BootStrap 适合做什么

Bootstrap 适合做没有界面设计，只有功能或者草图，直接通过代码快速的生成一个可用的界面

Bootstrap 不适合:

1. 已经有了良好的界面设计，包含了各种细节
2. 在已有的非 Bootstrap 的界面上进行改动的时候

居中

• 文本居中可以使用 .text-center 属性.
• Col 居中可以使用 {offset: 2, span: 8} 这种形式.
• 块级元素可以采用 .block-center 属性.
• 不过还是设定 width, 然后 margin: 0 auto 更实用一点.

grid system

container

container class should be added to the root element where you would like to use bootstrap.

container-fluid is for full-width container.

row

from the official documentation:

• Content should be placed within columns, and only columns may be immediate children of rows.
• Columns create gutters (gaps between column content) via padding. That padding is offset in rows for the first and last column via negative margin on .rows.
• Grid classes apply to devices with screen widths greater than or equal to the breakpoint sizes, and override grid classes targeted at smaller devices. grid classes are col-xs-*, col-sm-*, col-md-*, col-lg-*.

| | phone | tablet | desktop | large desktop |
| ————— | ———– | ———- | ———- | ————- |
| Container width | None (auto) | 750px | 970px | 1170px |
| Class prefix | .col-xs- | .col-sm- | .col-md- | .col-lg- |

The gutter width for bootstrap is 15px for each column, 30px between.

generally, you should use the col-sm-N family of classes. such that it applies for all devices except phones.

use col-xs-offset-* classes to offset the columns.

use col-xs-pull-* classes to pull column to left, and push to push to right.

bootstrap 默认已经采用了 border-box 模式。如果需要使用 content-box 需要自己指定。

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