Question

我想使用单个div元素和css伪元素（如::before）制作费率星级进度条。

我唯一不能做的是用Javascript操纵::before元素的宽度。

以下是我的例子：

.review-rate {
	background-image: url(data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABQAAAAkCAIAAAAGkY33AAACp0lEQVRIx6VVz29MURQeC5UQ/AHCAgv+AT9KRBGNBSsre0IiQVjYCLGpiDFl0UqxaqdaDQkVGWVU40eGEtFFabWNVlKJtNMgmtJ2Pt9597575973XtPEyVmc851z5t53zrnfpBCV4TweHUK2Ek2bRGnQJRiRlOONf0TbHnSeQrHPwekSZIgJ8cVfu9C4EcV+JEnxMxo3YORZpHj8k9xwasLJHn2Nb28chAlNm835qriElh1S78mdvbi7L3J+H1qqpEQXf3mM/DE/6eeIVFJpeMJkluji3EF8/+BnvDiLgfuiNDxhMkt0cfM2jb67ipvr0bpLlHebnRaloRCGmKAkuyUsvrVdQzNTaD+AwoWYVhNkiAlKgpKgWBpgpISu0+g4olqiEboELQLZHP/aRpq34s8vbdMILukI51rWsB4b+PsbrTvlnO40ui+LQZdgfMO8UQ09ROdJ3NuPV+dFaXA3CcaPSpakyi5J/jjqVmAoF/5WTlyCZkmkW6Wy9Rzrtev5vh4/hp0vpEswYT0D4cZz76NLahezP+FhmCd5ezeennD6Jx3qEZChxCdphM1gMxUTcIpUukGH5iSDcia5vhbpClEa82USdvJiKl4ZmotJapclViqtXZrAJFeW+6lkJbbXA5nmMwm3N3rO4AMMtMfg8irKmSSaUb8SpRlRGtGowyTR8Mtz+otoRKP2YXAYCnpyFBODWqcndTENAzJBZTasCYs5TAWlF6E3m7ieDDFBZ1aExRyAvdICFGriaKhGQibNFt9Y53/SaMFnfy/BXttrWGaxJTpDjATjG+aNin9oMvtZPD8jSoNCMH5UsiSVNvA2g8kxtFWHv1UtLkGTQD7wmcSsZ8dhXFvlnEOXYMJ6hkzitH3+D+N/n6THJA2rcWkhMktkkAlM8g8rt+IWmuHa2gAAAABJRU5ErkJggg==);
	background-repeat: repeat-x;
	width: 100px;
	height: 18px;
}
.review-rate::before {
	content: "";
	display: block;
	width: attr(data-width);
	height: 18px;
	width: 55%;
	background-image: url(data:image/png;base64,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);
	background-repeat: repeat-x;
	background-position: 0 -18px;
}

<div class="review-rate" data-toggle="review" data-value="3.5" data-width="50" data-count="17"></div>

有没有办法操纵width元素的::before？

也许像width: attr(data-width);？

任何帮助将不胜感激。

Answer 1

我知道改变:before＆amp;的一种方式动态:after css是@Brett DeWoody提到的，添加样式标记。

在您的情况下，您只需切换:before＆amp;的角色即可。 div。然后使用div宽度而不是:before。像这样：

＆＃13;

.review-rate {
background-image: url("data:image/png;base64,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");
background-position: 0 -18px;
background-repeat: repeat-x;
height: 18px;
overflow: visible;
position: relative;
width: 50px;
}
.review-rate::before {
background-image: url("data:image/png;base64,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");
background-repeat: repeat-x;
content: "";
display: block;
height: 18px;
position: relative;
width: 100px;
z-index: -1;
}

＆＃13;

 <div class="review-rate" data-toggle="review" data-value="3.5" data-width="50" data-count="17"></div>

＆＃13;

Answer 2

虽然它不理想，但您可以使用带有新<style>值的jQuery向页面添加新的width元素。

$('head').append('<style>.review-rate:before{width:75%}</style>');

这里是demo。

<强>更新
正如Imran在下面的评论中所指出的，随着时间的推移，上述方法会产生许多<style>个标签。为防止出现这种情况，可以使用append和replaceWith的组合将<style>标记的数量保持在最低限度。

if ($('head style[data-class="review-rate"]').length) {
    $('head style[data-class="review-rate"]').replaceWith('<style data-class="review-rate">.review-rate:before{width:75%}</style>')       
} else {
    $('head').append('<style data-class="review-rate">.review-rate:before{width:35%}</style>');
}

CSS :: before :: after伪元素动态宽度

2 个答案: