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Bootstrap uses some HTML5 elements and CSS properties, so it needs to use the HTML5 document type.
<!DOCTYPE html> <html lang="zh-CN"> ... </html>
In order to make the website developed by Bootstrap mobile-friendly and ensure proper drawing and touch screen scaling, you need to add the viewport meta tag to the head of the web page, as shown below:
<meta name="viewport" content="width=device-width, //视口宽度为设备宽度 initial-scale=1.0, //缩放程度 maximum-scale=1.0, //最大缩放级别(可选) user-scalable=no">//禁止页面缩放(可选)
Bootstrap uses Normalize to establish cross-browser consistency. Normalize.css is a small CSS file that provides better cross-browser consistency in the default styling of HTML elements.
About layout
Bootstrap provides a responsive, mobile-first fluid grid system that is automatically divided into up to 12 columns as the screen or viewport size increases.
img-responsive is used for img elements
container element used to wrap content on the page
<div class="container"> <div class="row"> <div class="col-xs-6 col-md-2 col-md-offset-1"></div> <div class="col-xs-6 col-md-3"></div> <div class="col-xs-6 col-md-3"></div> <div class="col-xs-6 col-md-3"></div> </div> <div class="row">...</div> </div> <div class="container">.... <!--以上代码在手机上就是两行两列,在电脑上是一行四列,其中第一列前面有空白,比其它列宽度小三分之一--> //可使用.col-md-push-* 和 .col-md-pull-* 这种类设定显示,col-md-push-6按照我个人的理解,是在左面浮动了6列,然后再插入元素,col-md-pull-3则是在右边浮动了3列,然后从右往左插入元素
@media (min-width: @screen-sm-min) and (max-width: @screen-sm-max) { ... }
//For all devices with min-width: @screen-sm-min, if the width of the screen is smaller than @screen-sm-max, some processing will be done.
About typesetting
<small>本行内容是在标签内</small><br> <strong>本行内容是在标签内</strong><br> <em>本行内容是在标签内,并呈现为斜体</em><br> <p class="text-left">向左对齐文本</p> <p class="text-center">居中对齐文本</p> <p class="text-right">向右对齐文本</p> <p class="text-muted">本行内容是减弱的</p>灰 <p class="text-primary">本行内容带有一个 primary class</p>蓝 <p class="text-success">本行内容带有一个 success class</p>绿 <p class="text-info">本行内容带有一个 info class</p>深蓝 <p class="text-warning">本行内容带有一个 warning class</p>黄 <p class="text-danger">本行内容带有一个 danger class</p>红
Bootstrap defines the style of the 8a7974376be5f6c00c121222b727adb9 element as a dashed border that appears at the bottom of the text, with the full text appearing when the mouse is hovered over it (as long as you add text for the 8a7974376be5f6c00c121222b727adb9 title attribute). To get a smaller font size for text, add .initialism to 8a7974376be5f6c00c121222b727adb9.
<abbr title="World Wide Web">WWW</abbr><br> <abbr title="Real Simple Syndication" class="initialism">RSS</abbr>
<blockquote>这是一个带有源标题的引用。<small>Someone famous in Source Title</small></blockquote>
About the form
By wrapping any .table in a .table-responsive class, you can make the table scroll horizontally to fit on small devices (less than 768px). You won't see any difference when viewing on large devices larger than 768px wide.
<div class="table-responsive"> <table class="table"> <caption>响应式表格布局</caption> <thead> <tr> <th>产品</th> <th>付款日期</th> <th>状态</th> </tr> </thead> <tbody> <tr> <td>产品1</td> <td>23/11/2013</td> <td>待发货</td> </tr> </tbody> </table> </div>
About the form
<input type="text" class="form-control" placeholder="文本输入"/> <textarea class="form-control" rows="3"></textarea> <label for="name">可多选的选择列表</label> <select multiple class="form-control"> <option>1</option> <option>2</option> <option>3</option> <option>4</option> <option>5</option> </select>
1)设置表单控件padding和margin值
2)改变“form-group”的表现形式,类似于网格系统的“row”。
3)向标签添加 class .control-label。
1)对一系列复选框和单选框使用 .checkbox-inline 或 .radio-inline class,控制它们显示在同一行上。
<input class="form-control" type="text" placeholder=""> <span class="help-block">一个较长的帮助文本块,超过一行, 需要扩展到下一行。本实例中的帮助文本总共有两行。</span>
关于按钮
<button type="button" class="btn btn-default">默认按钮</button> <!-- 提供额外的视觉效果,标识一组按钮中的原始动作 --> <button type="button" class="btn btn-primary">原始按钮</button> <!-- 表示一个成功的或积极的动作 --> <button type="button" class="btn btn-success">成功按钮</button> <!-- 信息警告消息的上下文按钮 --> <button type="button" class="btn btn-info">信息按钮</button> <!-- 表示应谨慎采取的动作 --> <button type="button" class="btn btn-warning">警告按钮</button> <!-- 表示一个危险的或潜在的负面动作 --> <button type="button" class="btn btn-danger">危险按钮</button> <!-- 并不强调是一个按钮,看起来像一个链接,但同时保持按钮的行为 --> <button type="button" class="btn btn-link">链接按钮</button>
按钮的大小
<p> <button type="button" class="btn btn-primary btn-lg"> 大的原始按钮 </button> </p> <p> <button type="button" class="btn btn-primary"> 默认大小的原始按钮 </button> </p> <p> <button type="button" class="btn btn-primary btn-sm"> 小的原始按钮 </button> </p> <p> <button type="button" class="btn btn-primary btn-xs"> 特别小的原始按钮 </button> </p> <p> <button type="button" class="btn btn-primary btn-lg btn-block"> 块级的原始按钮 </button> </p>
在a和input上使用按钮class也能弄成按钮的样子,但是考虑到跨浏览器的问题还是在button上比较好。
关于图片
关于图片的样式除了之前提到的img-responsive用于图片的自适应之外还有以下三个样式:
关于其它样式类
关于不同设备
以上就是Bootstarp中CSS的使用方法,希望大家会喜欢。