javascript - CSS/JavaScript : How to draw minimal border around an inline element?

Question

考虑以下 HTML:

<p>This is a potentially large paragraph of text, which <span>may get 
wrapped onto several lines when displayed in the browser.
I would like to be able to draw a minimal</span> box round the span</p>

我想在跨度周围绘制一个最小边框。

即:

• 如果span在单行上渲染，border相当于设置了一个css样式的border: 1px solid black;
• 如果跨度呈现在多行上，则边框绘制在跨度的最外边缘周围，而不是跨度之间。这相当于在 span 上设置 CSS 背景颜色，并在突出显示区域的边缘绘制线条。

我非常有信心这不能单独使用原始 CSS 来完成(在第二种情况下)。涉及 javascript 库或特定于 Firefox 的解决方案是可以接受的。

这是第二种情况的模型:

Answer 1

考虑添加轮廓，而不是边框​​ http://jsfiddle.net/tarabyte/z9THQ/

span {
  outline: 2px solid black;   
}

Firefox 在线条之间绘制轮廓。有一个解决方法:http://jsfiddle.net/z9THQ/2/

.wrapped {
   outline: 2px solid black;
}

.wrapped span {
    border: 1px solid white;
    background-color: white;
    position: relative;
    z-index: 1000;
}

<p>
   This is a potentially large paragraph of text, which 
      <span class="wrapped"><span> 
        may get wrapped onto several lines when displayed in the browser. I would like to be able to draw a minimal
      </span></span> 
   box round the span
</p>