如何制作带有边框的纯CSS气泡? [英] How can I make a CSS only speech bubble with a border?

问题描述

我想制作一个仅CSS的气泡.到目前为止，我有这个...

示例

CSS

div {
    position: relative;
    background: #fff;
    padding: 10px;
    font-size: 12px;
    text-align: center;
    -webkit-border-radius: 20px;
    -moz-border-radius: 20px;
    border-radius: 20px;
}

div:after {
    content: "";
    display: block;
    width: 0;
    height: 0;
    position: absolute;
    left: 50%;
    bottom: -60px;
    margin-left: -15px;
    border-width: 30px 20px 30px 20px;
    border-style: solid;
    border-color: #fff transparent transparent transparent;
}

jsFiddle .

...这几乎是我想要的.但是，我希望整个物体周围都有一个浅色边框.

很明显，在主要部分上，只需将border: 1px solid #333添加到div即可.

但是，由于气泡的尾巴是 border hack ，因此我无法为其添加边框.

我尝试将框阴影设置为0 0 1px #333，但是浏览器将边框应用于元素的矩形形状(我想这是他们应该要做的事情).

jsFiddle .

我的下一个想法是找到一个看起来像气泡尾巴的Unicode字符并将其绝对定位在其中，以text-shadow为边框，并使用主气泡的z-index隐藏文本的顶部阴影.

哪种Unicode字符适合于此?我应该做些不同的事情吗?我需要求助于图像吗?

我只需要支持Mobile Safari. :)

解决方案

<div>Hello Stack Overflow!<span></span></div>

div span:after {
    content: "";
    display: block;
    width: 0;
    height: 0;
    position: absolute;
    left: 50%;
    bottom: -51px;
    margin-left: -15px;
    border-width: 20px 20px 30px 20px;
    border-style: solid;
    border-color: #000 transparent transparent transparent;
}

http://jsfiddle.net/QYH5a/

I want to make a CSS only speech bubble. So far, I have this...

Example

CSS

div {
    position: relative;
    background: #fff;
    padding: 10px;
    font-size: 12px;
    text-align: center;
    -webkit-border-radius: 20px;
    -moz-border-radius: 20px;
    border-radius: 20px;
}

div:after {
    content: "";
    display: block;
    width: 0;
    height: 0;
    position: absolute;
    left: 50%;
    bottom: -60px;
    margin-left: -15px;
    border-width: 30px 20px 30px 20px;
    border-style: solid;
    border-color: #fff transparent transparent transparent;
}

jsFiddle.

...which is almost exactly what I want. However, I want a light border around the whole thing.

Obviously, on the main portion, that is simple as adding border: 1px solid #333 to the div.

However, as the tail of the bubble is a border hack, I can't user a border with it.

I tried setting a box shadow of 0 0 1px #333 but browsers apply the border to the rectangular shape of the element (which I guess is what they should do).

jsFiddle.

My next thoughts were finding a Unicode character that looks like a bubble tail and absolutely positioning it there, with text-shadow for the border and using z-index of the main bubble to hide the top shadow of the text.

What Unicode character would be suitable for this? Should I do something different? Do I need to resort to an image?

I only have to support Mobile Safari. :)

解决方案

<div>Hello Stack Overflow!<span></span></div>

div span:after {
    content: "";
    display: block;
    width: 0;
    height: 0;
    position: absolute;
    left: 50%;
    bottom: -51px;
    margin-left: -15px;
    border-width: 20px 20px 30px 20px;
    border-style: solid;
    border-color: #000 transparent transparent transparent;
}

http://jsfiddle.net/QYH5a/

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