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<div class="row">
<div class="left" style="background-color:#bbb;">
<h2>菜单</h2>
<input type="text" id="mySearch" onkeyup="myFunction()" placeholder="搜索.." title="输入分类">
<ul id="myMenu">
<li><a href="#">HTML</a></li>
<li><a href="#">CSS</a></li>
<li><a href="#">JavaScript</a></li>
<li><a href="#">PHP</a></li>
<li><a href="#">Python</a></li>
<li><a href="#">jQuery</a></li>
<li><a href="#">SQL</a></li>
<li><a href="#">Bootstrap</a></li>
<li><a href="#">Node.js</a></li>
<li><a href="#">中文分类</a></li>
</ul>
</div>
<div class="right" style="background-color:#ddd;">
<h2>内容</h2>
<p>在搜索框输入菜单列表的分类名搜索对应内容。</p>
<p>Some text..Some text..Some text..Some text..Some text..Some text..Some text..Some text..</p>
<p>Some other text..Some text..Some text..Some text..Some text..Some text..Some text..Some text..</p>
<p>Some text..</p>
xxxxxxxxxx
function myFunction() {
var input, filter, ul, li, a, i;
input = document.getElementById("mySearch");
filter = input.value.toUpperCase();
ul = document.getElementById("myMenu");
li = ul.getElementsByTagName("li");
for (i = 0; i < li.length; i++) {
a = li[i].getElementsByTagName("a")[0];
if (a.innerHTML.toUpperCase().indexOf(filter) > -1) {
li[i].style.display = "";
} else {
li[i].style.display = "none";
}
body {
font-family: Arial, Helvetica, sans-serif;
* {
box-sizing: border-box;
/* Create a column layout with Flexbox */
.row {
display: flex;
/* Left column (menu) */
.left {
flex: 35%;
padding: 15px 0;
.left h2 {
padding-left: 8px;
/* 右侧(内容) */
.right {
flex: 65%;
padding: 15px;
/* 搜索框 */
#mySearch {
width: 100%;
font-size: 18px;
padding: 11px;
border:1px solid #ddd;
/* 左侧导航 */
#myMenu {
list-style-type: none;
padding: 0;
margin: 0;
#myMenu li a {
backgrxound-color: #f6f6f6;
padding: 12px;
text-decoration: none;
color: black;
display: block
#myMenu li a:hover {
background-color: #eee;