how to filter unique numbers from array js code example

Example 1: javascript array unique values

var arr = [55, 44, 65,1,2,3,3,34,5];
var unique = [...new Set(arr)]

//just  var unique = new Set(arr) wont be an array

Example 2: javascript get unique values from key

const unique = [...new Set(array.map(item => item.age))];