Bootstrap front-end development framework
Recommended learning URL
- Chinese official website: http://www.bootcss.com/
- Official website: http://getbootstrap.com
- Recommended Use：http://bootstrap.css88.com/
Bootstrap use
1. Suggested directory structure
2. HTML skeleton
<html>
<head>
<meta charset="utf-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1">
<!--[if lt IE 9]>
<script src="https://cdn.jsdelivr.net/npm/[email protected]/dist/html5shiv.min.js"></script>
<script src="https://cdn.jsdelivr.net/npm/[email protected]/dest/respond.min.js"></script>
<![endif]-->
<link href="https://cdn.jsdelivr.net/npm/[email protected]/dist/css/bootstrap.min.css" rel="stylesheet">
</head>
<body>
内容
<script src="https://cdn.jsdelivr.net/npm/[email protected]/dist/js/bootstrap.min.js"></script>
</body>
</html>
3. Raster prefix classification
| ~ | Ultra small screen (mobile phone) <768px |
Small screen device (tablet) >=768px |
Medium screen (PC) >=992px |
Widescreen device >=1200px |
|---|---|---|---|---|
| .container maximum width | Automatic (100%) | 750px | 970px | 1170px |
| Class prefix | .col-xs- | .col-sm- | .col-md- | .col-lg- |
4. Grid nested table (pay attention to details)
<div class="row">
<div class="col-md-4">
<!-- 最好增加row行，这样可以取消父元素的padding，且高度和父级一样 -->
<div class="row">
<!-- 也是将父容器分12等分 -->
<div class="col-md-6">a</div>
<div class="col-md-6">b</div>
</div>
</div>
<div class="col-md-4">2</div>
<div class="col-md-4">3</div>
</div>
5. Grid-column offset
<div class="container">
<div class="row">
<div class="col-md-4">左侧</div>
<div class="col-md-4 col-md-offset">右侧</div>
</div>
<div class="row">
<div class="col-md-8 col-md-offset-2">中间</div>
</div>
</div>
6. Grid-column sorting
<div class="container">
<div class="row">
<!-- 将左侧的盒子-推到右侧8个位置 -->
<div class="col-md-4 col-md-push-8">左侧</div>
<!-- 将右侧的盒子-拉回右侧4个位置 -->
<div class="col-md-4 col-md-pull-4">右侧</div>
</div>
</div>
7. Responsive tools
| Class name | Hide screen size |
|---|---|
| .hidden-xs | Ultra small screen |
| .hidden-sm | Small screen |
| .hidden-md | Middle screen |
| .hidden-lg | Big screen |
Instead, the class name: visible-xs visible-sm visible-md visible-lg
8. Modify the maximum width of the container to 1280px
@media screen and (min-width:1280px){
.container{
width: 1280px;
}
}
9. Use of icons
// 直接复制图标编码到对应元素
<div class="nav">
<a href="#" class="glyphicon glyphicon-camera">照相机</a>
</div>
The effect is as follows:
adjust the style:
.nav a::before{
vertical-align: middle;
padding-right: 5px;
}
The effect is as follows:
