zoukankan html css js c++ java

直播评论发弹幕切图功能点集合

一、代码

html+js

<!DOCTYPE HTML>
<html>
<head>
<meta charset="utf-8">
<title>数发直播平台</title>
<link rel="stylesheet" type="text/css" href="css/common.css">
<link rel="stylesheet" type="text/css" href="css/style.css">
<script src="http://static9.pplive.cn/vip/201507/pay/v_20150721174241/js/jquery.min.js"></script>
</head>
<body id="body"  class="">
<div class="lv-wrapper cf">
    <div class="lv-right-interact">
        <div class="lv-right-interact-menu cf ">
            <a href="javascript:;" title="节目单" class="show now" data-target="liveprogram"></a>
            <a href="javascript:;" title="弹幕" class="barrage" data-target="barrage"><i class="ic2"></i></a>
        </div>
        <div class="tabcon" >  
            <!--弹幕-->
            <div class="barrage">
                <div class="chat-wrap">
                    <div class="chat">
                    <ul>
                        <li class="">
                            <span class="" data-name="sysmsg">系统消息：</span>
                            <span class="txt">欢迎进入宁夏卫视!</span>
                        </li>
                        <li class="">
                            <span class="vipcolor" data-name="liiuxiaobao">starof<i class="vip"></i>：</span>
                            <span class="txt">评论1</span>
                        </li>
                        <li class="">
                            <span class="vipcolor" data-name="liiuxiaobao">starof<i class="vip"></i>：</span>
                            <span class="txt">我的评论很长很长很长很长很长很长很长很长很长很长很长很长很长</span>
                        </li>
                        <li class="">
                            <span class="vipcolor" data-name="liiuxiaobao">starof<i class="vip"></i>：</span>
                            <span class="txt">评论1</span>
                        </li>
                        <li class="">
                            <span class="vipcolor" data-name="liiuxiaobao">starof<i class="vip"></i>：</span>
                            <span class="txt">我的评论很长很长很长很长很长很长很长很长很长很长很长很长很长</span>
                        </li><li class="">
                            <span class="vipcolor" data-name="liiuxiaobao">starof<i class="vip"></i>：</span>
                            <span class="txt">评论1</span>
                        </li>
                        <li class="">
                            <span class="vipcolor" data-name="liiuxiaobao">starof<i class="vip"></i>：</span>
                            <span class="txt">我的评论很长很长很长很长很长很长很长很长很长很长很长很长很长</span>
                        </li><li class="">
                            <span class="vipcolor" data-name="liiuxiaobao">starof<i class="vip"></i>：</span>
                            <span class="txt">评论1</span>
                        </li>
                        <li class="">
                            <span class="vipcolor" data-name="liiuxiaobao">starof<i class="vip"></i>：</span>
                            <span class="txt">我的评论很长很长很长很长很长很长很长很长很长很长很长很长很长</span>
                        </li><li class="">
                            <span class="vipcolor" data-name="liiuxiaobao">starof<i class="vip"></i>：</span>
                            <span class="txt">评论1</span>
                        </li>
                        <li class="">
                            <span class="vipcolor" data-name="liiuxiaobao">starof<i class="vip"></i>：</span>
                            <span class="txt">我的评论很长很长很长很长很长很长很长很长很长很长很长很长很长</span>
                        </li><li class="">
                            <span class="vipcolor" data-name="liiuxiaobao">starof<i class="vip"></i>：</span>
                            <span class="txt">评论1</span>
                        </li>
                        <li class="">
                            <span class="vipcolor" data-name="liiuxiaobao">starof<i class="vip"></i>：</span>
                            <span class="txt">我的评论很长很长很长很长很长很长很长很长很长很长很长很长很长</span>
                        </li><li class="">
                            <span class="vipcolor" data-name="liiuxiaobao">starof<i class="vip"></i>：</span>
                            <span class="txt">评论1</span>
                        </li>
                        <li class="">
                            <span class="vipcolor" data-name="liiuxiaobao">starof<i class="vip"></i>：</span>
                            <span class="txt">我的评论很长很长很长很长很长很长很长很长很长很长很长很长很长</span>
                        </li><li class="">
                            <span class="vipcolor" data-name="liiuxiaobao">starof<i class="vip"></i>：</span>
                            <span class="txt">评论1</span>
                        </li>
                        <li class="">
                            <span class="vipcolor" data-name="liiuxiaobao">starof<i class="vip"></i>：</span>
                            <span class="txt">我的评论很长很长很长很长很长很长很长很长很长很长很长很长很长</span>
                        </li><li class="">
                            <span class="vipcolor" data-name="liiuxiaobao">starof<i class="vip"></i>：</span>
                            <span class="txt">评论1</span>
                        </li>
                        <li class="">
                            <span class="vipcolor" data-name="liiuxiaobao">starof<i class="vip"></i>：</span>
                            <span class="txt">我的评论很长很长很长很长很长很长很长很长很长很长很长很长很长</span>
                        </li><li class="">
                            <span class="vipcolor" data-name="liiuxiaobao">starof<i class="vip"></i>：</span>
                            <span class="txt">评论1</span>
                        </li>
                        <li class="">
                            <span class="vipcolor" data-name="liiuxiaobao">starof<i class="vip"></i>：</span>
                            <span class="txt">我的评论很长很长很长很长很长很长很长很长很长很长很长很长很长</span>
                        </li><li class="">
                            <span class="vipcolor" data-name="liiuxiaobao">starof<i class="vip"></i>：</span>
                            <span class="txt">评论1</span>
                        </li>
                        <li class="">
                            <span class="vipcolor" data-name="liiuxiaobao">starof<i class="vip"></i>：</span>
                            <span class="txt">我的评论很长很长很长很长很长很长很长很长很长很长很长很长很长</span>
                        </li>
                        <li class="">
                            <span class="vipcolor" data-name="_11367384@qq">_11367384@qq<i class="vip"></i>：</span>
                            <span class="txt">fasf</span>
                        </li>
                    </ul>
                </div>
                </div>
                <div class="comments-area">
                    <div id="form-wrap">
                        <div class="formtext">
                        <textarea name="" rows="2" cols="1" maxlength="30" placeholder="请在这里输入评论" style="display:none;"></textarea>
                        <p class="num" style="display:none;">0/30</p>
                        <div class="user_facebox" style="display:none;"></div>
                        <div class="loginarea" style="display: block;">
                            <p class="tips login" style="display: none;">
                                <a href="javascript:void(0);" data-type="login" title="登录">登录</a>
                                或 <a href="javascript:void(0);" data-type="reg" title="注册">注册</a>后可以发送弹幕
                            </p>
                            <p class="tips bindphone" >
                                <a href="http://passport.pptv.com/checkPhone.aspx" target="_blank">绑定手机</a>即可发送弹幕哦
                            </p>
                            <p class="tips wait" style="display:none"><em>5</em> 秒后可再次评论</p>
                        </div>
                    </div>
                        <a href="javascript:void(0);" class="btn-submit">发送</a>
                        <a href="javascript:void(0);" class="btn-set"></a>
                        <div class="setform">
                            <ul class="dm-config cf">
                                <li class="dmopacity">
                                    <span class="dm-setname">弹幕显示设置</span>
                                    <div class="dragbar" style="position: relative;">
                                        <span class="progress"></span>
                                        <span class="icon" style="position: absolute;"></span>
                                    </div>
                                    <span class="percent">50%</span>
                                </li>
                                <li>
                                    <span class="dm-setname">我的弹幕设置</span>
                                    <div class="rgb-set cf">
                                        <span>颜色</span>
                                        <span class="rgb">#ffffff</span>
                                        <span class="color" style="background:#ffffff"></span>
                                    </div>
                                    <div class="takecolor cf">
                                        <a href="javascript:;" data-color="ff0000" style="background:#ff0000;"></a>
                                        <a href="javascript:;" data-color="3399ff" style="background:#3399ff;"></a>
                                        <a href="javascript:;" data-color="00fcff" style="background:#00fcff;"></a>
                                        <a href="javascript:;" data-color="ff9900" style="background:#ff9900;"></a>
                                        <a href="javascript:;" data-color="00ff12" style="background:#00ff12;"></a>
                                        <a href="javascript:;" data-color="fff100" style="background:#fff100;"></a>
                                        <a href="javascript:;" data-color="c8b33c" style="background:#c8b33c;"></a>
                                        <a href="javascript:;" data-color="ff0096" style="background:#ff0096;"></a>
                                        <a href="javascript:;" data-color="8600ff" style="background:#8600ff;"></a>
                                        <a href="javascript:;" data-color="3399ff" style="background:#3399ff;"></a>
                                   </div>
                               </li>
                           </ul>
                       </div>
                    </div>
                    <!--绑定手机提示-->
                    <div class="pop-phone" style="display: none;">
                        <a href="javascript:void(0);" title="关闭" class="close"></a>
                        <div class="bd">
                            <h4>提示</h4>
                            <ul>
                                <li>绑定完成前请不要关闭此窗口。</li>
                            </ul>
                            <p>
                                <a href="javascript:void(0);" title="" class="locked">已绑定手机</a>
                                <a class="failed" href="http://bbs.pptv.com/forum.php?mod=viewthread&amp;tid=31660" target="_blank">绑定遇到问题</a>
                            </p>
                        </div>
                    </div>
                </div>
            </div>
        </div>
    </div>
</div>
</body>
<script>
dragbar(85);
function dragbar( barwidth){
//var $box = $('.dragbar');
        var $bg = $('.dragbar');
        var $bgcolor = $('.progress');
        var $btn = $('.icon');
        var $text = $('.percent');
        var statu = false;
        var ox = 0;
        var lx = 0;
        var left = 0;
        var bgleft = 0;
        $btn.mousedown(function(e) {
            lx = $btn.offset().left; //距离浏览器左边的距离
            ox = e.pageX - left;
            statu = true;
        });
        $(document).mouseup(function() {
            statu = false;
        });
        $bg.mousemove(function(e) {
            if (statu) {
                left = e.pageX - ox;
                if (left < 0) {
                    left = 0;
                }
                if (left > barwidth) {
                    left = barwidth;
                }
                $btn.css('left', left);
                $bgcolor.width(left);
                $text.html(parseInt(left / barwidth*100) + '%');
            }
        });
        $bg.click(function(e) {
            if (!statu) {
                bgleft = $bg.offset().left;
                left = e.pageX - bgleft;
                if (left < 0) {
                    left = 0;
                }
                if (left > barwidth) {
                    left = barwidth;
                }
                $btn.css('left', left);
                $bgcolor.stop().animate({
                     left
                }, barwidth);
                $text.html(parseInt(left / barwidth*100) + '%');
            }
        });
}

//发表评论
$(".comments-area textarea").focus(function(){
    $("#form-wrap").addClass("focus");
});
$('.comments-area textarea').bind('input propertychange', function() { 
    $('.comments-area .num').html($('.comments-area textarea').val().length+"/30"); 
});  
$(".comments-area textarea").blur(function(){
    if($('.comments-area textarea').val().length==0){
        $("#form-wrap").removeClass("focus");
    }
});

$(".btn-set").click(function(evt){
    $(".setform").toggle();
    evt.stopPropagation?evt.stopPropagation():evt.cancelBubble=true;
});
$(".tabcon").click(function(){
    if($(".setform").is(":visible")){
        $(".setform").hide();
    }
});

$(".setform").click(function(evt){
    evt.stopPropagation?evt.stopPropagation():evt.cancelBubble=true;
});
$(".takecolor a").click(function(){
    $(".rgb-set .rgb").html("#"+$(this).attr("data-color"));
    $(".rgb-set .color").css("backgroundColor",$(this).css("backgroundColor"));
});
</script>

</html>

View Code

css

common.css

article,aside,audio,blockquote,body,button,code,dd,dialog,div,dl,dt,fieldset,figure,footer,form,h1,h2,h3,h4,h5,h6,header,hgroup,hr,legend,li,mark,menu,nav,ol,p,pre,section,table,tbody,td,textarea,tfoot,th,thead,time,ul,video{margin:0;padding:0;outline:0;background:transparent}article,aside,dialog,figure,footer,header,hgroup,nav,section{display:block}body,button,input,select,textarea{font:12px/1.5 arial,5b8b4f53,sans-serif}button,h1,h2,h3,h4,h5,h6,input,select,textarea{font-size:100%}address,cite,dfn,em,var{font-style:normal}code,kbd,pre,samp{font-family:courier new,courier,monospace}small{font-size:12px}li,ol,ul{list-style:none}img{border:none}a{text-decoration:none;outline:thin none;cursor:pointer}a:hover{text-decoration:underline}table{border-collapse:collapse;border-spacing:0}.clear{clear:both}.cf:after{visibility:hidden;display:block;font-size:0;content:" ";clear:both;height:0}.fr{float:right}.fl{float:left}html{-webkit-text-size-adjust:none}body{font:12px/1.5 5FAE8F6F96C59ED1,tahoma,arial,5b8b4f53,sans-serif}.tc{text-align:center}.tl{text-align:left}.tr{text-align:right}

View Code

style.css

.lv-wrapper{
    width:990px;
    margin:0 auto;
    clear:both;
}
/*交互区域*/
.lv-right-interact{
    width:310px;
    float:left;
    position:relative;
}
/*列表和评论按钮*/
.lv-right-interact-menu{width:100%;}
.lv-right-interact-menu a{float:left;width:155px;height:40px;background:#000 url(../images/videoicos.png);border-bottom:2px solid #313132;}
.lv-right-interact-menu .now,.lv-right-interact-menu a:hover{border-color:#c22;background-color:#232324;}
.lv-right-interact-menu .show{background-position:0px -44px;}
.lv-right-interact-menu .show.now,.lv-right-interact-menu .show:hover{background-position:0px 0px;}
.lv-right-interact-menu .barrage{background-position:156px -44px;}
.lv-right-interact-menu .barrage.now,.lv-right-interact-menu .barrage:hover{background-position:156px 0px;}

.lv-right-interact .tabcon{height:800px;background-color:#232323;}

/*评论区域*/
/*评论列表*/
.barrage .chat-wrap{
    position:relative;
    height:630px;
    overflow-x:hidden;
    padding:15px 5px 0 15px;
}
.barrage .chat-wrap .chat{
    height:630px;
    overflow-x:hidden;
}
.barrage .chat li {
    margin: 0 0 5px;
    color: #555;
}
.barrage .chat li span {
    color: #3271b7;
    display: inline;
}
.barrage .chat li span.txt {
    color: #8b8b8b;
}
.barrage .chat li span.vipcolor {
    color: #c22;
}
.barrage .chat li .vip {
    display: inline-block;
    width: 20px;
    height: 8px;
    margin: 0 0 0 5px;
    vertical-align: 1px;
    background: url(../images/videoicos.png) no-repeat -228px -86px;
}
/*发送评论*/
.barrage .comments-area{
    position:absolute;
    bottom:0px;
    left:0;
    width:270px;
    padding:20px;
    border-top:1px solid #222;
    background-color:#191919;
}
.comments-area .formtext{
    position:relative;
    padding:10px;
    border:1px solid #c9c9c9;
    background-color:#c9c9c9;        
}
.comments-area .formtext textarea{
    width:100%;
    height:30px;
    resize:none;
    overflow-y:hidden;
    background-color:#c9c9c9;
    color:#666;
    border:0 none;
}
.comments-area .formtext .num{
    position:absolute;
    bottom:3px;
    right:6px;
    color:#666;
}
.comments-area .btn-submit {
    float: right;
    display: inline;
    width: 42px;
    height: 24px;
    line-height: 24px;
    margin: 10px 0 0;
    text-align: center;
    color: #fff;
    background: #999;
}
.comments-area .btn-submit:hover{
    text-decoration:none;
}
.comments-area .btn-set {
    float: left;
    display: inline;
    width: 18px;
    height: 18px;
    margin: 12px 0 0;
    background: url(../images/videoicos.png) no-repeat -206px -86px;
}
/*聚焦时评论状态*/
.comments-area .focus .formtext{
    border-color:#c22;
    color:#191919;
    background-color:#fff;
}
.comments-area .focus .formtext textarea{
    background-color:#fff;
}
.comments-area .focus .btn-submit{
    background-color:#c22;
}
/*弹幕颜色*/
.comments-area .setform {
    position: absolute;
    z-index:99;
    color: #999;
    background: #252525;
    border: 1px solid #424242;
    width: 240px;
    padding: 12px 22px 18px 18px;
    top: -70px;
    left: 10px;
    -webkit-user-select: none;
    moz-user-select: -moz-none;
    -moz-user-select: none;
    -o-user-select: none;
    -khtml-user-select: none;
    -ms-user-select: none;
    user-select: none;
    display:none;
}
.comments-area  .dm-config {
    margin: 18px 0 0 0;
    display: block
}
.comments-area  .dm-config li {
    height: 90px
}
.comments-area  .dm-setname {
    font-size: 14px;
    color:#dedede;
    font-weight: bold;
    margin-bottom:20px;
    display: block
}

.comments-area  .rgb-set {
    height: 22px
}

.comments-area  .rgb-set span {
    float: left;
    display: inline;
    color:#999;
}

.comments-area  .rgb {
    width: 50px;
    height: 18px;
    border: 1px solid #d3d3d3;
    line-height: 18px;
    margin-left: 5px;
    color: #424242;
    padding: 0 0 0 5px
}

.comments-area  .color {
    width: 20px;
    height: 20px;
    border: 1px solid #d3d3d3;
    margin: -1px 0 0 2px
}

.comments-area  .takecolor {
    width: 80px;
    margin: 5px 0 0 30px
}

.comments-area  .takecolor a {
    display: block;
    width: 16px;
    height: 16px;
    float: left
}

.comments-area  .dmopacity {
    float: right;
    border-left: 1px solid #d3d3d3;
    padding-left: 22px
}
.comments-area  .dragbar {
    width: 85px;
    height: 10px;
    background: #d3d3d3;
    position: relative;
    margin-bottom: 10px;
    cursor: default
}

.comments-area  .dragbar .progress {
    width: 50%;
    position: absolute;
    height: 10px;
    top: 0;
    left: 0;
    background: #39f
}

.comments-area  .dragbar .icon {
    width: 4px;
    height: 16px;
    position: absolute;
    top: -3px;
    left: 50%;
    background: #007cf7
}

.comments-area  .percent {
    width: 85px;
    text-align: center;
    display: block;
    color: #39f
}
/*登录注册后发弹幕*/

.comments-area .formtext .tips {
    color: #666;
    padding: 11px 0;
    text-align: center;
}
.comments-area .formtext .tips a {
    padding: 0 5px 0 0;
    color: #39f;
}

.comments-area .formtext .wait em {
    color: #c22;
}
/*绑定手机提示框*/
.comments-area .pop-phone {
    position:absolute;
    left:30px;
    bottom:180px;
    width:250px;
    height:140px;
    box-shadow: -2px 5px 20px #000;
    border-radius: 5px;
    background: #4d4d4d;
    z-index:99;
}
.pop-phone .close {
    position: absolute;
    top: 5px;
    right: 5px;
    width: 28px;
    height: 28px;
    background:url(../images/videoicos.png) no-repeat -233px -154px;
    overflow: hidden;
}
.pop-phone .close:hover{
    background-position:-205px -154px;
}
.pop-phone .bd {
    margin: 10px 0 0 10px;
    padding: 0 0 0 20px;
    background: #4d4d4d url(../images/videoicos.png) no-repeat -255px -102px;
}
.pop-phone .bd h4 {
    font-size: 14px;
    font-weight: normal;
    color: #fff;
}
.pop-phone .bd ul {
    margin: 15px 0 0;
}
.pop-phone .bd li {
    line-height: 22px;
    color: #fff;
}
.pop-phone .bd p a {
    float: left;
    display: inline-block;
    width: 84px;
    height: 26px;
    margin: 15px 5px 0;
    line-height: 26px;
    text-align: center;
    color: #fff;
    border-radius: 2px;
    background: #888;
}
.pop-phone .bd p a:hover{
    text-decoration:none;
}
.pop-phone .bd p .locked:hover {
    background-color:#c22;
   
}

View Code

二、实现

1、效果：点击“设置”的图标打开设置内容框，点击其他地方关闭设置内容框。

1.1、点击“设置”的图标打开设置内容框，点击其他地方关闭设置内容框。

第一步：重复点击“设置”图标，内容框显示隐藏交替。

$(".btn-set").click(function(evt){
    $(".setform").toggle();
    //evt.stopPropagation?evt.stopPropagation():evt.cancelBubble=true;
});

第二步，点击其他区域，隐藏内容框。

$(".tabcon").click(function(){
    if($(".setform").is(":visible")){
        $(".setform").hide();
    }
});

此时会有问题，点击“设置图标”时显示不出来内容框。因为事件会冒泡，点击.btn-set后首先显示内容框，然后事件会冒泡到.tabcon的父元素，父元素绑定了事件让显示的内容框隐藏。解决方案就是阻止事件冒泡。即把第一步中的注释取消。

$(".btn-set").click(function(evt){
    $(".setform").toggle();
    evt.stopPropagation?evt.stopPropagation():evt.cancelBubble=true;
});

第三步，点击内容区，正常显示。

2、设置内容框样式

2.1实现html如下

<div class="setform">
                            <ul class="dm-config cf">
                                <li class="dmopacity">
                                    <span class="dm-setname">弹幕显示设置</span>
                                    <div class="dragbar" style="position: relative;">
                                        <span class="progress"></span>
                                        <span class="icon" style="position: absolute;"></span>
                                    </div>
                                    <span class="percent">50%</span>
                                </li>
                                <li>
                                    <span class="dm-setname">我的弹幕设置</span>
                                    <div class="rgb-set cf">
                                        <span>颜色</span>
                                        <span class="rgb">#ffffff</span>
                                        <span class="color" style="background:#ffffff"></span>
                                    </div>
                                    <div class="takecolor cf">
                                        <a href="javascript:;" data-color="ff0000" style="background:#ff0000;"></a>
                                        <a href="javascript:;" data-color="3399ff" style="background:#3399ff;"></a>
                                        <a href="javascript:;" data-color="00fcff" style="background:#00fcff;"></a>
                                        <a href="javascript:;" data-color="ff9900" style="background:#ff9900;"></a>
                                        <a href="javascript:;" data-color="00ff12" style="background:#00ff12;"></a>
                                        <a href="javascript:;" data-color="fff100" style="background:#fff100;"></a>
                                        <a href="javascript:;" data-color="c8b33c" style="background:#c8b33c;"></a>
                                        <a href="javascript:;" data-color="ff0096" style="background:#ff0096;"></a>
                                        <a href="javascript:;" data-color="8600ff" style="background:#8600ff;"></a>
                                        <a href="javascript:;" data-color="3399ff" style="background:#3399ff;"></a>
                                   </div>
                               </li>
                           </ul>
                       </div>

View Code

2.2实现css如下

/*弹幕颜色*/
.setform {
    z-index:99;
    color: #999;
    background: #252525;
    border: 1px solid #424242;
    width: 240px;
    padding: 12px 22px 18px 18px;
}
.dm-config {
    margin: 18px 0 0 0;
    display: block
}
.dm-config li {
    height: 90px
}
 .dm-setname {
    font-size: 14px;
    color:#dedede;
    font-weight: bold;
    margin-bottom:20px;
    display: block
}

.rgb-set {
    height: 22px
}

.rgb-set span {
    float: left;
    display: inline;
    color:#999;
}

.rgb {
    width: 50px;
    height: 18px;
    border: 1px solid #d3d3d3;
    line-height: 18px;
    margin-left: 5px;
    color: #424242;
    padding: 0 0 0 5px
}

.color {
    width: 20px;
    height: 20px;
    border: 1px solid #d3d3d3;
    margin: -1px 0 0 2px
}

.takecolor {
    width: 80px;
    margin: 5px 0 0 30px
}

 .takecolor a {
    display: block;
    width: 16px;
    height: 16px;
    float: left
}

.dmopacity {
    float: right;
    border-left: 1px solid #d3d3d3;
    padding-left: 22px
}
 .dragbar {
    width: 85px;
    height: 10px;
    background: #d3d3d3;
    position: relative;
    margin-bottom: 10px;
    cursor: default
}

.dragbar .progress {
    width: 50%;
    position: absolute;
    height: 10px;
    top: 0;
    left: 0;
    background: #39f
}

.dragbar .icon {
    width: 4px;
    height: 16px;
    position: absolute;
    top: -3px;
    left: 50%;
    background: #007cf7
}

.percent {
    width: 85px;
    text-align: center;
    display: block;
    color: #39f
}

View Code

3、进度条百分比实现

<script>
dragbar(85);
function dragbar( barwidth){
//var $box = $('.dragbar');
        var $bg = $('.dragbar');
        var $bgcolor = $('.progress');
        var $btn = $('.icon');
        var $text = $('.percent');
        var statu = false;
        var ox = 0;
        var lx = 0;
        var left = 0;
        var bgleft = 0;
        $btn.mousedown(function(e) {
            lx = $btn.offset().left; //距离浏览器左边的距离
            ox = e.pageX - left;
            statu = true;
        });
        $(document).mouseup(function() {
            statu = false;
        });
        $bg.mousemove(function(e) {
            if (statu) {
                left = e.pageX - ox;
                if (left < 0) {
                    left = 0;
                }
                if (left > barwidth) {
                    left = barwidth;
                }
                $btn.css('left', left);
                $bgcolor.width(left);
                $text.html(parseInt(left / barwidth*100) + '%');
            }
        });
        $bg.click(function(e) {
            if (!statu) {
                bgleft = $bg.offset().left;
                left = e.pageX - bgleft;
                if (left < 0) {
                    left = 0;
                }
                if (left > barwidth) {
                    left = barwidth;
                }
                $btn.css('left', left);
                $bgcolor.stop().animate({
                     left
                }, barwidth);
                $text.html(parseInt(left / barwidth*100) + '%');
            }
        });
}

</script>

本文作者starof,因知识本身在变化，作者也在不断学习成长，文章内容也不定时更新，为避免误导读者，方便追根溯源，请诸位转载注明出处：http://www.cnblogs.com/starof/p/5443445.html有问题欢迎与我讨论，共同进步。

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原文地址：https://www.cnblogs.com/starof/p/5604264.html