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JavaScript implements four-directional text seamless scrolling effect
JavaScript implements four-directional text seamless scrolling effect
This article mainly shares with you the code for controllable four-directional text seamless scrolling using pure JavaScript. The effect is very good. Friends in need can refer to it.
Achieve a seamless text scrolling effect:
<!DOCTYPE html>
<!--[if lt IE 7 ]> <html lang="zh-CN" class="ie6"> <![endif]-->
<!--[if IE 7 ]> <html lang="zh-CN" class="ie7"> <![endif]-->
<!--[if IE 8 ]> <html lang="zh-CN" class="ie8"> <![endif]-->
<!--[if IE 9 ]> <html lang="zh-CN" class="ie9"> <![endif]-->
<!--[if (gt IE 9)|!(IE)]><!--> <html lang="zh-CN"> <!--<![endif]-->
<head>
<title>文字滚动</title>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8"/>
<style type="text/css">
*{margin:0;padding:0;}
body{padding:20px;}
.textbox{border:1px solid #ddd;width:auto;overflow: hidden;}
.textbox ul{list-style: none;position: relative;}
.textbox ul li{padding:5px 0;}
</style>
</head>
<body class="home-page">
<p id="textbox" class="textbox">
<ul>
<li>汽车 | 运动B级车降3万5 </li>
<li>家居 | 这么厉害的装修 女人真的要坐不住了</li>
<li>教育 | 各省前三报考华工重奖10万元/人</li>
<li>汽车 | 运动B级车降3万5 平行进口车加价11万</li>
<li>健康 | 滥用激素酿苦果 14岁男孩10年不长个儿</li>
<li>数码 | 最新手机报价 说好的宽带降费提速呢？</li>
<li>汽车 | 平行进口车加价11万</li>
<li>汽车 | 运动B级车降3万5</li>
<li>汽车 | 平行进口车加价11万</li>
<li>运动 | 恒大亚冠生死战 猜比分赢正版球衣</li>
</ul>
<a href="#" class="btnPrev">向左</a>
<a href="#" class="btnNext">向右</a>
</p>
<br>
<br>
<p id="textbox2" class="textbox">
<ul>
<li>汽车 | 运动B级车降3万5 </li>
<li>家居 | 这么厉害的装修 女人真的要坐不住了</li>
<li>教育 | 各省前三报考华工重奖10万元/人</li>
<li>汽车 | 运动B级车降3万5 平行进口车加价11万</li>
<li>健康 | 滥用激素酿苦果 14岁男孩10年不长个儿</li>
<li>数码 | 最新手机报价 说好的宽带降费提速呢？</li>
<li>汽车 | 平行进口车加价11万</li>
<li>汽车 | 运动B级车降3万5</li>
<li>汽车 | 平行进口车加价11万</li>
<li>运动 | 恒大亚冠生死战 猜比分赢正版球衣</li>
</ul>
<a href="#" class="btnPrev">向上</a>
<a href="#" class="btnNext">向下</a>
</p>
<script type="text/javascript" src="script/jquery-1.11.1.min.js"></script>
<script type="text/javascript">
//四方向无缝滚动
scroll('#textbox',{vis:2,btnHidden:false,dir:'prev',type:'h'});
scroll('#textbox2',{vis:3,btnHidden:false,dir:'prev',type:'v'});
function scroll(container,options){
var box = $(container);
var boxUl = box.find('ul').eq(0);
var LiHeight = 0; //不包含克隆li列表高度
var cloneLiHeight = 0; //包含克隆li列表高度
var LiWidth = 0; //不包含克隆li列表宽度
var cloneLiWidth = 0; //包含克隆li列表宽度
var Lis = boxUl.children();
var btnPrev = box.find('.btnPrev');
var btnNext = box.find('.btnNext');
//默认参数
var defult= {
vis : 2, //显示个数
autoPlay:true, //自动播放
speed :50, //滚动速度
dir:'prev', //滚动方向
btnHidden:false, //按钮是否隐藏
type:'v' // 水平或者垂直方向
};
var opt = $.extend({},defult,options);
//构建DOM结构
var lastClone=0; //最后克隆元素
var lastCloneHeight=0;//最后克隆元素高度
var allCloneHeight=0;//全部克隆元素总高度
var lastCloneWidth=0;
var allCloneWidth=0;
var visHeight=0; //可视高度
var visWidth=0;
var boxUl_wrap;
if(opt.type === "v"){ //垂直方向
Lis.each(function(){
$(this).height($(this).height());
LiHeight += $(this).outerHeight(true);
});
lastClone= boxUl.children(':last').clone().addClass('clone').prependTo(boxUl);
lastCloneHeight = lastClone.outerHeight(true);
allCloneHeight = lastClone.outerHeight(true);
for(var i = 0; i < opt.vis ; i++){
Lis.eq(i).clone().addClass('clone').appendTo(boxUl);
allCloneHeight += Lis.eq(i).outerHeight(true);
}
visHeight = allCloneHeight - lastCloneHeight;
cloneLiHeight = LiHeight + allCloneHeight;
boxUl_wrap = $('<p></p>').css({'width':'100%','height':visHeight,'overflow':'hidden','position':'relative'}).attr('id','ulWrap');
boxUl.css({'height':cloneLiHeight,'top':-lastCloneHeight}).wrap(boxUl_wrap);
}else if(opt.type ==="h"){ //水平方向
Lis.css({'whiteSpace':'nowrap','float':'left','paddingRight':'10px'});
Lis.each(function(){
$(this).width($(this).width());
LiWidth += $(this).outerWidth(true);
});
lastClone= boxUl.children(':last').clone().addClass('clone').prependTo(boxUl);
lastCloneWidth= lastClone.outerWidth(true);
allCloneWidth = lastClone.outerWidth(true);
for(var j = 0; j < opt.vis ; j++){
Lis.eq(j).clone().addClass('clone').appendTo(boxUl);
allCloneWidth += Lis.eq(j).outerWidth(true);
}
visHeight = Lis.eq(0).outerHeight(true);
visWidth = allCloneWidth - lastCloneWidth;
cloneLiWidth = LiWidth + allCloneWidth;
boxUl_wrap = $('<p></p>').css({'width':visWidth,'height':visHeight,'overflow':'hidden','position':'relative'}).attr('id','ulWrap');
boxUl.css({'width':cloneLiWidth,'left':-lastCloneWidth}).wrap(boxUl_wrap);
box.css({'width':visWidth});
}
//添加事件处理
var timer = null;
var scrollTop = function(){
clearInterval(timer);
timer = setInterval(function(){
var tmp = parseInt(boxUl.css('top').replace('px',""));
tmp--;
boxUl.animate({'top':tmp},0,function(){
if(tmp <= -(LiHeight + lastCloneHeight)){
boxUl.css('top',-lastCloneHeight);
}
});
},opt.speed);
};
var scrollDown = function(){
clearInterval(timer);
timer = setInterval(function(){
var tmp = parseInt(boxUl.css('top').replace('px',""));
tmp++;
boxUl.animate({'top':tmp},0,function(){
if(tmp >= 0){
boxUl.css('top',-(LiHeight));
}
});
},opt.speed);
};
var scrollLeft = function(){
clearInterval(timer);
timer = setInterval(function(){
var tmp = parseInt(boxUl.css('left').replace('px',""));
tmp--;
boxUl.animate({'left':tmp},0,function(){
if(tmp <= -(LiWidth + lastCloneWidth)){
boxUl.css('left',-(lastCloneWidth));
}
});
},opt.speed);
};
var scrollRight = function(){
clearInterval(timer);
timer = setInterval(function(){
var tmp = parseInt(boxUl.css('left').replace('px',""));
tmp++;
boxUl.animate({'left':tmp},0,function(){
if(tmp >= 0){
boxUl.css('left',-(LiWidth));
}
});
},opt.speed);
};
var scrollType = function(type,dir){
if(Lis.length >= opt.vis){ //显示个数不能多于列表个数，否则不显示效果
var sdir = typeof dir!=="undefined" ? dir : opt.dir;
switch(type){
case "v":
if(sdir == "prev"){scrollTop();}else{scrollDown();}
break;
case "h":
if(sdir == "prev"){scrollLeft();}else{scrollRight();}
}
}
};
if(opt.autoPlay){
scrollType(opt.type);
}
//添加事件处理
box.find('#ulWrap').hover(function(){
clearInterval(timer);
},function(){
scrollType(opt.type);
});
//按钮是否隐藏
if(!opt.btnHidden){
btnPrev.unbind('mouseover');
btnNext.unbind('mouseover');
btnPrev.mouseover(function(){
scrollType(opt.type,"prev");
});
btnNext.mouseover(function(){
scrollType(opt.type,"next");
});
}else{
btnPrev.hide();
btnNext.hide();
}
}
</script>
</body>
</html>Some problems:
No problem in local testing, but through document After .write() inputs and executes the code, there will be a problem in obtaining the height() of li in vertical mode. The reason is unknown and very puzzling..
The above is the entire content of this article. I hope you all like it.
For more related tutorials, please visit JavaScript Basics Tutorial
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