how to create set from array in javascript code example

Example 1: array to set javascript

const myArray = [1,2,3,1,5,8,1,2,9,4];
const unique = [...new Set(myArray)]; // [1, 2, 3, 5, 8, 9, 4]

const myString = ["a","b","c","a","d","b"];
const uniqueString = [...new Set(myString)]; //["a", "b", "c", "d"]

Example 2: create set from list javascript

var arr = [55, 44, 65];
var set = new Set(arr);

Example 3: js new array from new set

return Array.from(new Set(this.posts.map(e => e.category)))