text: function autocomplete(inp, arr) {
    /*the autocomplete function takes two arguments,
    the text field element and an array of possible autocompleted values:*/
    let currentFocus;
    /*execute a function when someone writes in the text field:*/
    inp.addEventListener('input', function(e) {
        let a, b, i, val = this.value;
        /*close any already open lists of autocompleted values*/
        closeAllLists();
        if (!val) { return false;}
        currentFocus = -1;
        /*create a DIV element that will contain the items (values):*/
        a = document.createElement("DIV");
        a.setAttribute('id', `${this.id}autocomplete-list`);
        a.setAttribute('class', 'autocomplete-items');
        /*append the DIV element as a child of the autocomplete container:*/
        this.parentNode.appendChild(a);
        /*for each item in the array...*/
        for (i = 0; i < arr.length; i++) {
          /*check if the item starts with the same letters as the text field value:*/
          // if (arr[i].substr(0, val.length).toUpperCase() == val.toUpperCase()) {
          if (arr[i].toUpperCase().includes(val.toUpperCase())) {          
            /*create a DIV element for each matching element:*/
            b = document.createElement('DIV');
            /*make the matching letters bold:*/
            const pos = arr[i].toUpperCase().indexOf(val.toUpperCase())
            if (pos == 0) {
              b.innerHTML = `<strong>${arr[i].substr(0, val.length)}</strong>`;
              b.innerHTML += arr[i].substr(val.length);
            } else {
              b.innerHTML = arr[i].slice(0, pos);
              b.innerHTML += `<strong>${arr[i].substr(pos, val.length)}</strong>`;
              b.innerHTML += arr[i].substr(pos + val.length);
            }
            // b.innerHTML = "<strong>" + arr[i].substr(0, val.length) + "</strong>";
            // b.innerHTML += arr[i].substr(val.length);
            /*insert a input field that will hold the current array item's value:*/
            b.innerHTML += `<input type="hidden" value="${arr[i]}">`;
            /*execute a function when someone clicks on the item value (DIV element):*/
                b.addEventListener('click', function(e) {
                /*insert the value for the autocomplete text field:*/
                inp.value = this.getElementsByTagName('input')[0].value;
                /*close the list of autocompleted values,
                (or any other open lists of autocompleted values:*/
                closeAllLists();
            });
            a.appendChild(b);
          }
        }
    });
    /*execute a function presses a key on the keyboard:*/
    inp.addEventListener('keydown', function(e) {
        let x = document.getElementById(`${this.id}autocomplete-list`);
        if (x) x = x.getElementsByTagName("div");
        if (e.keyCode == 40) {
          /*If the arrow DOWN key is pressed,
          increase the currentFocus variable:*/
          currentFocus++;
          /*and and make the current item more visible:*/
          addActive(x);
        } else if (e.keyCode == 38) { //up
          /*If the arrow UP key is pressed,
          decrease the currentFocus variable:*/
          currentFocus--;
          /*and and make the current item more visible:*/
          addActive(x);
        } else if (e.keyCode == 13) {
          /*If the ENTER key is pressed, prevent the form from being submitted,*/
          e.preventDefault();
          if (currentFocus > -1) {
            /*and simulate a click on the "active" item:*/
            if (x) x[currentFocus].click();
          }
        }
    });
    function addActive(x) {
      /*a function to classify an item as "active":*/
      if (!x) return false;
      /*start by removing the "active" class on all items:*/
      removeActive(x);
      if (currentFocus >= x.length) currentFocus = 0;
      if (currentFocus < 0) currentFocus = (x.length - 1);
      /*add class "autocomplete-active":*/
      x[currentFocus].classList.add('autocomplete-active');
    }
    function removeActive(x) {
      /*a function to remove the "active" class from all autocomplete items:*/
      for (let i = 0; i < x.length; i++) {
        x[i].classList.remove('autocomplete-active');
      }
    }
    function closeAllLists(elmnt) {
      /*close all autocomplete lists in the document,
      except the one passed as an argument:*/
      let x = document.getElementsByClassName('autocomplete-items');
      for (let i = 0; i < x.length; i++) {
        if (elmnt != x[i] && elmnt != inp) {
        x[i].parentNode.removeChild(x[i]);
        }
      }
    }
    /*execute a function when someone clicks in the document:*/
    document.addEventListener('click', function (e) {
        closeAllLists(e.target);
    });
  }