【微信小程序】利用CSS绘制扇形

CSS：

.triangle-down {
     
  width: 0;
  height: 0;
  color: white;
  text-align: center;
  border-left: 10rpx solid transparent;
  border-right: 10rpx solid transparent;
  border-top: 10rpx solid rgba(51, 55, 69, 1);
  margin-left:20rpx;
  border-top-left-radius: 8rpx;
  border-top-right-radius: 8rpx;
}

wxml：

<view class="triangle-down"></view>

效果：