First contact with Bootstrap framework-PHP开发-php.cn

First contact with Bootstrap framework

高洛峰

Release： 2016-12-09 11:57:26

Original

2009 people have browsed it

About Bootstrap, not much to say, let’s go directly to the topic:

Installation

can be downloaded and installed through the bootstrap official website

can be installed through Bower (about bower, a package manager, this article will not explain it in detail)

bower install bootstrap

can be installed through npm (you can read about npm)

npm install bootstrap

Introduced Bootstrap

<!DOCTYPE html>
<html lang="en">
<head>
 <meta charset="UTF-8">
 <title>BootstrapDemo</title>
 <!--step1:设置viewport-->
 <meta name="viewport" content="width=device-width,initial-scale=1.0,user-scalable=no">
 <!--step2:引入Bootstrap-->
 <link rel="stylesheet" href="css/bootstrap.css">
</head>

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into the project

layout container

.container class is used for containers with fixed width and supporting responsive layout

<div class="container">
 
</div>

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.container-fluid class is used for containers with 100% width and occupy the entire viewport

<div class="container-fluid">
 
</div>

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Grid system

Bootstrap provides a set of responsive, mobile-first The fluid grid system, with the different screen or viewport size, the system will automatically divide into 12 parts;

The grid system is composed of a series of rows and columns. Create a page layout;

"row" must be contained in a .container or .container-fluid container,

Media queries in grid systems

First contact with Bootstrap framework

Parameters in grid systems

First contact with Bootstrap framework

Case code

<head>
 <meta charset="UTF-8">
 <title>Title</title>
 <!--step1:设置viewport-->
 <meta name="viewport" content="width=device-width,initial-scale=1.0,user-scalable=no">
 <!--step2:引入Bootstrap-->
 <link rel="stylesheet" href="css/bootstrap.css">
 <style>
 .container .row div {
 background-color: grey;
 border:1px solid red;
 }
 </style>
</head>
<body>
<div class="container">
 <div class="row">
 <div class="col-lg-1 col-md-2 col-sm-3 col-xs-6">1</div>
 <div class="col-lg-1 col-md-2 col-sm-3 col-xs-6">2</div>
 <div class="col-lg-1 col-md-2 col-sm-3 col-xs-6">3</div>
 <div class="col-lg-1 col-md-2 col-sm-3 col-xs-6">4</div>
 <div class="col-lg-1 col-md-2 col-sm-3 col-xs-6">5</div>
 <div class="col-lg-1 col-md-2 col-sm-3 col-xs-6">6</div>
 <div class="col-lg-1 col-md-2 col-sm-3 col-xs-6">7</div>
 <div class="col-lg-1 col-md-2 col-sm-3 col-xs-6">8</div>
 <div class="col-lg-1 col-md-2 col-sm-3 col-xs-6">9</div>
 <div class="col-lg-1 col-md-2 col-sm-3 col-xs-6">10</div>
 <div class="col-lg-1 col-md-2 col-sm-3 col-xs-6">11</div>
 <div class="col-lg-1 col-md-2 col-sm-3 col-xs-6">12</div>
 </div>
</div>
</body>

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The page effect will display different effects according to the size of the screen col-lg-, col-md-, col-sm-, col-xs-

First contact with Bootstrap framework

Column offsets (offsets) in the grid system
col-lg-offset-

<head>
 <meta charset="UTF-8">
 <title>Title</title>
 <!--step1:设置viewport-->
 <meta name="viewport" content="width=device-width,initial-scale=1.0,user-scalable=no">
 <!--step2:引入Bootstrap-->
 <link rel="stylesheet" href="css/bootstrap.css">
 
 <style>
 .container .row div {
 background-color: grey;
 border:1px solid red;
 }
 </style>
</head>
<body>
<div class="container">
 <div class="row">
 <div class="col-lg-offset-11 col-lg-1">row - col -1</div>
 </div>
</div>
</body>

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The effect is as follows (offset by 11 columns)

First contact with Bootstrap framework

Columns in the grid system Nesting

<div class="container">
 <div class="row">
 <div class="col-lg-4 col-md-2 col-sm-3 col-xs-6">1</div>
 <div class="col-lg-8 col-md-2 col-sm-3 col-xs-6">2
 <div class="row">
 <div class="col-lg-3 col-md-2 col-sm-3 col-xs-6">3</div>
 <div class="col-lg-3 col-md-2 col-sm-3 col-xs-6">4</div>
 <div class="col-lg-3 col-md-2 col-sm-3 col-xs-6">5</div>
 <div class="col-lg-3 col-md-2 col-sm-3 col-xs-6">6</div>
 </div>
 </div>
 </div>
</div>

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The effect is as follows

First contact with Bootstrap framework

Fluid layout container

Change the outermost layout element .container to .container-fluid, and you can convert the fixed grid layout into a 100% width layout

<div class="contaienr-fluid">
 <div class="row">
  
 </div>
</div>

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First contact with Bootstrap framework