Shopping List JS Fundamentals

function shoppingList(arr) {
    let initialList = arr.shift().split('!');
    let lastCommand = arr.pop();

    for (let i = 0; i < arr.length; i++) {
      let commands = arr[i].split(' ');
      let command = commands[0];
      let product = commands[1];
      let productNewName = commands[2];

      if (command === 'Urgent') {
        if (!initialList.includes(product)) {
          initialList.unshift(product);
        }
      }
      if (command === 'Unnecessary') {
        if (initialList.includes(product)) {
          let index = initialList.indexOf(product);
          initialList.splice(index, 1);
        }
      }
      if (command === 'Correct') {
        if (initialList.includes(product)) {
          let index = initialList.indexOf(product);
          initialList[index] = productNewName;
        }
      }
      if (command === 'Rearrange') {
        if (initialList.includes(product)) {
          let index = initialList.indexOf(product);
          initialList.splice(index, 1);
          initialList.push(product);
        }
      }
    }
      console.log(initialList.join(', '));
  }