JS实例
1、跑马灯
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
</head>
<body>
<div id="i1" style="background-color: #74086e;color: #ccdcef;font-size: 55px;text-align: center">欢迎 X X X 莅临指导</div>
<script type="text/javascript">
setInterval(function(){
d1 = document.getElementById('i1'); //用DOM获取标签
d1_text = d1.innerText; //获取标签内的文本
first_char = d1_text[0]; //字符串索引
sub_char = d1_text.slice(1,d1_text.length); //字符串切片 d1_text.length获取文本长度
new_str = sub_char + first_char; //字符串拼接
d1.innerText = new_str;
},500)
</script>
</body>
</html>
2、模态对话框
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
<style>
.hide{
display: none;
}
.c1{
position: fixed;
top:0;
bottom: 0;
left:0;
right: 0;
background: rgba(0,0,0,.5);
z-index: 2;
}
.c2{
background-color: white;
position: fixed;
400px;
height: 300px;
top:50%;
left: 50%;
z-index: 3;
margin-top: -150px;
margin-left: -200px;
}
</style>
</head>
<body>
<div>
<table>
<tr>
<td>1</td>
<td>2</td>
<td><input type="button" value="点我" onclick="Show();"></td>
</tr>
</table>
</div>
<div id="shade" class="c1 hide"></div>
<div id="modal" class="c2 hide">
<p>用户：<input type="text" /></p>
<p>密码：<input type="password" /></p>
<p>
<input type="button" value="确定">
<input type="button" value="取消" onclick="Hide();">
</p>
</div>
<script>
function Show(){
document.getElementById('shade').classList.remove('hide');
document.getElementById('modal').classList.remove('hide');
}
function Hide(){
document.getElementById('shade').classList.remove('hide');
document.getElementById('modal').classList.remove('hide');
}
</script>
</body>
</html>
3、 折叠菜单
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
<style>
ul{
padding: 0;
margin: 0;
}
.hide{
display: none;
}
.menu{
200px;
height: 500px;
background-color: #2459a2;
border: 2px solid #333;
}
.menu .title{
background-color: brown;
cursor: pointer;
}
.menu .content{
background-color: white;
}
</style>
</head>
<body>
<div class="menu">
<div class="item">
<div class="title" onclick="Show(this);">菜单一</div>
<div class="content">
<ul>
<li>内容1</li>
<li>内容1</li>
<li>内容1</li>
</ul>
</div>
</div>
<div class="item">
<!--arg.下一个标签nex-->
<div class="title" onclick="Show(this);">菜单二</div>
<div class="content hide">
<ul>
<li>内容2</li>
<li>内容2</li>
<li>内容2</li>
</ul>
</div>
</div>
<div class="item">
<div class="title" onclick="Show(this);">菜单三</div>
<div class="content hide">
<ul>
<li>内容3</li>
<li>内容3</li>
<li>内容3</li>
</ul>
</div>
</div>
<div class="item">
<div class="title" onclick="Show(this);">菜单四</div>
<div class="content hide">
<ul>
<li>内容4</li>
<li>内容4</li>
<li>内容4</li>
</ul>
</div>
</div>
</div>
<script>
function Func(arg,a2){
console.log(arg,a2);
}
function Func1(arg){
console.log(arg);
}
function Show(arg){
//arg当前菜单
//console.log(arg);
arg.nextElementSibling.classList.remove('hide');
var father = arg.parentElement;
var sons = father.parentElement.children;
for (var i=0;i<sons.length;i++){
var current_ele = sons[i];
if(current_ele == father){
}else{
current_ele.children[1].classList.add('hide');
}
}
}
</script>
</body>
</html>
4、搜索框
输入框内含文字，鼠标点击后文字消失。
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
<style>
.gg{
color: gray;
}
.bb{
color: black;
}
</style>
</head>
<body>
<!--<!–<input type="text" placeholder="请输入内容" />–> /*下面代码实现这个功能*/-->
<input type="text" class="gg" value="请输入内容" onfocus="Focus(this);" onblur="Blur(this);" />
<script>
function Focus(ths){
//查找
ths.className = "bb";
var current_val = ths.value;
if(current_val == "请输入内容"){
ths.value = "";
}
}
function Blur(ths){
var current_val = ths.value;
if(current_val=='请输入内容' || current_val.trim().length == 0){
ths.value = '请输入内容';
ths.className = 'gg';
}
}
</script>
</body>
</html>
5、 选择栏
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
</head>
<body>
<div>
<input type="button" value="全选" ondblclick="CheckAll();"/>
<input type="button" value="取消" ondblclick="CancleAll();"/>
<input type="button" value="反选" onclick="ReverseAll();"/>
</div>
<table>
<thead>
<tr>
<th>序号</th>
<th>用户号</th>
<th>年龄</th>
</tr>
</thead>
<tbody id="tb">
<tr>
<td><input class="c1" type="checkbox" /></td>
<td>alex</td>
<td>19</td>
</tr>
<tr>
<td><input class="c1" type="checkbox" /></td>
<td>alex</td>
<td>19</td>
</tr>
<tr>
<td><input class="c1" type="checkbox" /></td>
<td>alex</td>
<td>19</td>
</tr>
<tr>
<td><input class="c1" type="checkbox" /></td>
<td>alex</td>
<td>19</td>
</tr>
</tbody>
</table>
<script>
function CheckAll(){
var tb = document.getElementById('tb');
var checks = tb.getElementsByClassName('c1');
for(var i=0;i<checks.length;i++){
var current_check = checks[i];
current_check.checked = true;
}
}
function CancleAll(){
var tb = document.getElementById('tb');
var checks = tb.getElementsByClassName('c1');
for(var i=0;i<checks.length;i++){
var current_check = checks[i];
current_check.checked = false;
}
}
function ReverseAll(){
var tb = document.getElementById('tb');
var checks = tb.getElementsByClassName('c1');
for(var i=0;i<checks.length;i++){
var current_check = checks[i];
if (current_check.checked){
current_check.checked = false;
}else{
current_check.checked = true;
}
}
}
</script>
</body>
</html>
效果：
&
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
</head>
<body>
<ul>
<li><input type="radio" name="g" value="11" />男</li>
<li><input type="radio" name="g" value="11" />女</li>
<li><input type="radio" name="g" value="11" />中</li>
</ul>
<script>
var radios = document.getElementsByTagName('input');
// radios[1].value
</script>
</body>
</html>
效果：
6、点击
点击后更换内容
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
</head>
<body>
<input type="button" onclick="Func();" value="点我" />
<div id="i1">
<div class="c1">123</div>
<div class="c1">123</div>
<div class="c1" alex="sb">123</div>
<div class="c1">123</div>
<div class="c1" alex="sb">123</div>
<div class="c1">123</div>
<div class="c1" alex="sb">123</div>
<div class="c1">123</div>
<div class="c1" alex="sb">123</div>
<div class="c1">123</div>
</div>
<script>
function Func(){
var i1 = document.getElementById('i1');
var divs = i1.children;
for (var i=0;i<divs.length;i++){
var current_div = divs[i];
var result = current_div.getAttribute('alex');
if(result == "sb"){
current_div.innerText = "456"
}
}
}
</script>
</body>
</html>
7、菜单
点击一个菜单显示菜单下的内容
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
<style>
ul{
list-style: none;
padding: 0;
margin: 0;
}
ul li{
float: left;
background-color: #2459a2;
color: white;
padding: 8px 10px;
}
.clearfix:after{
display: block;
content: '.';
height: 0;
visibility: hidden;
clear: both;
}
.hide{
display: none;
}
.tab-menu .title{
background-color: #dddddd;
}
.tab-menu .title .active{
background-color: white;
color: black;
}
.tab-menu .content{
border: 1px solid #dddddd;
min-height: 150px;
}
</style>
</head>
<body>
<div style=" 400px;margin: 0 auto">
<div class="tab-menu">
<div class="title clearfix">
<ul>
<li target="h1" class="active" onclick="Show(this);">价格趋势</li>
<li target="h3" class="active" onclick="Show(this);">市场分布</li>
<li target="h2" class="active" onclick="Show(this);">其他</li>
</ul>
</div>
<div id="content" class="content">
<div con="h1">content1</div>
<div con="h2" class="hide">content2</div>
<div con="h3" class="hide">content3</div>
</div>
</div>
</div>
<script>
function Show(ths) {
//ths 表示当前标签
var target = ths.getAttribute('target');
//给自己添加样式active
//兄弟样式去掉
ths.className = 'active';
var brothers = ths.parentElement.children;
for(var i=0;i<brothers.length;i++){
if(ths == brothers[i]){
}else{
brothers[i].removeAttribute('class');
}
}
//操作内容
var contents = document.getElementById('content').children;
for(var j=0;j<contents.length;j++){
var current_content = contents[j];
var con = current_content.getAttribute('con');
if(con == target){
current_content.classList.remove('hide');
}else{
current_content.className = "hide";
}
}
}
</script>
</body>
</html>
效果显示：
8、多选、单选
点击多个选择栏
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
</head>
<body>
<!--<input id="i1" type="text" value="123"/>-->
<!--<input id="i2" type="password" value="111" />-->
<!--<textarea id="i3">666</textarea>-->
<h1>爱好</h1>
<div id="i1">
<ul>
<li> <input type="checkbox" value="1" /> 篮球 </li>
<li> <input type="checkbox" value="2"/> 足球 </li>
<li> <input type="checkbox" value="3"/> 去球 </li>
</ul>
</div>
<div id="i2">
<ul>
<li> <input type="checkbox" value="11" /> 篮球 </li>
<li> <input type="checkbox" value="22"/> 足球 </li>
<li> <input type="checkbox" value="33"/> 去球 </li>
</ul>
</div>
<select id="ii">
<option value="11">上海</option>
<option value="22">北京</option>
</select>
<script>
</script>
</body>
</html>
效果：
9、输入框
输入框内输入内容可以写入文本中
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
</head>
<body>
<div>
<div>
<input type="text" />
<input type="button" value="添加" onclick="AddElement(this);" />
</div>
<div style="position: relative;">
<ul id="commentList">
<li>alex</li>
<li>eric</li>
</ul>
</div>
</div>
<script>
function AddElement(ths) {
// 获取输入的值
var val = ths.previousElementSibling.value;
ths.previousElementSibling.value = "";
var commentList = document.getElementById('commentList');
//第一种形式，字符串方式
//var str = "<li>" + val + "</li>";
// 'beforeBegin'、 'afterBegin'、 'beforeEnd'、 'afterEnd'
// beforeEnd内部最后
// beforeBegin 外部上边
//afterBegin 内部贴身
//afterEnd 外部贴墙
//commentList.insertAdjacentHTML("beforeEnd",str);
//第二种方式，元素的方式
var tag = document.createElement('li');
tag.innerText = val;
var temp = document.createElement('a');
temp.innerText = '百度';
temp.href = "http://etiantian.org";
tag.appendChild(temp);
// commentList.appendChild(tag);
commentList.insertBefore(tag,commentList.children[1]);
}
</script>
</body>
</html>
效果：
10、固定左菜单栏
<!DOCTYPE html>
<html>
<head lang="en">
<meta charset="UTF-8">
<title></title>
</head>
<style>
body{
margin: 0px;
}
img {
border: 0;
}
ul{
padding: 0;
margin: 0;
list-style: none;
}
h1{
padding: 0;
margin: 0;
}
.clearfix:after {
content: ".";
display: block;
height: 0;
clear: both;
visibility: hidden;
}
.wrap{
980px;
margin: 0 auto;
}
.pg-header{
background-color: #303a40;
-webkit-box-shadow: 0 2px 5px rgba(0,0,0,.2);
-moz-box-shadow: 0 2px 5px rgba(0,0,0,.2);
box-shadow: 0 2px 5px rgba(0,0,0,.2);
}
.pg-header .logo{
float: left;
padding:5px 10px 5px 0px;
}
.pg-header .logo img{
vertical-align: middle;
110px;
height: 40px;
}
.pg-header .nav{
line-height: 50px;
}
.pg-header .nav ul li{
float: left;
}
.pg-header .nav ul li a{
display: block;
color: #ccc;
padding: 0 20px;
text-decoration: none;
font-size: 14px;
}
.pg-header .nav ul li a:hover{
color: #fff;
background-color: #425a66;
}
.pg-body{
}
.pg-body .catalog{
position: absolute;
top:60px;
200px;
background-color: #fafafa;
bottom: 0px;
}
.pg-body .catalog.fixed{
position: fixed;
top:10px;
}
.pg-body .catalog .catalog-item.active{
color: #fff;
background-color: #425a66;
}
.pg-body .content{
position: absolute;
top:60px;
700px;
margin-left: 210px;
background-color: #fafafa;
overflow: auto;
}
.pg-body .content .section{
height: 500px;
border: 1px solid red;
}
</style>
<body onscroll="ScrollEvent();">
<div class="pg-header">
<div class="wrap clearfix">
<div class="logo">
<a href="#">
<img src="http://core.pc.lietou-static.com/revs/images/common/logo_7012c4a4.pn">
</a>
</div>
<div class="nav">
<ul>
<li>
<a href="#">首页</a>
</li>
<li>
<a href="#">功能一</a>
</li>
<li>
<a href="#">功能二</a>
</li>
</ul>
</div>
</div>
</div>
<div class="pg-body">
<div class="wrap">
<div class="catalog" id="catalog">
<div class="catalog-item" auto-to="function1"><a>第1张</a></div>
<div class="catalog-item" auto-to="function2"><a>第2张</a></div>
<div class="catalog-item" auto-to="function3"><a>第3张</a></div>
</div>
<div class="content" id="content">
<div menu="function1" class="section">
<h1>第一章</h1>
</div>
<div menu="function2" class="section">
<h1>第二章</h1>
</div>
<div menu="function3" class="section" style="height:100px;">
<h1>第三章</h1>
</div>
</div>
</div>
</div>
<script>
function ScrollEvent(){
var bodyScrollTop = document.body.scrollTop;
if(bodyScrollTop>50){
document.getElementsByClassName('catalog')[0].classList.add('fixed');
}else{
document.getElementsByClassName('catalog')[0].classList.remove('fixed');
}
var content = document.getElementById('content');
var sections = content.children;
for(var i=0;i<sections.length;i++){
var current_section = sections[i];
// 当前标签距离顶部绝对高度
var scOffTop = current_section.offsetTop + 60;
// 当前标签距离顶部，相对高度
var offTop = scOffTop - bodyScrollTop;
// 当前标签高度
var height = current_section.scrollHeight;
if(offTop<0 && -offTop < height){
// 当前标签添加active
// 其他移除 active
// 如果已经到底部，现实第三个菜单
// 文档高度 ＝ 滚动高度 + 视口高度
var a = document.getElementsByClassName('content')[0].offsetHeight + 60;
var b = bodyScrollTop + document.documentElement.clientHeight;
console.log(a+60,b);
if(a == b){
var menus = document.getElementById('catalog').children;
var current_menu = document.getElementById('catalog').lastElementChild;
current_menu.classList.add('active');
for(var j=0;j<menus.length;j++){
if(menus[j] == current_menu){
}else{
menus[j].classList.remove('active');
}
}
}else{
var menus = document.getElementById('catalog').children;
var current_menu = menus[i];
current_menu.classList.add('active');
for(var j=0;j<menus.length;j++){
if(menus[j] == current_menu){
}else{
menus[j].classList.remove('active');
}
}
}
break;
}
}
}
</script>
</body>
</html>
效果：
11、滚动菜单（升级版）
固定左菜单栏并且滑动内容章节，菜单栏也跟随变化到该章节
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
<style>
body{
margin: 0;
background-color: #dddddd;
}
.w{
margin: 0 auto;
980px;
}
.pg-header{
background-color: black;
color: white;
height: 48px;
}
.pg-body .menu{
position: absolute;
left: 200px;
180px;
background-color: white;
float: left;
}
.pg-body .menu .active{
background-color: #425a66;
color: white;
}
.pg-body .fixed{
position: fixed;
top: 10px;
}
.pg-body .content{
position: absolute;
left: 385px;
right: 200px;
background-color: white;
float: left;
}
.pg-body .content .item{
height: 900px;
}
</style>
</head>
<body onscroll="Hua();">
<div class="pg-header">
<div class="w">
</div>
</div>
<div class="pg-body">
<div id="menu" class="menu">
<ul>
<li>第一章</li>
<li>第二章</li>
<li>第三章</li>
</ul>
</div>
<div id="content" class="content">
<div class="item">床前明月管</div>
<div class="item">疑是地上霜</div>
<div class="item" style="height: 100px;">我是郭德纲</div>
</div>
</div>
<script>
function Hua() {
var huaGao = document.body.scrollTop;
var caiDan = document.getElementById('menu');
if(huaGao>48){
caiDan.classList.add('fixed');
}else{
caiDan.classList.remove('fixed');
}
var items = document.getElementById('content').children;
for(var i=0;i<items.length;i++){
var currentItem = items[i];
var currentItemBodyTop = currentItem.offsetTop + currentItem.offsetParent.offsetTop;
var currentItemWindowTop = currentItemBodyTop - huaGao;
console.log(currentItemWindowTop);
var currentHeight = currentItem.offsetHeight;
var bottomHeight = currentItemBodyTop+currentHeight;
if(currentItemWindowTop<0 && huaGao < bottomHeight){
var ziJi = caiDan.getElementsByTagName('li')[i];
ziJi.className = 'active';
var lis = caiDan.getElementsByTagName('li');
for(var j = 0;j<lis.length;j++){
if (ziJi == lis[j]){
}else {
lis[j].classList.remove('active');
}
}
break;
}
}
}
</script>
</body>
</html>
效果：
￥