如何将链接列表显示为下拉选择?

WAI提供了多个使用 role=listbox 和 role=option . 这需要使用 aria-activedescendant 和 aria-selected 以获得更好的可访问性支持。

See Examples under section: 3.13 Listbox

对于样式,可以复制 style used by the user agent stylesheet.

尽管如此,将链接列表样式设置为下拉选择可能是一个坏主意,因为它可能导致 unpredictable change of context

我想你在找这样的东西?不使用Jquery和Bootstrap解决方案

Url下拉列表

<div class="dropdown">
  Select URL...
  <div class="dropdown-content">
   <ul class="like-select">
  <li><a href="https://en.wikipedia.org/wiki/Main_Page">Wikipedia</a></li>
  <li><a href="https://stackoverflow.com">Stack Overflow</a></li>
  <li><a href="http://www.echojs.com/">Echo Js</a></li>
</ul>
  </div>
</div>

CSS

.dropdown {
    position: relative;
    display: inline-block;
        padding: 10px;
       width:160px;

    border: 1px solid;
}
.dropdown:after{
  content: '\25BC';
  position: relative;
    font-size:14px;
   float:right;


}

.dropdown-content {
    display: none;
    position: absolute;
    background-color: #f9f9f9;
    width: inherit;
    box-shadow: 0px 8px 16px 0px rgba(0,0,0,0.2);
   top: 39px;
    left: 0;
    width: 100%;
    z-index: 1;
}
li a{
  text-decoration:none;
    color: black;
    padding:10px;
}
ul{
  padding:0;
  margin:0;
}
li{
      list-style: none;
    padding:10px;

  border-bottom:1px solid black;
}
li:hover{
  background-color:gray;

}
li:hover a{
    color:white;
}

JS公司

var dropdown = document.getElementsByClassName("dropdown");
var attribute;
var myFunction = function() {
attribute = this.getAttribute("data-target");
    var x = document.getElementById(attribute);
    if (x.style.display === "none") {
        x.style.display = "block";
    } else {
        x.style.display = "none";
    }

};
for (var i = 0; i < dropdown.length; i++) {
    dropdown[i].addEventListener('click', myFunction, false);
}

Working Fiddle

<option> 不接受嵌套的HTML元素。

你要做的是你的风格 <ul> <li> 让它看起来和感觉像一个本地下拉菜单。

下面是一个工作示例:

https://codepen.io/anon/pen/boxKRz

我只使用CSS制作了这个示例,希望这能帮助你

HTML:

<ul>
    <li id="box">Hover Me
        <ul>
          <li class="dropdown_item"><a href="http://thinkio.ca">111</a></li>
          <li class="dropdown_item"><a href="http://thinkio.ca">222</a></li>
        </ul>
    </li>
</ul>

CSS:

ul, li {
    list-style-type: none;
    margin: 0;
    padding:0;
    height:30px;
    line-height: 30px;
    width: 100px;
}
#box {
    border: 1px solid #bbb;
    display: inline-block;
    cursor:default;
}
ul li ul {
    display: none;
    position: absolute;
    top: 40px; /* change this value based on your browser */
    left: 10px;
}
ul li:hover>ul:last-child {
    display: block;
    width: 100px;
}
ul li ul li:hover {
    background-color:rgb(33,144,255);
    color:white;
    border: 1px solid #bbb;
}

https://codepen.io/zsydyc/pen/VMGGPv

所有的解决方案,只要CSS和悬停,都在手机上运行良好!!!关于手机上没有悬停的评论是不对的。。。悬停状态映射到手指点击,并在每个浏览器的每个移动操作系统上工作!通常情况下,默认行为已经做到了这一点,在某些情况下,您可以使其更适用于一些JS。。。

.checkhack {
  display: none;
}

#menu {
  display: none;
}

#menutoggle:checked + #menu {
  display: block;
}

<label for="menutoggle" class="checklabel">OPEN MENU</label>
<input id="menutoggle" class="checkhack" type="checkbox" />
<ul id="menu">
  <li><a href="#">Link 1</a></li>
  <li><a href="#">Link 2</a></li>
  <li><a href="#">Link 3</a></li>
</ul>

快速创建组合框的方法,无需使用ID选择器并保持HTML如上所述 链接: https://codepen.io/gabep/pen/KXJoEK

首先是CSS和JS

fist I style the UL:

   .like-select {
  height:21px;
  overflow:hidden;
  width:8%;
}

.like-select li{
  appearance: select;
color:red;
    border-left: 1px solid blue;
   border-right: 1px solid blue;
    list-style-type: none;
}

让第一个孩子成为你的盒子:

.like-select li:first-child {
    border: 1px solid blue;
}

将最后一个子项设置为下拉列表的底部:

 .like-select li:last-child {
        border-bottom: 1px solid blue;

    }

为列表项设置悬停效果:

.like-select li a:hover { 
  background-color: green !important;
}

.like-select li:first-child a:hover{ 
  background-color: none !important;
}

a {
  color:blue;
  text-decoration:none;
  width:100%;
}

现在Js:

    function load() {
  //add the main item to your list you need to have it in your drop-down: 

//使用queryselectoral查找任何类型的特定元素,并将其放入列表中

  var addfirst= document.querySelectorAll(".like-select li:first-child");
    var ullist = document.querySelectorAll(".like-select"); 
   ullist[0].innerHTML =  addfirst[0].outerHTML + ullist[0].innerHTML ;


   y = document.querySelectorAll(".like-select li");

  // do an onlick here instead of mouse over
   y[0].onmouseenter = function(){

     //resize wrapper event - im not going to do a toggle because you get the idea 
var comboboxwrapper = document.querySelectorAll(".like-select");
comboboxwrapper[0].style.height = "100px";
 }


// loop though all other items except first-child
var i;
    for (i = 1; i < y.length; i++) { 
 y[i].onmouseover = function(){

   var selecteditem =document.querySelectorAll(".like-select li");

//将值悬停在组合框中,更改其中的值

  var mainitem = document.querySelectorAll(".like-select li:first-child");


  mainitem[0].innerHTML = this.innerHTML;   

 };


 } }

window.onload = load;