如何在css3中创建箭头？

Question

如何在css3中创建箭头？就像这样.

jsfiddle http://jsfiddle.net/BdSP4/1/

Answer 1

---看看演示----

<div class="triangle-left">
    <div></div>
</div>?

.triangle-left {
  border-color: transparent black transparent transparent;
  border-style: solid;
  border-width: 20px;
  width: 0;
  height: 0;
}

.triangle-left div
{
  border-color: transparent white transparent transparent;
  border-style: solid;
  border-width: 10px;
  width: 0;
  height: 0;
  position:relative;
  top:-9px;
  left:0px;
}?

这是一个三角形,内部有一个白色三角形,呈现出箭头的外观.有关CSS3三角形的更多信息,请参见此处:

http://jonrohan.me/guide/css/creating-triangles-in-css/

Answer 2

见JsFiddle

HTML

<div class="angle"></div>

CSS

.angle:after { /* Thanks to :after just one div is necessary */
    content: '.';
    border-top: 20px solid #000; /* NW triangle gap */
    border-bottom: 20px solid #000; /* SW triangle gap */
    border-left: none;
    border-right: 20px solid transparent; /* W triangle */
    position: relative;
    left: 20px;
}
.angle {
    font-size: 0px; line-height: 0%; width: 0px; /* Necessary to not screw up the layout */
    border-top: 20px solid transparent; /* NE triangle gap */
    border-bottom: 20px solid transparent; /* SE triangle gap */
    border-left: none;
    border-right: 20px solid #000; /* E triangle */
}

更新:较小的版本

这些是2个重叠的三角形.一个是黑色,一个是白色.

的jsfiddle

相同的HTML,不同的CSS

.angle:after {
    content: '.';
    border-top: 10px solid transparent; 
    border-bottom: 10px solid transparent;
    border-left: none;
    border-right: 10px solid white; 
    position: relative;
    left: 5px;
}
.angle {
    font-size: 0px; line-height: 0%; width: 0px; /* Necessary to not screw up the layout */
    border-top: 10px solid transparent;
    border-bottom: 10px solid transparent;
    border-left: none;
    border-right: 10px solid #000;
}