属性 --
box-sizing:border-box;允许你以某种方式定义某些元素,以适应指定区域。https://blog.youkuaiyun.com/sunraining1/article/details/111965768
position:https://blog.youkuaiyun.com/sunraining1/article/details/111965987
display:https://blog.youkuaiyun.com/sunraining1/article/details/111966095
flex:http://www.ruanyifeng.com/blog/2015/07/flex-grammar.html
http://static.vgee.cn/static/index.html(更清楚的说明)
flex:0 : https://blog.youkuaiyun.com/qq_40138556/article/details/103967529
white-space: nowrap; 规定段落中的文本不进行换行:(开发中遇到v-for文字会换行,加上就不换行)
flex-wrap: wrap; 让弹性盒元素在必要的时候拆行: (开发中遇到v-for组件宽度不固定时不换行,加上就会换行)