CSS自定义组合框问题 [英] CSS Custom combobox issue
本文介绍了CSS自定义组合框问题的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
我需要一个自定义组合框.因此，我用 ul 实现了.问题是我无法通过单击 button 在顶部打开组合框列表.在显示 ul 时，它将 button 移至网页底部.
I need a custom combo box. So, I implemented with ul. The problem is I can't get combo box list opens on top by clicking the button. While showing ul, it moves button to bottom of the webpage.
代码:
ul{
width: 100px;
background-color: rgb(224, 224, 224);
border-radius: 4px;
border: 1px solid black;
padding: 0;
margin: 0;
}
ul li{
list-style: none;
cursor: pointer;
padding: 4px 10px;
}
li:hover{
background-color: white;
}
div{
width: 100%;
height: 40px;
background-color: bisque;
}
section{
height: 400px;
background-color: #525252;
}
button{
width: 100px;
height: 100%;
margin: 0;
} <!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
<link rel="stylesheet" href="style.css">
</head>
<body>
<section>
<p>Some content</p>
</section>
<div>
<ul>
<li>Parrot</li>
<li>Dog</li>
<li>Cat</li>
<li>Squirrel</li>
<li>Otter</li>
<li>Cow</li>
<li>Goat</li>
<li>Finch</li>
</ul>
<button onclick="showPop()">Pet</button>
</div>
<script>
let ul = document.getElementsByTagName('ul')[0]
onload = function(){
ul.style.display = 'none'
}
function showPop(){
if(ul.style.display == 'none'){
ul.style.display = 'block'
}else{
ul.style.display = 'none'
}
}
</script>
</body>
</html>在这里，我想将 ul 保留在 body.div 中.我只想使其弹出，就像带有自定义位置的组合框一样.请参考所附图片.
Here, I want to keep the ul inside the body.div. I just want to make it pop up like combo box with custom position. Please refer attached images.
当前设计:
我希望它是这样的:
如何使用CSS制作它?预先谢谢大家...
How can I make it with CSS? Thank you all in advance...
推荐答案
尝试一下:
ul{
width: 100px;
background-color: rgb(224, 224, 224);
border-radius: 4px;
border: 1px solid black;
padding: 0;
margin: 0;
position: absolute;
bottom: 40px;
z-index: 9;
}
ul li{
list-style: none;
cursor: pointer;
padding: 4px 10px;
}
li:hover{
background-color: white;
}
div{
width: 100%;
height: 40px;
background-color: bisque;
position: relative;
}
section{
height: 400px;
background-color: #525252;
}
button{
width: 100px;
height: 100%;
margin: 0;
}<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
<link rel="stylesheet" href="style.css">
</head>
<body>
<section>
<p>Some content</p>
</section>
<div>
<ul>
<li>Parrot</li>
<li>Dog</li>
<li>Cat</li>
<li>Squirrel</li>
<li>Otter</li>
<li>Cow</li>
<li>Goat</li>
<li>Finch</li>
</ul>
<button onclick="showPop()">Pet</button>
</div>
<script>
let ul = document.getElementsByTagName('ul')[0]
onload = function(){
ul.style.display = 'none'
}
function showPop(){
if(ul.style.display == 'none'){
ul.style.display = 'block'
}else{
ul.style.display = 'none'
}
}
</script>
</body>
</html>这篇关于CSS自定义组合框问题的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
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