


Learn to use bootstrap (navigation bar, drop-down menu, carousel, grid layout, etc.)
This article is a year-end summary of learning and using bootstrap for your reference. The specific content is as follows
bootstrap framework
BootStrap learning starts from now on. The front-end development framework Bootstrap can greatly simplify the website development process and is thus loved by the majority of developers. .
<!DOCTYPE html> <html lang="zh-cn"><!-- 语言设置 --> <head> <meta charset="utf-8"> <meta http-equiv="X-UA-Compatible" content="IE=edge"> <meta name="viewport" content="width=device-width, initial-scale=1"><!-- 浏览器缩放 --> <title>Bootstrap</title> <!-- Bootstrap --> <link href="css/bootstrap.min.css" rel="stylesheet"> <!-- HTML5 shim and Respond.js for IE8 support of HTML5 elements and media queries --> <!-- WARNING: Respond.js doesn't work if you view the page via file:// --> <!--[if lt IE 9]> <script src="http://cdn.bootcss.com/html5shiv/3.7.2/html5shiv.min.js"></script> <script src="http://cdn.bootcss.com/respond.js/1.4.2/respond.min.js"></script> </head> <body> <h1>你好</h1> <!-- jQuery (necessary for Bootstrap's JavaScript plugins) --> <script src="http://cdn.bootcss.com/jquery/1.11.1/jquery.min.js"></script> <!-- Include all compiled plugins (below), or include individual files as needed --> <script src="js/bootstrap.min.js"></script> </body> </html>
Navigation
Navigation is no stranger to a front-end person. It can be said that navigation is one of the important elements and components of a website, which can facilitate users to find various functional services provided by the website.
<nav class="nabber navbar-default" role="navigation"><!--导航条、默认样式、role定义内容是一个导航条--> <div class="container-fluid"><!--container居中固定宽度、c-f自适应大小的导航条--> <div class="navbar-header"> <!--在响应式浏览器宽度小于一定值时,显示按钮--> <button type="button" class="navbar-toggle collapsed" data-toggle="collapse" data-target="#bs-example-navbar-collapse-1"> <span class="sr-only">Toggle navigation</span> <span class="icon-bar"></span> <span class="icon-bar"></span> <span class="icon-bar"></span> </button> <!--logo图标--> <a class="navbar-brand" href="#">Brand</a> </div> <div class="collapse navbar-collapse" id="bs-example-navbar-collapse-1"><!--包裹代码,在宽度大于一定值时,button和此代码是没有作用的--> <!--导航条导航项目--> <ul class="nav navbar-nav"> <li class="active"><a href="#">a</a></li> <li><a href="#">a</a></li> </ul> </div> </div> </nav> .navbar-inverse:改变导航条的背景颜色 .container:居中显示 固定导航条会遮盖页面内容,解决办法设置body的*padding-top*
Drop-down menu
Friends, please note that the drop-down menu component in the Bootstrap framework is an independent component.
<li class="dropdown"> <a href="#" class="dropdown-toggle" data-toggle="dropdown">下拉菜单<span class="caret"></span></a> <ul class="dropdown-menu" role="menu"> <li><a href="#">Action</a></li> <li><a href="#">Another action</a></li> <li><a href="#">Something else</a></li> <li class="divider"></li> <li><a href="#">linkkk/a></li> </ul> </li>
The data attribute API can use all Bootstrap plug-ins
Carousel ads (carousel)
<div id="carousel-example-generic" class="carousel slide" data-ride="carousel"> <!--底部导航点。。。--> <ol class="carousel-indicators"> <li data-target="#carousel-example-generic" data-slide-to="0"></li> <li data-target="#carousel-example-generic" data-slide-to="1" class="active"></li> <li data-target="#carousel-example-generic" data-slide-to="2"></li> </ol> <!--轮播广告内容--> <div class="carousel-inner" role="listbox"> <div class="item active"> <img src="…"> <div class="carousel-caption">……</div> </div> <div class="item active"> <img src="…"> <div class="carousel-caption">……</div> </div> </div> <!--左右箭头--> <a class="left carousel-control" href="#carousel-example-generic" role="button" data-slide="prev"> <span class="glyphicon glyphicon-chevron-left"></span> <pan class="sr-only">previous</span> </a> <a class="right carousel-control" href="#carousel-example-generic" role="button" data-slide="next"> <span class="glyphicon glyphicon-chevron-right"></span> <pan class="sr-only">Next</span> </a> </div>
.data-slide-to index, pointing to the content of the carousel ads, starting from 0
.carousel sets the style of the advertising box (Height, background color)
.carousel .item Set the style of the advertising box (height, background color)
Grid system layout
<div class="container"> <div class="row"> <div class="col-md-4">.col-md-4</div> <div class="col-md-4">.col-md-4</div> <div class="col-md-4">.col-md-4</div> </div> </div>
Tab page tabs
<!--标签--> <ul class="nav nav-tabs" role="tablist"> <li class="active"><a href="#home" role="tab" data-toggle="tab">Home</a></li> <li><a href="#profile" role="tab" data-toggle="tab">Profile</a></li> <li><a href="#messages" role="tab" data-toggle="tab">Messages</a></li> <li><a href="#settings" role="tab" data-toggle="tab">Settings</a></li> </ul> <!--标签的内容--> <div class="tab-content"> <div class="tab-pane active" id="home">…</div> <div class="tab-pane" id="profile">…</div> <div class="tab-pane" id="messages">…</div> <div class="tab-pane" id="settings">…</div> </div>
Tab page tabs
<div class="modal fade"> <div class="modal-dialog"> <div class="content"> <!--标签头部--> <div class="modal-header"> <button type="button" class="close" data-dismiss="modal"> <span aria-hidden="true">×</span> <span class="sr-only">Close</span> <h4 class="modal-title">Modal title</h4> </button> </div> <!--标签体--> <div class="modal-body"> … </div> <!--标签底部--> <div class="modal-footer"> <button type="button" class="btn btn-default" data-dismiss="modal">Close</button> <button type="button" class="btn btn-default" data-dismiss="modal">Save</button> </div> </div> </div> </div>

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How to use Bootstrap to get the value of the search bar: Determines the ID or name of the search bar. Use JavaScript to get DOM elements. Gets the value of the element. Perform the required actions.

Use Bootstrap to implement vertical centering: flexbox method: Use the d-flex, justify-content-center, and align-items-center classes to place elements in the flexbox container. align-items-center class method: For browsers that do not support flexbox, use the align-items-center class, provided that the parent element has a defined height.

There are two ways to create a Bootstrap split line: using the tag, which creates a horizontal split line. Use the CSS border property to create custom style split lines.

There are several ways to insert images in Bootstrap: insert images directly, using the HTML img tag. With the Bootstrap image component, you can provide responsive images and more styles. Set the image size, use the img-fluid class to make the image adaptable. Set the border, using the img-bordered class. Set the rounded corners and use the img-rounded class. Set the shadow, use the shadow class. Resize and position the image, using CSS style. Using the background image, use the background-image CSS property.

To adjust the size of elements in Bootstrap, you can use the dimension class, which includes: adjusting width: .col-, .w-, .mw-adjust height: .h-, .min-h-, .max-h-

To set up the Bootstrap framework, you need to follow these steps: 1. Reference the Bootstrap file via CDN; 2. Download and host the file on your own server; 3. Include the Bootstrap file in HTML; 4. Compile Sass/Less as needed; 5. Import a custom file (optional). Once setup is complete, you can use Bootstrap's grid systems, components, and styles to create responsive websites and applications.

How to use the Bootstrap button? Introduce Bootstrap CSS to create button elements and add Bootstrap button class to add button text

Answer: You can use the date picker component of Bootstrap to view dates in the page. Steps: Introduce the Bootstrap framework. Create a date selector input box in HTML. Bootstrap will automatically add styles to the selector. Use JavaScript to get the selected date.
