<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Document</title>
<link rel="stylesheet" href="less/index.css">
<style>
.select_text{
width:30%;
height: 20px;
padding: 8px;
border-radius: 5px;
color: grey;
}
.select_text:focus{
border-color: green;
box-shadow: 0px 0 5px grey;
}
.select_span{
position: relative;
left: -2%;
cursor: pointer;
}
.select_ul{
display: none;
width: 27%;
padding: 25px;
margin: 0;
height: 25vh;
border: 1px solid grey;
overflow: auto;
}
.select_li:hover{
background: green;
}
</style>
</head>
<body>
<div id="select_container">
</div>
<script>
function select_search(id,arr){
var container = document.getElementById(id)
var hidden = document.createElement(‘input‘)
hidden.setAttribute(‘type‘,‘hidden‘)
var text = document.createElement(‘input‘)
text.setAttribute(‘type‘,‘text‘)
text.setAttribute(‘class‘,‘select_text‘)
var span = document.createElement(‘span‘)
span.setAttribute(‘class‘,‘select_span‘)
span.innerHTML = ‘O‘
var ul = document.createElement(‘ul‘)
ul.setAttribute(‘class‘,‘select_ul‘)
container.appendChild(hidden)
container.appendChild(text)
container.appendChild(span)
container.appendChild(ul)
function getValue(arr){
var lis = ‘‘
for(var i=0;i<arr.length;i++){
lis += ‘<li class="select_li">‘+arr[i].name+‘</li>‘
}
ul.innerHTML = lis
}
function searchValue(str,arr){
var retArray = new Array()
if(str==‘‘){
retArray = arr
}else{
retArray = arr.filter(function(item){
var check = item.name.indexOf(str)
if(check!=-1){
return item
}
})
}
return retArray
}
function chooseValue(ele){
for(var i=0;i<ele.length;i++){
var prop = ele[i].getAttribute(‘class‘)
if(prop.indexOf(‘select_li‘)!=-1){
ele[i].onclick = function(){
var val = this.innerHTML
text.value = val
}
}
}
}
function removeHide(){
ul.style.display = ‘block‘
}
function getHide(){
ul.style.display = ‘none‘
}
function triggerHide(){
var all = document.getElementsByTagName(‘*‘)
var arr = new Array(‘select_text‘,‘select_span‘,‘select_ul‘,‘select_li‘)
for(var i=0;i<all.length;i++){
all[i].onclick = function(e){
e.stopPropagation()
e.preventDefault()
var prop = this.getAttribute(‘class‘)
var flag = false
if(prop){
for(var j in arr){
var item = arr[j]
if(prop.indexOf(item)!=-1){
flag = true
break
}
}
}
if(!flag){
getHide()
}else{
removeHide()
}
}
}
}
triggerHide()
text.onfocus = function(){
removeHide()
var val = this.value
var valArray = searchValue(val,arr)
getValue(valArray)
lis = document.getElementsByTagName(‘li‘)
chooseValue(lis)
}
text.onkeyup = function(){
var val = this.value
var valArray = searchValue(val,arr)
getValue(valArray)
lis = document.getElementsByTagName(‘li‘)
chooseValue(lis)
}
span.onclick = function(e){
var val = text.value
var valArray = searchValue(val,arr)
getValue(valArray)
lis = document.getElementsByTagName(‘li‘)
chooseValue(lis)
e.stopPropagation()
e.preventDefault()
var style = ul.style.display
if(style==‘block‘){
getHide()
}else{
removeHide()
}
}
}
var arr = new Array(
{
id:1,
name:‘a‘
},
{
id:2,
name:‘b‘
},
{
id:3,
name:‘c‘
},
{
id:4,
name:‘aa‘
},
{
id:5,
name:‘bb‘
},
{
id:6,
name:‘cc‘
}
)
select_search(‘select_container‘,arr)
</script>
</body>
</html>
原文地址：http://blog.51cto.com/12173069/2107926
