导航中图标，表单的编程：
<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"> <title>Bootstrap 101 Template</title> <link href="http://cdn.bootcss.com/bootstrap/3.3.1/css/bootstrap-theme.min.css" rel="external nofollow" rel="external nofollow" rel="stylesheet"> <link href="http://cdn.bootcss.com/bootstrap/3.3.1/css/bootstrap.min.css" rel="external nofollow" rel="external nofollow" rel="stylesheet"> </head> <body> <nav class="navbar navbar-default" role="navigation"> <!-- <nav class="navbar navbar-default navbar-inverse" role="navigation"> --> <div class="container-fluid"> <!-- 导航图标 --> <div class="navbar-header"> <a class="navbar-brand" href="#" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" > <img alt="Brand" src="/UploadFiles/2021-04-02/1.jpg">结果：
路径导航：
<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"> <title>Bootstrap 101 Template</title> <link href="http://cdn.bootcss.com/bootstrap/3.3.1/css/bootstrap-theme.min.css" rel="external nofollow" rel="external nofollow" rel="stylesheet"> <link href="http://cdn.bootcss.com/bootstrap/3.3.1/css/bootstrap.min.css" rel="external nofollow" rel="external nofollow" rel="stylesheet"> </head> <body> <!-- 路径导航 --> <ol class="breadcrumb"> <li><a href="#" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >home</a></li> <li><a href="#" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >libray</a></li> <li class="active">data</li> </ol> <script src="/UploadFiles/2021-04-02/jquery.min.js">结果：
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