59

创建一个使用 CSS 向左侧绘制三角形的 DIV。尝试将统一的 box-shadow 应用于父元素和伪元素(参见图片)和代码。

这可能吗?或者我最好为此使用边框图像?

(顶部:阴影之前,中间:CSS Box-Shadow,底部:所需结果)

添加 Box-Shadow 之前的元素

添加了 box-shadow 的元素

想要的结果

.bubble{
    height: 200px;
    width:  275px;

    opacity: 0;

    margin-top: 41px;

    float: right;

    background-color: #F2F2F2;

    -webkit-border-radius: 5px;
    -webkit-box-shadow: 0px 0px 6px #B2B2B2;
}

.bubble::after {
        height: 0px;
        width:  0px;

        content: "\00a0";

        display: block;

        margin-left: -10px;
        margin-top:   28px;

        border-width: 10px 10px 10px 0;
        border-style: solid;
        border-color: transparent #F2F2F2 transparent transparent;

        -webkit-box-shadow: 0px 0px 6px #B2B2B2;
    }
4

5 回答 5

119

您可以使用旋转 divtransform并获得真实的box-shadow. 由于您只想要 div 一侧(可见三角形一侧)的阴影,因此您必须bluropacity.

演示:http: //jsfiddle.net/ThinkingStiff/mek5Z/

HTML:

<div class="bubble"></div>

CSS:

.bubble{
    background-color: #F2F2F2;
    border-radius: 5px;
    box-shadow: 0px 0px 6px #B2B2B2;
    height: 200px;
    margin: 20px;
    width:  275px;
}

.bubble::after {
    background-color: #F2F2F2;
    box-shadow: -2px 2px 2px 0 rgba( 178, 178, 178, .4 );
    content: "\00a0";
    display: block;
    height: 20px;
    left: -10px;
    position: relative;
    top: 20px;
    transform:             rotate( 45deg );
        -moz-transform:    rotate( 45deg );
        -ms-transform:     rotate( 45deg );
        -o-transform:      rotate( 45deg );
        -webkit-transform: rotate( 45deg );
    width:  20px;
}

输出:

在此处输入图像描述

于 2012-01-15T04:59:54.010 回答
8

这是一个完整的 (S)CSS 中的完整工作示例,带有鼻子大小阴影宽度和可选边框的变量。

诀窍是获得偏移并正确转换以实现像素完美,并overflow:hidden根据需要使用来切割气泡的鼻子(特别是如果您需要边框)。

上面答案中的示例对我们不起作用,因为阴影被裁剪并覆盖在主气泡区域上。

在 IE7/8 中优雅地降级。

HTML:

<div class="chat">
    <div class="bubble">
        <span class='tail'>&nbsp;</span>
        <p>The path of the righteous man is beset on all sides by the iniquities of the selfish and the tyranny of evil men. Blessed is he who, in the name of charity and good will, shepherds the weak through the valley of darkness, for he is truly his brother's keeper and the finder of lost children.</p><p>And I will strike down upon thee with great vengeance and furious anger those who would attempt to poison and destroy My brothers. And you will know My name is the Lord when I lay My vengeance upon thee.</p>
    </div>
</div>

SCSS:

$shadow_radius = 6px;
$nose_size = 12px;
$shadow = 0 1px $shadow_radius #B2B2B2;
$border =  1px solid #bbb

.chat {
    font-family:      sans-serif;
    font-size:        small;
}

.bubble {
    background-color: #F2F2F2;
    border-radius:    5px;
    border:           $border;
    box-shadow:       $shadow;
    display:          inline-block;
    padding:          10px 18px;
    margin-left:     ($shadow_radius + $nose_size);
    margin-right:    ($shadow_radius + $nose_size);
    position:         relative;
    vertical-align:   top;
}

.tail {
    position: absolute;
    top:      $nose_size;
    left:   -($shadow_radius + $nose_size);
    height:  ($shadow_radius + $nose_size);
    width:   ($shadow_radius + $nose_size);
    overflow: hidden;
}
.tail:before {
    border:            $border;
    background-color:  #F2F2F2;
    box-shadow:        $shadow;
    content:           "\00a0";

    display:           block;
    position:          absolute;
    top:               0px;
    left:              $nose_size;
    height:            $nose_size;
    width:             $nose_size;
    -webkit-transform: skew( -45deg );
    -moz-transform:    skew( -45deg );
}
于 2012-10-22T16:11:33.457 回答
5

另一种解决方案是使用filter: drop-shadow(0 1px 2px rgba(0,0,0,.5));它只在对象形状周围放置阴影。

于 2014-10-02T17:20:08.050 回答
4

我知道这有点棘手,但对我来说似乎很好。这是小提琴http://jsfiddle.net/dzfj6/

HTML

<div class="bubble">
    <div class="triangle"></div>
    <div class="border"></div>
    <div class="content">some content</div>
</div>

CSS

.bubble
{
    height: 200px;
    width:  275px;
    float:right;
    margin-top: 41px;
    margin-left:11px;
    background-color: #f2f2f2;
    -webkit-border-radius: 5px;
    -webkit-box-shadow: 0px 0px 5px #b2b2b2;
    position:relative;
    z-index:1;
}

.triangle
{
   position:absolute;
   top:12px;
   width: 0;
   height: 0;
   border-top: 15px solid transparent;
   border-bottom: 15px solid transparent;
   border-right: 10px solid #f2f2f2;
   margin-left:-9px;
   z-index:3;
}
.border
{        
   position:absolute;
   top:12px;
   width: 0;
   height: 0;
   border-top: 15px solid transparent;
   border-bottom: 15px solid transparent;
   border-right: 10px solid #e0e0e0;
   margin-left:-10px;
   z-index:2;
}

.content{
   padding:10px;
}

而不是box-shadow,您可以简单地使用borderfor buble。

于 2012-01-15T02:45:17.747 回答
-4

不要使用box-shadow.

 height: 200px;
    width:  275px;
    float:right;
    margin-top: 41px;
    margin-left:11px;
    background-color: #f2f2f2;
    -webkit-border-radius: 5px;
    -webkit-box-shadow: 0px 0px 5px #b2b2b2;
    position:relative;
    z-index:1;
于 2012-08-15T10:48:57.977 回答