2017-09-01 73 views
0

我有一个问题,我有图表动画,一切看起来不错,但...我想这个代码只会触发一个,但在每次向下滚动或向上滚动图表时都会重新开始。看,每个卷轴上的百分比描述重新开始。是否只有先滚动才能激活此代码?谢谢大家帮忙窗口滚动只有一个火

$(window).scroll(function() { 
 
    if ($(this).scrollTop() >= $('.holder').offset().top) { 
 
     $('.bar').each(function(i) { 
 
      var $bar = $(this); 
 
      $(this).append('<span class="count"></span>') 
 
      setTimeout(function() { 
 
       $bar.css('width', $bar.attr('data-percent')); 
 
      }, i * 100); 
 
     }); 
 

 
     $('.count').each(function() { 
 
      $(this).prop('Counter', 0).animate({ 
 
       Counter: $(this).parent('.bar').attr('data-percent') 
 
      }, { 
 
       duration: 2000, 
 
       easing: 'swing', 
 
       step: function(now) { 
 
        $(this).text(Math.ceil(now) + '%'); 
 
       } 
 
      }); 
 
     }); 
 
    } 
 
})
@import url(http://fonts.googleapis.com/css?family=Droid+Serif:400, 400italic|Montserrat:400, 700); 
 
html, body, div, span, applet, object, iframe, h1, h2, h3, h4, h5, h6, p, blockquote, pre, a, abbr, acronym, address, big, cite, code, del, dfn, em, img, ins, kbd, q, s, samp, small, strike, strong, sub, sup, tt, var, b, u, i, center, dl, dt, dd, ol, ul, li, fieldset, form, label, legend, table, caption, tbody, tfoot, thead, tr, th, td, article, aside, canvas, details, embed, figure, figcaption, footer, header, hgroup, menu, nav, output, ruby, section, summary, time, mark, audio, video { 
 
    margin: 0; 
 
    padding: 0; 
 
    border: 0; 
 
    font: inherit; 
 
    font-size: 100%; 
 
    vertical-align: baseline; 
 
} 
 
html { 
 
    line-height: 1; 
 
} 
 
ol, ul { 
 
    list-style: none; 
 
} 
 
table { 
 
    border-collapse: collapse; 
 
    border-spacing: 0; 
 
} 
 
caption, th, td { 
 
    text-align: left; 
 
    font-weight: normal; 
 
    vertical-align: middle; 
 
} 
 
q, blockquote { 
 
    quotes: none; 
 
} 
 
q:before, q:after, blockquote:before, blockquote:after { 
 
    content:""; 
 
    content: none; 
 
} 
 
a img { 
 
    border: none; 
 
} 
 
article, aside, details, figcaption, figure, footer, header, hgroup, main, menu, nav, section, summary { 
 
    display: block; 
 
} 
 
* { 
 
    box-sizing: border-box; 
 
} 
 
body { 
 
    color: #333; 
 
    -webkit-font-smoothing: antialiased; 
 
    font-family:"Montserrat", sans-serif; 
 
    padding: 2%; 
 
} 
 
.wrap { 
 
    width: 50%; 
 
    margin: 0 auto; 
 
} 
 
h1 { 
 
    font-family:"Montserrat", sans-serif; 
 
    font-weight: bold; 
 
    text-align: center; 
 
    font-size: 1.5em; 
 
    padding: .5em 0; 
 
    margin-bottom: 1em; 
 
    border-bottom: 1px solid #dadada; 
 
    letter-spacing: 3px; 
 
    text-transform: uppercase; 
 
} 
 
ul li { 
 
    line-height: 2; 
 
    font-weight: bold; 
 
    font-family:"Montserrat", sans-serif; 
 
    font-size: .85em; 
 
    text-transform: uppercase; 
 
    clear: both; 
 
} 
 
ul li:before { 
 
    content:"\2023"; 
 
    padding: 0 1em 0 0; 
 
} 
 
.bar { 
 
    background: #e74c3c; 
 
    width: 0; 
 
    margin: .25em 0; 
 
    color: #fff; 
 
    position: relative; 
 
    transition: width 2s, background .2s; 
 
    clear: both; 
 
} 
 
.bar:nth-of-type(2n) { 
 
    background: #ed7669; 
 
} 
 
.bar .label { 
 
    font-size: .75em; 
 
    padding: 1em; 
 
    background: #3d3d3d; 
 
    width: 8em; 
 
    display: inline-block; 
 
    position: relative; 
 
    z-index: 2; 
 
    font-weight: bold; 
 
    font-family:"Montserrat", sans-serif; 
 
} 
 
.bar .label.light { 
 
    background: #575757; 
 
} 
 
.count { 
 
    position: absolute; 
 
    right: .25em; 
 
    top: .75em; 
 
    padding: .15em; 
 
    font-size: .75em; 
 
    font-weight: bold; 
 
    font-family:"Montserrat", sans-serif; 
 
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script> 
 
<div class="wrap"> 
 
    <h1>Animated Bar Graphs</h1> 
 

 
    <div class="holder"> 
 
     <div class="bar cf" data-percent="85%"><span class="label">Photoshop</span> 
 
     </div> 
 
     <div class="bar cf" data-percent="75%"><span class="label light">Illustrator</span> 
 
     </div> 
 
     <div class="bar cf" data-percent="65%"><span class="label">Indesign</span> 
 
     </div> 
 
     <div class="bar cf" data-percent="90%"><span class="label light">HTML</span> 
 
     </div> 
 
     <div class="bar cf" data-percent="90%"><span class="label">CSS</span> 
 
     </div> 
 
     <div class="bar cf" data-percent="80%"><span class="label light">jQuery</span> 
 
     </div> 
 
     <div class="bar cf" data-percent="85%"><span class="label light">RWD</span> 
 
     </div> 
 
     <div class="bar cf" data-percent="75%"><span class="label">PHP</span> 
 
     </div> 
 
     <div class="bar cf" data-percent="80%"><span class="label light">WordPress</span> 
 
     </div> 
 
     <div class="bar cf" data-percent="70%"><span class="label">SASS/SCSS</span> 
 
     </div> 
 
    </div> 
 
</div>

回答

1

你的脚本就追加一个spanholder股利。所以请检查它是否已经spancount类。如果是这样,继续。

$(window).on("scroll", function() { 
 
    if ($(this).scrollTop() >= $('.holder').offset().top) { 
 
     $('.bar').each(function(i) { 
 
      var $bar = $(this); 
 
      if($(this).find('span.count').length !== 0) return; 
 
    
 
      console.log("span is added"); 
 

 
      $(this).append('<span class="count"></span>') 
 
      setTimeout(function() { 
 
       $bar.css('width', $bar.attr('data-percent')); 
 
      }, i * 100); 
 
      $(window).off('scroll'); 
 
     }); 
 

 
     $('.count').each(function() { 
 
      $(this).prop('Counter', 0).animate({ 
 
       Counter: $(this).parent('.bar').attr('data-percent') 
 
      }, { 
 
       duration: 2000, 
 
       easing: 'swing', 
 
       step: function(now) { 
 
        $(this).text(Math.ceil(now) + '%'); 
 
       } 
 
      }); 
 
     }); 
 
    } 
 
})
@import url(http://fonts.googleapis.com/css?family=Droid+Serif:400, 400italic|Montserrat:400, 700); 
 
html, body, div, span, applet, object, iframe, h1, h2, h3, h4, h5, h6, p, blockquote, pre, a, abbr, acronym, address, big, cite, code, del, dfn, em, img, ins, kbd, q, s, samp, small, strike, strong, sub, sup, tt, var, b, u, i, center, dl, dt, dd, ol, ul, li, fieldset, form, label, legend, table, caption, tbody, tfoot, thead, tr, th, td, article, aside, canvas, details, embed, figure, figcaption, footer, header, hgroup, menu, nav, output, ruby, section, summary, time, mark, audio, video { 
 
    margin: 0; 
 
    padding: 0; 
 
    border: 0; 
 
    font: inherit; 
 
    font-size: 100%; 
 
    vertical-align: baseline; 
 
} 
 
html { 
 
    line-height: 1; 
 
} 
 
ol, ul { 
 
    list-style: none; 
 
} 
 
table { 
 
    border-collapse: collapse; 
 
    border-spacing: 0; 
 
} 
 
caption, th, td { 
 
    text-align: left; 
 
    font-weight: normal; 
 
    vertical-align: middle; 
 
} 
 
q, blockquote { 
 
    quotes: none; 
 
} 
 
q:before, q:after, blockquote:before, blockquote:after { 
 
    content:""; 
 
    content: none; 
 
} 
 
a img { 
 
    border: none; 
 
} 
 
article, aside, details, figcaption, figure, footer, header, hgroup, main, menu, nav, section, summary { 
 
    display: block; 
 
} 
 
* { 
 
    box-sizing: border-box; 
 
} 
 
body { 
 
    color: #333; 
 
    -webkit-font-smoothing: antialiased; 
 
    font-family:"Montserrat", sans-serif; 
 
    padding: 2%; 
 
} 
 
.wrap { 
 
    width: 50%; 
 
    margin: 0 auto; 
 
} 
 
h1 { 
 
    font-family:"Montserrat", sans-serif; 
 
    font-weight: bold; 
 
    text-align: center; 
 
    font-size: 1.5em; 
 
    padding: .5em 0; 
 
    margin-bottom: 1em; 
 
    border-bottom: 1px solid #dadada; 
 
    letter-spacing: 3px; 
 
    text-transform: uppercase; 
 
} 
 
ul li { 
 
    line-height: 2; 
 
    font-weight: bold; 
 
    font-family:"Montserrat", sans-serif; 
 
    font-size: .85em; 
 
    text-transform: uppercase; 
 
    clear: both; 
 
} 
 
ul li:before { 
 
    content:"\2023"; 
 
    padding: 0 1em 0 0; 
 
} 
 
.bar { 
 
    background: #e74c3c; 
 
    width: 0; 
 
    margin: .25em 0; 
 
    color: #fff; 
 
    position: relative; 
 
    transition: width 2s, background .2s; 
 
    clear: both; 
 
} 
 
.bar:nth-of-type(2n) { 
 
    background: #ed7669; 
 
} 
 
.bar .label { 
 
    font-size: .75em; 
 
    padding: 1em; 
 
    background: #3d3d3d; 
 
    width: 8em; 
 
    display: inline-block; 
 
    position: relative; 
 
    z-index: 2; 
 
    font-weight: bold; 
 
    font-family:"Montserrat", sans-serif; 
 
} 
 
.bar .label.light { 
 
    background: #575757; 
 
} 
 
.count { 
 
    position: absolute; 
 
    right: .25em; 
 
    top: .75em; 
 
    padding: .15em; 
 
    font-size: .75em; 
 
    font-weight: bold; 
 
    font-family:"Montserrat", sans-serif; 
 
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script> 
 
<div class="wrap"> 
 
    <h1>Animated Bar Graphs</h1> 
 

 
    <div class="holder"> 
 
     <div class="bar cf" data-percent="85%"><span class="label">Photoshop</span> 
 
     </div> 
 
     <div class="bar cf" data-percent="75%"><span class="label light">Illustrator</span> 
 
     </div> 
 
     <div class="bar cf" data-percent="65%"><span class="label">Indesign</span> 
 
     </div> 
 
     <div class="bar cf" data-percent="90%"><span class="label light">HTML</span> 
 
     </div> 
 
     <div class="bar cf" data-percent="90%"><span class="label">CSS</span> 
 
     </div> 
 
     <div class="bar cf" data-percent="80%"><span class="label light">jQuery</span> 
 
     </div> 
 
     <div class="bar cf" data-percent="85%"><span class="label light">RWD</span> 
 
     </div> 
 
     <div class="bar cf" data-percent="75%"><span class="label">PHP</span> 
 
     </div> 
 
     <div class="bar cf" data-percent="80%"><span class="label light">WordPress</span> 
 
     </div> 
 
     <div class="bar cf" data-percent="70%"><span class="label">SASS/SCSS</span> 
 
     </div> 
 
    </div> 
 
</div>

+0

这是平均水平的解决方案,因为跨度仍然一次又一次地增加。这是非常缓慢的应用程序 –

+0

我希望这个滚动只会发生一次火灾 –

+0

@ V.R不,它不会一再增加。在添加span之前添加一个控制台日志,并查看该行运行的次数。看到我的更新 – Badiparmagi

1

你可以只使用.on和内断开链接的事件:

$(window).on('scroll',function() { 
 
    if ($(this).scrollTop() >= $('.holder').offset().top) { 
 
     $('.bar').each(function(i) { 
 
      var $bar = $(this); 
 
      $(this).append('<span class="count"></span>') 
 
      setTimeout(function() { 
 
       $bar.css('width', $bar.attr('data-percent')); 
 
      }, i * 100); 
 
     }); 
 
     $(window).off('scroll'); 
 
     $('.count').each(function() { 
 
      $(this).prop('Counter', 0).animate({ 
 
       Counter: $(this).parent('.bar').attr('data-percent') 
 
      }, { 
 
       duration: 2000, 
 
       step: function(now) { 
 
        $(this).text(Math.ceil(now) + '%'); 
 
       } 
 
      }); 
 
     }); 
 
    } 
 
});
@import url(http://fonts.googleapis.com/css?family=Droid+Serif:400, 400italic|Montserrat:400, 700); 
 
html, body, div, span, applet, object, iframe, h1, h2, h3, h4, h5, h6, p, blockquote, pre, a, abbr, acronym, address, big, cite, code, del, dfn, em, img, ins, kbd, q, s, samp, small, strike, strong, sub, sup, tt, var, b, u, i, center, dl, dt, dd, ol, ul, li, fieldset, form, label, legend, table, caption, tbody, tfoot, thead, tr, th, td, article, aside, canvas, details, embed, figure, figcaption, footer, header, hgroup, menu, nav, output, ruby, section, summary, time, mark, audio, video { 
 
    margin: 0; 
 
    padding: 0; 
 
    border: 0; 
 
    font: inherit; 
 
    font-size: 100%; 
 
    vertical-align: baseline; 
 
} 
 
html { 
 
    line-height: 1; 
 
} 
 
ol, ul { 
 
    list-style: none; 
 
} 
 
table { 
 
    border-collapse: collapse; 
 
    border-spacing: 0; 
 
} 
 
caption, th, td { 
 
    text-align: left; 
 
    font-weight: normal; 
 
    vertical-align: middle; 
 
} 
 
q, blockquote { 
 
    quotes: none; 
 
} 
 
q:before, q:after, blockquote:before, blockquote:after { 
 
    content:""; 
 
    content: none; 
 
} 
 
a img { 
 
    border: none; 
 
} 
 
article, aside, details, figcaption, figure, footer, header, hgroup, main, menu, nav, section, summary { 
 
    display: block; 
 
} 
 
* { 
 
    box-sizing: border-box; 
 
} 
 
body { 
 
    color: #333; 
 
    -webkit-font-smoothing: antialiased; 
 
    font-family:"Montserrat", sans-serif; 
 
    padding: 2%; 
 
} 
 
.wrap { 
 
    width: 50%; 
 
    margin: 0 auto; 
 
} 
 
h1 { 
 
    font-family:"Montserrat", sans-serif; 
 
    font-weight: bold; 
 
    text-align: center; 
 
    font-size: 1.5em; 
 
    padding: .5em 0; 
 
    margin-bottom: 1em; 
 
    border-bottom: 1px solid #dadada; 
 
    letter-spacing: 3px; 
 
    text-transform: uppercase; 
 
} 
 
ul li { 
 
    line-height: 2; 
 
    font-weight: bold; 
 
    font-family:"Montserrat", sans-serif; 
 
    font-size: .85em; 
 
    text-transform: uppercase; 
 
    clear: both; 
 
} 
 
ul li:before { 
 
    content:"\2023"; 
 
    padding: 0 1em 0 0; 
 
} 
 
.bar { 
 
    background: #e74c3c; 
 
    width: 0; 
 
    margin: .25em 0; 
 
    color: #fff; 
 
    position: relative; 
 
    transition: width 2s, background .2s; 
 
    clear: both; 
 
} 
 
.bar:nth-of-type(2n) { 
 
    background: #ed7669; 
 
} 
 
.bar .label { 
 
    font-size: .75em; 
 
    padding: 1em; 
 
    background: #3d3d3d; 
 
    width: 8em; 
 
    display: inline-block; 
 
    position: relative; 
 
    z-index: 2; 
 
    font-weight: bold; 
 
    font-family:"Montserrat", sans-serif; 
 
} 
 
.bar .label.light { 
 
    background: #575757; 
 
} 
 
.count { 
 
    position: absolute; 
 
    right: .25em; 
 
    top: .75em; 
 
    padding: .15em; 
 
    font-size: .75em; 
 
    font-weight: bold; 
 
    font-family:"Montserrat", sans-serif; 
 
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script> 
 
<div class="wrap"> 
 
    <h1>Animated Bar Graphs</h1> 
 

 
    <div class="holder"> 
 
     <div class="bar cf" data-percent="85%"><span class="label">Photoshop</span> 
 
     </div> 
 
     <div class="bar cf" data-percent="75%"><span class="label light">Illustrator</span> 
 
     </div> 
 
     <div class="bar cf" data-percent="65%"><span class="label">Indesign</span> 
 
     </div> 
 
     <div class="bar cf" data-percent="90%"><span class="label light">HTML</span> 
 
     </div> 
 
     <div class="bar cf" data-percent="90%"><span class="label">CSS</span> 
 
     </div> 
 
     <div class="bar cf" data-percent="80%"><span class="label light">jQuery</span> 
 
     </div> 
 
     <div class="bar cf" data-percent="85%"><span class="label light">RWD</span> 
 
     </div> 
 
     <div class="bar cf" data-percent="75%"><span class="label">PHP</span> 
 
     </div> 
 
     <div class="bar cf" data-percent="80%"><span class="label light">WordPress</span> 
 
     </div> 
 
     <div class="bar cf" data-percent="70%"><span class="label">SASS/SCSS</span> 
 
     </div> 
 
    </div> 
 
</div>