这种css命名规则是什么？

Question

<style>
  .user {
    width: 100rpx;
    height: 100rpx;
    position: relative;
  }
  .user__avatar {
    display: block;
    width: 100rpx;
    height: 100rpx;
    border-radius: 50%;
  }
  .user__un-read-msg-count {
    position: absolute;
    top: -16rpx;
    right: -8rpx;
  }
</style>

Answer 1

这个是bem规范
bem