npm-helloworld-first1-package/index.js

this first NPM

let uniqueArr = [];
function removeArrayDuplicates(arr) {
  if (!Array.isArray(arr)) {
    arr = [];
  }
  let theSet = new Set(arr);
  let uniqueArr = [...theSet];
  return uniqueArr;
}

module.exports = removeArrayDuplicates;