text: function addItem() {
    let newText = document.getElementById("newItemText").value;
    let newValue = document.getElementById("newItemValue").value;
  
    let option = document.createElement("option");
    option.text = newText;
    option.value = newValue;
  
    let manu = document.getElementById("menu");
    if (newText !== "" && newValue !== '') {
      manu.appendChild(option);
    }
  
    
    newText = document.getElementById("newItemText").value = "";
    newValue = document.getElementById("newItemValue").value = "";
  }
  