the square brackets
 to create a new array from that set. Easy and clean.