Sparetire
2018-08-16 11:47:02 +08:00
随手写个 demo 吧
```html
<div class="a">
<div class="b">
<div class="c"></div>
</div>
</div>
```
```css
.a {
width: 100px;
height: 100px;
padding: 10px;
margin: 10px;
border: 10px solid #000;
transform: translate(0, 0);
}
.b {
width: 50px;
height: 50px;
margin: 5px;
padding: 5px;
border: 5px solid #000;
}
.c {
width: 20%;
height: 20px;
border: 1px solid #000;
position: absolute;
}
```
我觉得看完能准确说出 c 的宽度算熟悉 CSS 吧, 勉强也说精通也行吧, 不然我觉得连基本的布局都写不好的就还是算了吧