# 容器container 應用
## 一、基本概念
* 要用 Bootstrap 的網格系統來排版，一定要使用容器（container）
* 頁面中可有多個容器，容器可巢狀使用（容器中還有容器）
* 容器有兩種，一種是寬度有上限的容器：
```markup
```
* 一種是全螢幕容器：
```markup
```
* 沒加容器之前。網頁內容會緊貼著邊緣，加上之後，預設就有邊距出現
* 可參考 ：
---
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