CSS

纯数字或字母溢出不换行

https://blog.csdn.net/hangGe0111/article/details/81001451open in new window

高度不固定无法出现滚动条

https://juejin.cn/post/7096756606959878180open in new window https://juejin.cn/post/6885517239806590984open in new window

移动端点击时产生默认背景色

https://blog.csdn.net/weixin_33132553/article/details/118393964open in new window