Modern Unique Array

// get unique list from array of object
const data = [
  { group: 'A', name: 'SD' },
  { group: 'B', name: 'FI' },
  { group: 'A', name: 'MM' },
  { group: 'B', name: 'CO' }
]
const unique = [...new Set(data.map((item) => item.group))] // [ 'A', 'B']

// get unique item of object from array of object
// For those who want to return object with all properties unique by key
const array = [
  { name: 'Joe', age: 17 },
  { name: 'Bob', age: 17 },
  { name: 'Carl', age: 35 }
]
const key = 'age'
const arrayUniqueByKey = [...new Map(array.map((item) => [item[key], item])).values()]
/*OUTPUT
  [
    { "name": "Bob", "age": 17 },
    { "name": "Carl", "age": 35 }
  ]
*/