Sometimes we need an optional drop-down box to select content, but there is also the need to customize input. For this requirement, most websites use a drop-down box and an input text, and give selections in parallel or branch. So, we want it to look like a drop-down box that can be entered or selected, so how do we do it?
In fact, we can simulate this effect through css positioning and a little javascript code.
The code copy is as follows:
<!DOCTYPE html>
<html>
<head>
<title>Editable and selectable drop-down box</title>
<meta charset="utf-8">
<style>
.list-name-input{
color: #333;
font-family: tahoma, 'Microsoft YaHei', 'Segoe UI', Arial, 'Microsoft Yahei', Simsun, sans-serif;
font-size: 15px;
font-weight: bold;
height: 50px;
margin: 0px;
padding: 0px;
position: relative;
width: 530px;
}
.list-name-for-select{
border: 0;
color: #555;
height: 20px;
lighting-color: rgb(255, 255, 255);
line-height: 20px;
margin:0 0 10px 0;
outline-color: #555;
outline-offset: 0px;
outline-style: none;
outline-width: 0px;
padding: 4px 6px;
position: absolute;
top: 1px;
left: 3px;
vertical-align: middle;
width: 486px;
}
.list-name-input-for-select:focus{
border: 0;
border-radius: 0;
}
.list-select{
background-color: #FFF;
border:1px #ccc solid;
border-radius: 4px;
color: #555;
cursor: pointer;
height: 30px;
left: 0px;
margin:0 0 10px 0;
padding: 4px 6px;
position: absolute;
top: 0px;
vertical-align: middle;
white-space: pre;
width: 530px;
}
</style>
</head>
<body>
<div id="list-name-input">
<select type="text" id="list-select">
<option value="">
New
</option>
<option value="0">
10-NGCFG-update-1000
</option>
<option value="1">
11-NGCFG-update-1000
</option>
<option value="2">
111
</option>
<option value="3">
12-NGCFG-update-1000
</option>
<option value="4">
13-NGCFG-update-1000
</option>
<option value="5">
14-NGCFG-update-1000
</option>
<option value="6">
15-NGCFG-update-1000
</option>
<option value="7">
16-NGCFG-update-1000
</option>
<option value="8">
17-NGCFG-update-1000
</option>
<option value="9">
18-NGCFG-update-1257
</option>
<option value="10">
2-NGCFG-update-100
</option>
<option value="11">
3-NGCFG-update-150
</option>
<option value="12">
4-NGCFG-update-200
</option>
<option value="13">
5-NGCG-update-250
</option>
<option value="14">
6-NGCFG-update-418
</option>
<option value="15">
7-NGCFG-update-500
</option>
<option value="16">
8-NGCFG-update-1000
</option>
<option value="17">
9-NGCFG-update-1000
</option>
<option value="18">
@ALL
</option>
<option value="19">
@CNC-BJ-4
</option>
<option value="20">
CNC-BJ--Test
</option>
<option value="21">
test
</option>
</select>
<input type="text" id="list-name-for-select">
</div>
<script>
var listName = document.getElementById('list-name-for-select');
var listSelect = document.getElementById('list-select').onchange = function(e){
console.log(this)
if(this.value){
listName.value = this.value + ' | ' + this.options[this.selectedIndex].text;
}else{
listName.value = ''
}
};
</script>
</body>
</html>