如何在div标签上添加2个有边框的三角形

Question

我有一个div标签，我在div框上添加了一个三角形。如何添加第二个三角形？

我希望有两个三角形，一个用于最佳，一个用于最差，可用于大多数浏览器。

JSFiddle

.arrow_box {
  top: 40px;
  position: relative;
  background: #ffffff;
  border: 1px solid #719ECE;
  width: 200px;
  height: 22px;
  border-radius: 3px;
  -webkit-filter: drop-shadow(0 1px 10px rgba(113, 158, 206, 0.8));
  -moz-box-shadow: 0 1px 10px rgba(113, 158, 206, 0.8);
  filter: drop-shadow(0 1px 10px rgba(113, 158, 206, 0.8));
}

.arrow_box:after,
.arrow_box:before {
  bottom: 100%;
  border: solid transparent;
  content: " ";
  height: 0;
  width: 0;
  position: absolute;
  pointer-events: none;
}

.arrow_box:after {
  border-color: rgba(255, 255, 255, 0);
  border-bottom-color: #ffffff;
  border-width: 19px;
  left: 70%;
  margin-left: -19px;
}

.arrow_box:before {
  border-color: rgba(113, 158, 206, 0);
  border-bottom-color: #719ECE;
  border-width: 20px;
  left: 70%;
  margin-left: -20px;
}

<div id="nicebox" class="arrow_box">
  <span class="pull-left">Best </span>
  <span class="pull-right">Worst</span>
</div>

Answer 1

以下是更新的 Demo

    .arrow_box {
        top:40px;
        position: relative;
        background: #ffffff;
        border: 1px solid #719ECE;
        width: 200px;
        height: 22px;
        border-radius: 3px;
        -webkit-filter: drop-shadow(0 1px 10px rgba(113,158,206,0.8));
        -moz-box-shadow: 0 1px 10px rgba(113,158,206,0.8);
        filter: drop-shadow(0 1px 10px rgba(113,158,206,0.8));
    }
    .arrow_box:after, 
    .arrow_box:before {
        bottom: 100%;
        border: solid transparent;
        content: " ";
        height: 0;
        width: 0;
        position: absolute;
        pointer-events: none;
    }
    
    .arrow_box:after {
        border-color: rgba(255, 255, 255, 0);
        border-bottom-color: #719ECE;
        border-width: 19px;
        right: 0%;
        /* margin-left: -10px; */
    }
    .arrow_box:before {
        border-color: rgba(113, 158, 206, 0);
        border-bottom-color: #719ECE;
        border-width: 20px;
        left: 10%;
        margin-left: -20px;
    }

    <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css" crossorigin="anonymous">
    <div id="nicebox" class="arrow_box">
		<a href="logout.php"></a>

	  <span class="pull-left"><i class="fa fa-long-arrow-up" aria-hidden="true"></i>Best </span> 
			  <span class="pull-right">Worst</span> 
    </div>