Input Auto-complete doesn't work with label & value

i use below code to input auto-complete, Since i have multiple value so i added label to display but after adding label my auto-complete function doesn't do anything.
Can some one help me solve to this issue.

function autocomplete(inp, arr) {
                var currentFocus;
                inp.addEventListener("input", function (e) {
                    var a, b, i, val = this.value;
                    closeAllLists();
                    if (!val) {
                        return false;
                    }
                    currentFocus = -1;
                    a = document.createElement("DIV");
                    a.setAttribute("id", this.id + "autocomplete-list");
                    a.setAttribute("class", "autocomplete-items");
                    this.parentNode.appendChild(a);
                    for (i = 0; i < arr.length; i++) {
                        if (arr[i].substr(0, val.length).toUpperCase() === val.toUpperCase()) {
                            b = document.createElement("DIV");
                            b.innerHTML = "<strong>" + arr[i].substr(0, val.length) + "</strong>";
                            b.innerHTML += arr[i].substr(val.length);
                            b.innerHTML += "<input type='hidden' value='" + arr[i] + "'>";
                            b.addEventListener("click", function (e) {
                                inp.value = this.getElementsByTagName("input")[0].value;
                                closeAllLists();
                            });
                            a.appendChild(b);
                        }
                    }
                });
                inp.addEventListener("keydown", function (e) {
                    var x = document.getElementById(this.id + "autocomplete-list");
                    if (x)
                        x = x.getElementsByTagName("div");
                    if (e.keyCode === 40) {
                        currentFocus++;
                        addActive(x);
                    } else if (e.keyCode === 38) {
                        currentFocus--;
                        addActive(x);
                    } else if (e.keyCode === 13) {
                        e.preventDefault();
                        if (currentFocus > -1) {
                            if (x)
                                x[currentFocus].click();
                        }
                    }
                });
                function addActive(x) {
                    if (!x)
                        return false;
                    removeActive(x);
                    if (currentFocus >= x.length)
                        currentFocus = 0;
                    if (currentFocus < 0)
                        currentFocus = (x.length - 1);
                    x[currentFocus].classList.add("autocomplete-active");
                }
                function removeActive(x) {
                    for (var i = 0; i < x.length; i++) {
                        x[i].classList.remove("autocomplete-active");
                    }
                }
                function closeAllLists(elmnt) {
                    var x = document.getElementsByClassName("autocomplete-items");
                    for (var i = 0; i < x.length; i++) {
                        if (elmnt !== x[i] && elmnt !== inp) {
                            x[i].parentNode.removeChild(x[i]);
                        }
                    }
                }
                document.addEventListener("click", function (e) {
                    closeAllLists(e.target);
                });
            }
            var countries = ["Afghanistan", "Albania", "Algeria", "Andorra", "Angola",
 "Anguilla", "Antigua & Barbuda", "Argentina", "Armenia"];
            autocomplete(document.getElementById("myInput"), countries);

<div class="autocomplete" style="width:300px;">
                <input id="myInput" type="text" name="myCountry" placeholder="Country">
            </div>

So to make label i done this and it doesn't work
i changed

var countries = [{
                    "value": "Afghanistan, Pakistan",
                    "label": "Afghanistan"
                },
                {
                    "value": "Albania, Balkans",
                    "label": "Albania"
                }];

Note: i need to show label while typing and after selected because i need to store multiple input value.


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