前端
2018-12-10 本文已影响0人
周肸
1.事件冒泡
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Document</title>
<style type="text/css">
.grandfather{
width:300px;
height:300px;
background-color:green;
position:relative;
}
.father{
width:200px;
height:200px;
background-color:gold;
}
.son{
width:100px;
height:100px;
background-color:red;
position:absolute;
left:0;
top:400px;
}
</style>
<script type="text/javascript" src="js/jquery-1.12.4.min.js"></script>
<script type="text/javascript">
$(function(){
$('body').click(function() {
alert(4);
});
$('.grandfather').click(function() {
alert(3);
});
$('.father').click(function() {
alert(2);
});
$('.son').click(function(ev) {
alert(1);
//ev.stopPropagation();
//console.log(ev);
//alert(ev.clientX);
return false;
});
$(document).contextmenu(function(event) {
//event.preventDefault();
return false;
});
});
</script>
</head>
<body>
<div class="grandfather">
<div class="father">
<div class="son"></div>
</div>
</div>
</body>
</html>
2.置顶菜单
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>置顶菜单</title>
<script type="text/javascript" src="js/jquery-1.12.4.min.js"></script>
<script type="text/javascript">
$(function(){
$(window).scroll(function() {
var nowTop = $(document).scrollTop();
if(nowTop>200){
$('.menu').css({
position:'fixed',
left:'50%',
top:0,
marginLeft:-480
});
$('.menu_pos').show();
}
else{
$('.menu').css({
position:'static',
marginLeft:'auto'
});
$('.menu_pos').hide();
}
if(nowTop>400){
$('.totop').fadeIn();
}
else{
$('.totop').fadeOut();
}
});
$('.totop').click(function() {
$('html,body').animate({'scrollTop':0});
});
})
</script>
<style type="text/css">
body{margin:0px;}
.logo_bar{
width:960px;
height:200px;
background-color:#f0f0f0;
margin:0 auto;
}
.menu,.menu_pos{
width:960px;
height:50px;
margin:0 auto;
background-color:gold;
text-align:center;
line-height:50px;
}
.menu_pos{
display:none;
}
.down_con{
width:960px;
height:1800px;
margin:0 auto;
}
.down_con p{
margin-top:100px;
text-align:center;
}
.totop{
width:50px;
height:50px;
background:url(images/up.png) center center no-repeat #000;
border-radius:50%;
position:fixed;
right:50px;
bottom:50px;
display:none;
}
</style>
</head>
<body>
<div class="logo_bar">顶部logo</div>
<div class="menu">置顶菜单</div>
<div class="menu_pos"></div>
<div class="down_con">
<p style="color:red">网站主内容</p>
<p>网站主内容</p>
<p>网站主内容</p>
<p>网站主内容</p>
<p>网站主内容</p>
</div>
<a href="javascript:;" class="totop"></a>
</body>
</html>
3.无缝滚动
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>无缝滚动</title>
<style type="text/css">
body,ul,li{margin:0;padding:0}
ul{list-style:none;}
.slide{
width:500px;
height:100px;
border:1px solid #ddd;
margin:20px auto 0;
position:relative;
overflow:hidden;
}
.slide ul{
position:absolute;
width:1000px;
height:100px;
left:0;
top:0;
}
.slide ul li{
width:90px;
height:90px;
margin:5px;
background-color:#ccc;
line-height:90px;
text-align: center;
font-size:30px;
float:left;
}
.btns{
width:500px;
height:50px;
margin:10px auto 0;
}
</style>
<script type="text/javascript" src="js/jquery-1.12.4.min.js"></script>
<script type="text/javascript">
$(function(){
var $ul = $('#slide ul');
var left = 0;
var deraction = 2;
$ul.html($ul.html()+$ul.html());
var timer = setInterval(move,30);
function move(){
left-=deraction;
if(left<-500){
left = 0;
}
if(left>0){
left=-500;
}
$ul.css({left:left});
}
$('#btn1').click(function(){
deraction = 2;
});
$('#btn2').click(function(){
deraction = -2;
})
$('#slide').mouseover(function(){
clearInterval(timer);
})
$('#slide').mouseout(function(){
timer = setInterval(move,30);
})
})
</script>
</head>
<body>
<div class="btns">
<input type="button" name="" value="向左" id="btn1">
<input type="button" name="" value="向右" id="btn2">
</div>
<div class="slide" id="slide">
<ul>
<li>1</li>
<li>2</li>
<li>3</li>
<li>4</li>
<li>5</li>
</ul>
</div>
</body>
</html>
