How to clear an array of duplicate elements?

Question

JavaScript

Essence of the question. Write a function that takes an array and returns an array with elements that are not repeated. An array can be made up of numbers, strings, and booleans. The speed of the function should be no more than O(n) .
Result. I pass [2, 5, 8, 2, true, 5, 2] to the function and get [8, true] .

Answer 1

Array
  .from(arr.reduce((acc, n) => acc.set(n, (acc.get(n) ?? 0) + 1), new Map))
  .filter(n => n[1] === 1)
  .map(n => n[0])

Answer 2

new Set?