CODE EXAMPLE FOR JAVASCRIPT

duplicates array js

let arr = [1, 2, 3, 4, 3, 3, 3]

console.log([...new Set(arr)])
// (4) [1, 2, 3, 4]

let arr = [1, 2, 3, 4, 3, 3, 3, 'foo', true]

console.log([...new Set(arr)])
//(6) [1, 2, 3, 4, 'foo', true]