JQ实现弹幕效果，快来吐糟你的想法吧
代码如下，复制即可使用：
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8" />
<title>JQ实现弹幕效果</title>
<style type="text/css">
*{
padding: 0;
margin: 0;
}
#box{
height:700px;
width:1000px;
margin: 0 auto;
border:1px solid #000000;
position: relative;
}
#main{
width:100%;
height:605px;
position: relative;
overflow: hidden;
}
p{
position: absolute;
left:1000px;
width:200px;
top:0;
}
#bottom{
width:100%;
height:80px;
background: #ABCDEF;
text-align: center;
padding-top: 15px;
position: absolute;
left: 0;
bottom: 0;
}
#txt{
width:300px;
height:50px;
}
#btn{
width:100px;
height:50px;
}
</style>
</head>
<body>
<div id="box">
<div id="main">
</div>
<div id="bottom">
<input type="text" id="txt" placeholder="请输入内容" />
<input type="button" id="btn" value="发射" />
</div>
</div>
<script src="http://libs.baidu.com/jquery/1.9.1/jquery.js"></script>
<script type="text/javascript">
$(function(){
var pageH=parseInt($("#main").height());
var colorArr=["#cfaf12","#12af01","#981234","#adefsa","#db6be4","#f5264c","#d34a74"];
$("#btn").bind("click",auto);
document.onkeydown=function(e){
if(e.keyCode == 13){
auto();
}
};
function auto(){
var $value = $("#txt").val();
$("#main").append("<p>" + $value + "</p>");
$("#txt").val("");
var _top=parseInt(pageH*(Math.random()));
var num=parseInt(colorArr.length*(Math.random()));
$("p:last-child").css({"top":_top,"color":colorArr[num],"font-size":"20px"});
$("p:last-child").animate({"left":"-200px"},10000);
$("p:last-child").stop().animate({"left":"-300px"},10000,"linear",function(){
$(this).remove();
});
//console.log($value);
};
})
</script>
</body>
</html>
实例扩展：
<!doctype html>
<html>
<head>
<meta charset="utf-8">
<title></title>
<style type="text/css">
html, body {
margin: 0px;
padding: 0px;
width: 100%;
height: 100%;
font-family: "微软雅黑";
font-size: 62.5%;
}
.boxDom {
width: 100%;
height: 100%;
position: relative;
overflow: hidden;
}
.idDom {
width: 100%;
height: 10%;
background: #666;
position: fixed;
bottom: 0px;
}
.content {
display: inline-block;
width: 460px;
height: 40px;
position: absolute;
left: 0px;
right: 0px;
top: 0px;
bottom: 0px;
margin: auto;
}
.title {
display: inline;
font-size: 4em;
vertical-align: bottom;
color: #fff;
}
.text {
border: none;
width: 300px;
height: 30px;
border-radius: 5px;
font-size: 2.4em;
}
.btn {
width: 60px;
height: 30px;
background: #f90000;
border: none;
color: #fff;
font-size: 2.4em;
}
span {
height: 40px;
position: absolute;
overflow: hidden;
color: #000;
font-size: 4em;
line-height: 1.5em;
cursor: pointer;
white-space: nowrap;
}
#boxDom video{
width: 80%;
height: 90%;
float: left;
}
#boxDom .list-info{
width: 20%;
height: 90%;
float: left;
background-color: #666;
overflow-y: auto;
overflow-x: hidden;
position: relative;
z-index: 999;
}
.list-info p{
font-size: 15px;
line-height: 20px;
border-bottom: 1px dashed #ccc;
text-indent: 2em;
color: #fff;
}
</style>
</head>
<body>
<div class="boxDom" id="boxDom">
<video controls="controls" src="movie/10_2fdd2bbcd15c68497744f07d4527cef2_3.mp4"></video>
<div class="list-info"> </div>
<div class="idDom" id="idDom">
<div class="content">
<p class="title">吐槽:</p>
<input type="text" class="text" id="text"/>
<button type="button" class="btn" id="btn">发射</button>
</div>
</div>
</div>
<script src="js/jquery-1.12.4.js"></script>
<script>
//生成随机颜色
var randomColor=function(){
var r= Math.floor(Math.random()*257);
var g= Math.floor(Math.random()*257);
var b= Math.floor(Math.random()*257);
return "rgb("+r+","+g+","+b+")";
}
//定义数组保存弹幕
var saveDan=[],index=0,tm;
//弹幕自动移动方法
var autoAnimate=function(){
index++;
index>saveDan.length-1 && (index=0);
saveDan[index].appendTo($("#boxDom")).animate({
"right":$(document).width(),
},10000,function () {
$(this).css("right",$(".list-info").width()-$(this).width()).remove();
});
}
//点击创建弹幕
$("#btn").click(function () {
var txt=$("#text");
var randomTop=Math.floor(Math.random()*($("#boxDom video").height()-40));
if(txt.val().trim().length==0)return;
var span= $("<span></span>").text(txt.val()).css({
"color":randomColor(),
"top":randomTop,
"right":$(".list-info").width(),
"z-index":888
});
saveDan.unshift(span);//将新的弹幕添加到数组内容的前面
//添加弹幕列表
$("<p></p>").text(txt.val()).css("color",randomColor()).prependTo($(".list-info"));
txt.val("");//清空文本框
//自动跑起来
clearInterval(tm);
index=saveDan.length-1
tm=setInterval(autoAnimate,1000);
});
//enter键确认发送
$(document).keydown(function (e) {
var e=e||window.event;
e.keyCode==13 && ($("#btn").click());
});
</script>
</body>
</html>
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