用css画三角形

效果实现:

css代码:

.trangle {
  position: fixed;
  top: 0rpx;
  right: 142rpx;
  width: 0rpx;
  height: 0rpx;
  z-index: 2000;
  border-top: 16rpx solid transparent;
  border-right: 16rpx solid #fff;
  border-bottom: 16rpx solid transparent;
  transform: rotate(90deg);
}

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转载自blog.csdn.net/liya_nan/article/details/83110265