Frontend

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Dropdown Search</title>
  <style>
    #myInput {
      padding: 10px;
    }
    .dropdown-content {
      display: none;
      position: absolute;
      background-color: #f9f9f9;
      min-width: 160px;
      box-shadow: 0px 8px 16px 0px rgba(0,0,0,0.2);
      z-index: 1;
    }
    .dropdown-content li {
      padding: 12px 16px;
      text-decoration: none;
      display: block;
      cursor: pointer;
    }
  </style>
</head>
<body>
<div class="dropdown">
  <input type="text" id="myInput" oninput="filterFunction()" placeholder="Type to search...">
  <ul id="myDropdown" class="dropdown-content" onclick="selectOption()"></ul>
</div>
<script>
// Sample array of options
var optionsArray = ["Apple", "Orange", "Banana", /* Add your 170 options here */];
// Function to create list items from the array
function populateDropdown() {
  var dropdown = document.getElementById("myDropdown");
  dropdown.innerHTML = ""; // Clear previous content
  for (var i = 0; i < optionsArray.length; i++) {
    var listItem = document.createElement("li");
    listItem.textContent = optionsArray[i];
    dropdown.appendChild(listItem);
  }
}
function filterFunction() {
  var input, filter, dropdown, options, i;
  input = document.getElementById("myInput");
  filter = input.value.toUpperCase();
  dropdown = document.getElementById("myDropdown");
  options = dropdown.getElementsByTagName("li");
  if (filter === "") {
    dropdown.style.display = "none";
    return;
  }
  for (i = 0; i < options.length; i++) {
    var optionText = options[i].textContent.toUpperCase();
    if (optionText.startsWith(filter)) {
      options[i].style.display = "";
    } else {
      options[i].style.display = "none";
    }
  }
  dropdown.style.display = "block";
}
function selectOption() {
  var input = document.getElementById("myInput");
  var dropdown = document.getElementById("myDropdown");
  if (event.target.tagName === 'LI') {
    input.value = event.target.textContent;
    dropdown.style.display = "none";
  }
}
// Initial population of the dropdown
populateDropdown();
</script>
</body>
</html>