input搜索框实时检索功能实现（超简单，核心原理请看思路即可）
https://blog.csdn.net/qq_39974331/article/details/80410032
点击查看链接！！！
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>模糊查询</title>
<script src="static/js/jQuery%20v1.9.1.js"></script>
<style>
*{
list-style: none;
padding:0;
margin:0;
}
div{
text-align: center;
padding-top:20px;
}
ul{
padding-top:20px;
width:30%;
margin:0 50% 0 35%;
}
li{
padding:3px;
border:1px solid silver;
box-shadow: 1px 1px;
}
</style>
</head>
<body>
<div>
<input type="text" id="txt">
<button type="button" id="btn">search</button>
<ul id="list">
</ul>
</div>
<script>
var oTxt = document.getElementById('txt');
var oBtn = document.getElementById('btn');
var oList = document.getElementById('list');
var fruits = ["桃子","苹果","梨子","香蕉","香瓜","葡萄","柠檬","橘子","草莓","草莓子","草拟吗","s","ssr"];
//点击事件
oBtn.addEventListener('click', function(){
var keyWord = oTxt.value;
// var fruitList = searchByIndexOf(keyWord,fruits);
console.log(fruitList);
var fruitList = searchByRegExp(keyWord, fruits);
renderFruits(fruitList);
}, false);
//回车查询
oTxt.addEventListener('keydown', function(e){
if(e.keyCode == 13){
var keyWord = oTxt.value;
// var fruitList = searchByIndexOf(keyWord,fruits);
var fruitList = searchByRegExp(keyWord, fruits);
renderFruits(fruitList);
}
}, false);
var cpLock = false;
$('#txt').on('compositionstart', function () {
cpLock = true;
console.log("不搜索")
});
$('#txt').on('compositionend', function () {
cpLock = false;
console.log("汉字搜索");
var keyWord = oTxt.value;
// var fruitList = searchByIndexOf(keyWord,fruits);
var fruitList = searchByRegExp(keyWord, fruits);
renderFruits(fruitList);
});
$('#txt').on('input', function () {
if (!cpLock) {
console.log("字母搜索")
var keyWord = oTxt.value;
// var fruitList = searchByIndexOf(keyWord,fruits);
var fruitList = searchByRegExp(keyWord, fruits);
renderFruits(fruitList);
}
});
function renderFruits(list){
if(!(list instanceof Array)){
return ;
}
oList.innerHTML = '';
var len = list.length;
var item = null;
for(var i=0;i<len;i++){
item = document.createElement('li');
item.innerHTML = list[i];
oList.appendChild(item);
}
}
//模糊匹配的时候如果不区分大小写，可以使用toLowerCase()或者toUpperCase()转换之后去匹配。
//模糊查询1:利用字符串的indexOf方法
function searchByIndexOf(keyWord, list){
if(!(list instanceof Array)){
return ;
}
var len = list.length;
var arr = [];
for(var i=0;i<len;i++){
//如果字符串中不包含目标字符会返回-1
if(list[i].indexOf(keyWord)>=0){
arr.push(list[i]);
}
}
return arr;
}
//正则匹配
function searchByRegExp(keyWord, list){
if(!(list instanceof Array)){
return ;
}
var len = list.length;
var arr = [];
var reg = new RegExp(keyWord);
for(var i=0;i<len;i++){
//如果字符串中不包含目标字符会返回-1
if(list[i].match(reg)){
arr.push(list[i]);
}
}
return arr;
}
renderFruits(fruits);
</script>
</body>
</html>
