我从CodePen复制了一个水平选择菜单,这里是source code
结果如下:
var btn = document.querySelector("button")
var dropdown = document.querySelector(".dropdown-options")
var optionLinks = document.querySelectorAll(".option a")
console.log(optionLinks)
btn.addEventListener("click", function(e) {
e.preventDefault()
console.log("btn")
dropdown.classList.toggle("open")
});
var clickFn = function(e) {
e.preventDefault()
dropdown.classList.remove("open")
btn.innerHTML = this.text
var activeLink = document.querySelector(".option .active")
if (activeLink) {
activeLink.classList.remove("active")
}
this.classList.add("active")
}
for (var i = 0; i < optionLinks.length; i++) {
optionLinks[i].addEventListener("mousedown", clickFn, false)
}
&#13;
.container {
max-width: 500px;
margin-top: 10px;
margin-left: 0px;
}
.container button {
position: relative;
background: none;
border: none;
outline: none;
font-size: 16px;
border-bottom: 2px solid #9b9b9b;
padding-bottom: 8px;
min-width: 150px;
text-align: left;
outline: none;
cursor: pointer;
z-index: 2;
}
.container button:after {
content: '▾';
position: absolute;
right: 0px;
top: 0%;
color: rgb(142, 142, 142);
}
.container .dropdown {
position: relative;
}
.container .dropdown .dropdown-options {
list-style: none;
margin: 0;
padding: 0;
background: white;
box-shadow: 0 2px 4px rgba(0, 0, 0, 0.24);
display: inline-block;
position: absolute;
left: 0;
bottom: 0;
opacity: 0;
-webkit-transform: scale(0.8) translate3d(-20px, 0px, 0);
transform: scale(0.8) translate3d(-20px, 0px, 0);
-webkit-transition: opacity 0.1s cubic-bezier(0.5, 2, 0.5, 0.75), -webkit-transform 0.3s cubic-bezier(0.5, 2, 0.5, 0.75);
transition: opacity 0.1s cubic-bezier(0.5, 2, 0.5, 0.75), -webkit-transform 0.3s cubic-bezier(0.5, 2, 0.5, 0.75);
transition: opacity 0.1s cubic-bezier(0.5, 2, 0.5, 0.75), transform 0.3s cubic-bezier(0.5, 2, 0.5, 0.75);
transition: opacity 0.1s cubic-bezier(0.5, 2, 0.5, 0.75), transform 0.3s cubic-bezier(0.5, 2, 0.5, 0.75), -webkit-transform 0.3s cubic-bezier(0.5, 2, 0.5, 0.75);
-webkit-transform-origin: 0 100%;
transform-origin: 0 100%;
z-index: 1;
}
.container .dropdown .dropdown-options.open {
opacity: 1;
-webkit-transform: scale(1) translate3d(0, 0, 0);
transform: scale(1) translate3d(0, 0, 0);
z-index: 5;
}
.container .dropdown .dropdown-options li {
display: inline-block;
}
.container .dropdown .dropdown-options li a {
text-decoration: none;
display: inline-block;
padding: 10px 16px;
color: #2975DA;
}
.container .dropdown .dropdown-options li a:hover {
color: #2269c7;
}
.container .dropdown .dropdown-options li a.active {
border-bottom: 2px solid #9b9b9b;
color: #9b9b9b;
}
.container .dropdown .dropdown-options li a.active:hover {
color: #9b9b9b;
}
&#13;
<div class="container">
<div class="dropdown">
<button>Type</button>
<ul class="dropdown-options">
<li class="option">
<a href="#">A</a>
</li>
<li class="option">
<a href="#">B</a>
</li>
<li class="option">
<a href="#">C</a>
</li>
<li class="option">
<a href="#">D</a>
</li>
</ul>
</div>
</div>
&#13;
在提交此表单之前,我遇到了如何获取selected li
的问题。它不是<select>
我在表单中使用此菜单,是否有一种简单的方法可以使用li
获取JavaScript
的选定值?
答案 0 :(得分:1)
您可以使用解决方案https://jsfiddle.net/9Lk8vwvL/
var btn = document.querySelector("button")
var dropdown = document.querySelector(".dropdown-options")
var optionLinks = document.querySelectorAll(".option a")
btn.addEventListener("click", function(e) {
e.preventDefault()
dropdown.classList.toggle("open")
});
var clickFn = function(e) {
console.log(e.target.innerText);
e.preventDefault()
dropdown.classList.remove("open")
btn.innerHTML = this.text
var activeLink = document.querySelector(".option .active")
if (activeLink) {
activeLink.classList.remove("active")
}
this.classList.add("active")
}
for (var i = 0; i < optionLinks.length; i++) {
optionLinks[i].addEventListener("mousedown", clickFn, false)
}
.container {
max-width: 500px;
margin-top: 10px;
margin-left: 0px;
}
.container button {
position: relative;
background: none;
border: none;
outline: none;
font-size: 16px;
border-bottom: 2px solid #9b9b9b;
padding-bottom: 8px;
min-width: 150px;
text-align: left;
outline: none;
cursor: pointer;
z-index: 2;
}
.container button:after {
content: '▾';
position: absolute;
right: 0px;
top: 0%;
color: rgb(142, 142, 142);
}
.container .dropdown {
position: relative;
}
.container .dropdown .dropdown-options {
list-style: none;
margin: 0;
padding: 0;
background: white;
box-shadow: 0 2px 4px rgba(0, 0, 0, 0.24);
display: inline-block;
position: absolute;
left: 0;
bottom: 0;
opacity: 0;
-webkit-transform: scale(0.8) translate3d(-20px, 0px, 0);
transform: scale(0.8) translate3d(-20px, 0px, 0);
-webkit-transition: opacity 0.1s cubic-bezier(0.5, 2, 0.5, 0.75), -webkit-transform 0.3s cubic-bezier(0.5, 2, 0.5, 0.75);
transition: opacity 0.1s cubic-bezier(0.5, 2, 0.5, 0.75), -webkit-transform 0.3s cubic-bezier(0.5, 2, 0.5, 0.75);
transition: opacity 0.1s cubic-bezier(0.5, 2, 0.5, 0.75), transform 0.3s cubic-bezier(0.5, 2, 0.5, 0.75);
transition: opacity 0.1s cubic-bezier(0.5, 2, 0.5, 0.75), transform 0.3s cubic-bezier(0.5, 2, 0.5, 0.75), -webkit-transform 0.3s cubic-bezier(0.5, 2, 0.5, 0.75);
-webkit-transform-origin: 0 100%;
transform-origin: 0 100%;
z-index: 1;
}
.container .dropdown .dropdown-options.open {
opacity: 1;
-webkit-transform: scale(1) translate3d(0, 0, 0);
transform: scale(1) translate3d(0, 0, 0);
z-index: 5;
}
.container .dropdown .dropdown-options li {
display: inline-block;
}
.container .dropdown .dropdown-options li a {
text-decoration: none;
display: inline-block;
padding: 10px 16px;
color: #2975DA;
}
.container .dropdown .dropdown-options li a:hover {
color: #2269c7;
}
.container .dropdown .dropdown-options li a.active {
border-bottom: 2px solid #9b9b9b;
color: #9b9b9b;
}
.container .dropdown .dropdown-options li a.active:hover {
color: #9b9b9b;
}
<div class="container">
<div class="dropdown">
<button>Type</button>
<ul class="dropdown-options">
<li class="option">
<a href="#">A</a>
</li>
<li class="option">
<a href="#">B</a>
</li>
<li class="option">
<a href="#">C</a>
</li>
<li class="option">
<a href="#">D</a>
</li>
</ul>
</div>
</div>
由于您在clickFn
方法中有活动,因此可以使用console.log(e.target.innerText);
希望这可以帮助您获得所选的li
值。
答案 1 :(得分:1)
在clickFn
功能中,您已将所选链接设为button
innerHTML - btn.innerHTML = this.text;
button
的默认文字为Type
。您可以在表单提交期间检查按钮文本,如:
if (btn.innerText === "Type")
//Option not selected - Alert user
else
//Option selected - Validate other fields