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>
into the project
layout container
.container class is used for containers with fixed width and supporting responsive layout
<div class="container"> </div>
.container-fluid class is used for containers with 100% width and occupy the entire viewport
<div class="container-fluid"> </div>
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
Parameters in grid systems
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>
The page effect will display different effects according to the size of the screen col-lg-, col-md-, col-sm-, col-xs-
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>
The effect is as follows (offset by 11 columns)
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>
The effect is as follows
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>
Hot AI Tools
Undresser.AI Undress
AI-powered app for creating realistic nude photos
AI Clothes Remover
Online AI tool for removing clothes from photos.
Undress AI Tool
Undress images for free
Clothoff.io
AI clothes remover
Video Face Swap
Swap faces in any video effortlessly with our completely free AI face swap tool!
Hot Article
Hot Tools
SAP NetWeaver Server Adapter for Eclipse
Integrate Eclipse with SAP NetWeaver application server.
mPDF
mPDF is a PHP library that can generate PDF files from UTF-8 encoded HTML. The original author, Ian Back, wrote mPDF to output PDF files "on the fly" from his website and handle different languages. It is slower than original scripts like HTML2FPDF and produces larger files when using Unicode fonts, but supports CSS styles etc. and has a lot of enhancements. Supports almost all languages, including RTL (Arabic and Hebrew) and CJK (Chinese, Japanese and Korean). Supports nested block-level elements (such as P, DIV),
SublimeText3 Mac version
God-level code editing software (SublimeText3)
Dreamweaver Mac version
Visual web development tools
EditPlus Chinese cracked version
Small size, syntax highlighting, does not support code prompt function
