搜索/过滤下拉列表Javascript

Question

我正在按照本指南创建 Search/Filter Dropdown 。

但是我有这个方法'Play()'，它返回一个名称数组（例如：

allNameMuseums()

我的JS代码：

array = ["Jack", "Paul", "George"]

我想用这些名称代替About，Base，Blog等...

Answer 1

您可以遍历返回的数组，并将名称作为锚点附加到下拉列表中，如：

document.addEventListener("DOMContentLoaded", function(event) {
  allNameMuseums().forEach(function(item){
     document.getElementById("myDropdown").innerHTML += '<a href="'+item+'">'+item+'</a>';
  })
});

注意：：在执行代码之前，将代码放入DOMContentLoaded事件监听器中，以确保所有DOM元素都已加载/

工作示例：

document.addEventListener("DOMContentLoaded", function(event) {
  allNameMuseums().forEach(function(item) {
    document.getElementById("myDropdown").innerHTML += '<a href="' + item + '">' + item + '</a>';
  })
});


function myFunction() {
  document.getElementById("myDropdown").classList.toggle("show");
}

function filterFunction() {
  var input, filter, ul, li, a, i;
  input = document.getElementById("myInput");
  filter = input.value.toUpperCase();
  div = document.getElementById("myDropdown");
  a = div.getElementsByTagName("a");
  for (i = 0; i < a.length; i++) {
    if (a[i].innerHTML.toUpperCase().indexOf(filter) > -1) {
      a[i].style.display = "";
    } else {
      a[i].style.display = "none";
    }
  }
}

function allNameMuseums() {
  return ["Jack", "Paul", "George"];
}

.dropbtn {
  background-color: #4CAF50;
  color: white;
  padding: 16px;
  font-size: 16px;
  border: none;
  cursor: pointer;
}

.dropbtn:hover,
.dropbtn:focus {
  background-color: #3e8e41;
}

#myInput {
  border-box: box-sizing;
  background-image: url('searchicon.png');
  background-position: 14px 12px;
  background-repeat: no-repeat;
  font-size: 16px;
  padding: 14px 20px 12px 45px;
  border: none;
  border-bottom: 1px solid #ddd;
}

#myInput:focus {
  outline: 3px solid #ddd;
}

.dropdown {
  position: relative;
  display: inline-block;
}

.dropdown-content {
  display: none;
  position: absolute;
  background-color: #f6f6f6;
  min-width: 230px;
  overflow: auto;
  border: 1px solid #ddd;
  z-index: 1;
}

.dropdown-content a {
  color: black;
  padding: 12px 16px;
  text-decoration: none;
  display: block;
}

.dropdown a:hover {
  background-color: #ddd;
}

.show {
  display: block;
}

<h2>Search/Filter Dropdown</h2>
<p>Click on the button to open the dropdown menu, and use the input field to search for a specific dropdown link.</p>

<div class="dropdown">
  <button onclick="myFunction()" class="dropbtn">Dropdown</button>
  <div id="myDropdown" class="dropdown-content">
    <input type="text" placeholder="Search.." id="myInput" onkeyup="filterFunction()">
  </div>
</div>