Css Custom Combobox Issue
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
Solution 1:
Try this:
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;
}
ulli{
list-style: none;
cursor: pointer;
padding: 4px10px;
}
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><htmllang="en"><head><metacharset="UTF-8"><metaname="viewport"content="width=device-width, initial-scale=1.0"><title>Document</title><linkrel="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><buttononclick="showPop()">Pet</button></div><script>let ul = document.getElementsByTagName('ul')[0]
onload = function(){
ul.style.display = 'none'
}
functionshowPop(){
if(ul.style.display == 'none'){
ul.style.display = 'block'
}else{
ul.style.display = 'none'
}
}
</script></body></html>Solution 2:
Try to use position absolute for your list and set position relative for ul parent.
ul {
width: 100px;
background-color: rgb(224, 224, 224);
border-radius: 4px;
border: 1px solid black;
padding: 0;
margin: 0;
bottom: 40px;
left: 0;
position: absolute;
}
ulli {
list-style: none;
cursor: pointer;
padding: 4px10px;
}
li:hover {
background-color: white;
}
div {
width: 100%;
height: 40px;
position: relative;
background-color: bisque;
}
section {
height: 400px;
background-color: #525252;
}
button {
width: 100px;
height: 100%;
margin: 0;
}<!DOCTYPE html><htmllang="en"><head><metacharset="UTF-8"><metaname="viewport"content="width=device-width, initial-scale=1.0"><title>Document</title><linkrel="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><buttononclick="showPop()">Pet</button></div><script>let ul = document.getElementsByTagName('ul')[0]
onload = function() {
ul.style.display = 'none'
}
functionshowPop() {
if (ul.style.display == 'none') {
ul.style.display = 'block'
} else {
ul.style.display = 'none'
}
}
</script></body></html>Solution 3:
I have modified your CSS little bit. Please check the snippet.
let ul = document.getElementsByTagName('ul')[0]
onload = function(){
ul.style.display = 'none'
}
functionshowPop(){
if(ul.style.display == 'none'){
ul.style.display = 'block'
}else{
ul.style.display = 'none'
}
}ul{
width: 100px;
background-color: rgb(224, 224, 224);
border-radius: 4px;
border: 1px solid black;
padding: 0;
margin: 0;
position: absolute;
bottom: 40px;
}
ulli{
list-style: none;
cursor: pointer;
padding: 4px10px;
}
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;
position: relative;
display: inline-block;
}
.dropup{
position: relative;
display: inline-block;
}<scriptsrc="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script><section><p>Some content</p></section><divclass='dropup'><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><buttononclick="showPop()">Pet</button></div>
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