JSFiddle - React, Tailwind, and code Playground

HTML

<div id="output">
  loading...
</div>

JavaScript

function unique(arr) {
  let u = {};
  return arr.filter((v) => {
    return u[v] = !u.hasOwnProperty(v);
  });
};

let arr1 = [1, 4, 6, 4, 1, 2]
let arr2 = ["apple", "orange", 4, "", "apple", 1, 2, 3, 4, 5, "", "", "car"]

$('#output').html(JSON.stringify({
	arr1: unique(arr1),
  arr2: unique(arr2),
}))