markdown CSS_Attention_width_height_refer

Posted 2021-05-06

SCSS code
画一张有关height/width 这种的脑图
需要深究: 要考虑到container1 container2 还有相关的position: relative 和 static对height的影响(实测有关)
生效:
```css
.container {
  background: black;
  width: 20vw;
  height: 50vh;
  .child {
    background: #555;
    width: 20vw;
    height: 100%;
  }
}
```


失效:
```css
.container {
  
  .child {
    
  }
}
```