• 我耀学IT—day06-导航栏

    一、Bootstrap5 导航栏

    导航栏一般放在页面的顶部。

    我们可以使用 .navbar 类来创建一个标准的导航栏，后面紧跟: .navbar-expand-xxl|xl|lg|md|sm 类来创建响应式的导航栏 (大屏幕水平铺开，小屏幕垂直堆叠)。

    导航栏上的选项可以使用

      元素并添加 class="navbar-nav" 类。 然后在
    • 元素上添加 .nav-item 类， 元素上使用 .nav-link 类:

      例：

      2. <nav class="navbar navbar-expand-sm bg-light">
      4.  <ul class="navbar-nav">
      5.     <li class="nav-item">
      6.       <a class="nav-link" href="#">Link 1a>
      7.     li>
      8.     <li class="nav-item">
      9.       <a class="nav-link" href="#">Link 2a>
      10.     li>
      11.     <li class="nav-item">
      12.       <a class="nav-link" href="#">Link 3a>
      13.     li>
      14.   ul>
      15. nav>

      1.1 垂直导航栏

      通过删除 .navbar-expand-xxl|xl|lg|md|sm 类来创建垂直导航栏:

      例：

      2. <nav class="navbar bg-light">
      4.   <ul class="navbar-nav">
      5.     <li class="nav-item">
      6.       <a class="nav-link" href="#">Link 1a>
      7.     li>
      8.     <li class="nav-item">
      9.       <a class="nav-link" href="#">Link 2a>
      10.     li>
      11.     <li class="nav-item">
      12.       <a class="nav-link" href="#">Link 3a>
      13.     li>
      14.   ul>
      15. nav>

      1.2 居中对齐的导航栏

      通过添加 .justify-content-center 类来创建居中对齐的导航栏:

      例：

      <nav class="navbar navbar-expand-sm bg-light justify-content-center">   ... nav>

      1.3 不同颜色导航栏

      可以使用以下类来创建不同颜色导航栏：.bg-primary, .bg-success, .bg-info, .bg-warning, .bg-danger, .bg-secondary, .bg-dark 和 .bg-light)。

      提示: 对于暗色背景 .navbar-dark 需要设置文本颜色为浅色的，对于浅色背景 .navbar-light 需要设置文本颜色为深色的。

      例：

      2. <nav class="navbar navbar-expand-sm bg-light navbar-light">
      3.   <ul class="navbar-nav">
      4.     <li class="nav-item active">
      5.       <a class="nav-link" href="#">Activea>
      6.     li>
      7.     <li class="nav-item">
      8.       <a class="nav-link" href="#">Linka>
      9.     li>
      10.     <li class="nav-item">
      11.       <a class="nav-link" href="#">Linka>
      12.     li>
      13.     <li class="nav-item">
      14.       <a class="nav-link disabled" href="#">Disableda>
      15.     li>
      16.   ul>
      17. nav>
      19. <nav class="navbar navbar-expand-sm bg-dark navbar-dark">...nav>
      21. <nav class="navbar navbar-expand-sm bg-primary navbar-dark">...nav>

      激活和禁用状态: 可以在 元素上添加 .active 类来高亮显示选中的选项。 .disabled 类用于设置该链接是不可点击的。

      [我耀学IT]  Patience is key in life

      1.4 品牌/Logo

      .navbar-brand 类用于高亮显示品牌/Logo:

      例：

      1. <nav class="navbar navbar-expand-sm bg-dark navbar-dark">   
      2.     <a class="navbar-brand" href="#">Logoa>   ...
      3. nav>

      可以使用 .navbar-brand 类来设置图片自适应导航栏。

      例：

      1. <nav class="navbar navbar-expand-sm bg-dark navbar-dark">    
      2.     <a class="navbar-brand" href="#">     
      3.         <img src="bird.jpg" alt="Logo" style="width:40px;">   
      4.     a>   ... 
      5. nav>

      1.5 折叠导航栏

      通常，小屏幕上我们都会折叠导航栏，通过点击来显示导航选项。

      要创建折叠导航栏，可以在按钮上添加 class="navbar-toggler", data-bs-toggle="collapse" 与 data-target="#thetarget" 类。然后在设置了 class="collapse navbar-collapse" 类的 div 上包裹导航内容（链接）, div 元素上的 id 匹配按钮 data-target 的上指定的 id:

      例：

      1. <nav class="navbar navbar-expand-md bg-dark navbar-dark">
      2.   
      3.   <a class="navbar-brand" href="#">Navbara>
      4.   
      5.   <button class="navbar-toggler" type="button" data-bs-toggle="collapse" data-bs-target="#collapsibleNavbar">
      6.     <span class="navbar-toggler-icon">span>
      7.   button>
      8.   
      9.   <div class="collapse navbar-collapse" id="collapsibleNavbar">
      10.     <ul class="navbar-nav">
      11.       <li class="nav-item">
      12.         <a class="nav-link" href="#">Linka>
      13.       li>
      14.       <li class="nav-item">
      15.         <a class="nav-link" href="#">Linka>
      16.       li>
      17.       <li class="nav-item">
      18.         <a class="nav-link" href="#">Linka>
      19.       li> 
      20.     ul>
      21.   div> 
      22. nav>

      1.6 导航栏使用下拉菜单

      导航栏上可以设置下拉菜单：

      例：

      1. <nav class="navbar navbar-expand-sm bg-dark navbar-dark">
      2.   
      3.   <a class="navbar-brand" href="#">Logoa>
      4.  
      5.   
      6.   <ul class="navbar-nav">
      7.     <li class="nav-item">
      8.       <a class="nav-link" href="#">Link 1a>
      9.     li>
      10.     <li class="nav-item">
      11.       <a class="nav-link" href="#">Link 2a>
      12.     li>
      13.  
      14.     
      15.     <li class="nav-item dropdown">
      16.       <a class="nav-link dropdown-toggle" href="#" id="navbardrop" data-bs-toggle="dropdown">
      17.         Dropdown link
      18.       a>
      19.       <div class="dropdown-menu">
      20.         <a class="dropdown-item" href="#">Link 1a>
      21.         <a class="dropdown-item" href="#">Link 2a>
      22.         <a class="dropdown-item" href="#">Link 3a>
      23.       div>
      24.     li>
      25.   ul>
      26. nav>

      1.7 导航栏的表单与按钮

      导航栏的表单

      元素使用 class="form-inline" 类来排版输入框与按钮：

      例：

      1. <nav class="navbar navbar-expand-sm bg-dark navbar-dark">
      2.   <form class="form-inline">
      3.     <input class="form-control" type="text" placeholder="Search">
      4.     <button class="btn btn-success" type="submit">Searchbutton>
      5.   form>
      6. nav>

      你也可以使用其他的输入框类，如 .input-group-addon 类用于在输入框前添加小标签。

      例：

      1. <nav class="navbar navbar-expand-sm bg-dark navbar-dark">
      2.   <form class="form-inline" action="/action_page.php">
      3.     <div class="input-group">
      4.       <div class="input-group-prepend">
      5.         <span class="input-group-text">@span>
      6.       div>
      7.       <input type="text" class="form-control" placeholder="Username">
      8.     div>
      9.   form>
      10. nav>

      1.8 导航栏文本

      使用 .navbar-text 类来设置导航栏上非链接文本，可以保证水平对齐，颜色与内边距一样。

      例：

      1. <nav class="navbar navbar-expand-sm bg-dark navbar-dark">
      2.  
      4.   <ul class="navbar-nav">
      5.     <li class="nav-item">
      6.       <a class="nav-link" href="#">Link 1a>
      7.     li>
      8.     <li class="nav-item">
      9.       <a class="nav-link" href="#">Link 2a>
      10.     li>
      11.   ul>
      12.  
      13.   
      14.   <span class="navbar-text">
      15.     Navbar text
      16.   span>
      17.  
      18. nav>

      1.9 固定导航栏

      导航栏可以固定在头部或者底部。

      我们使用 .fixed-top 类来实现导航栏的固定：

      例：

      1. <nav class="navbar navbar-expand-sm bg-dark navbar-dark fixed-top">
      2.   ...
      3. nav>

      .fixed-bottom 类用于设置导航栏固定在底部：

      例：

      1. <nav class="navbar navbar-expand-sm bg-dark navbar-dark fixed-bottom">
      2.   ...
      3. nav>

      1.10 导航栏案例

      1. html>
      2. <html>
      3. <head>
      4.   <title>Bootstrap5 实例title>
      5.   <meta charset="utf-8">
      6.   <meta name="viewport" content="width=device-width, initial-scale=1">
      7.   <link href="https://cdn.staticfile.org/twitter-bootstrap/5.1.1/css/bootstrap.min.css" rel="stylesheet">
      8.   <script src="https://cdn.staticfile.org/twitter-bootstrap/5.1.1/js/bootstrap.bundle.min.js">script>
      9.   <style>.bd-placeholder-img{font-size:1.125rem;text-anchor:middle;-webkit-user-select:none;-moz-user-select:none;user-select:none}@media (min-width:768px){.bd-placeholder-img-lg{font-size:3.5rem}}.b-example-divider{height:3rem;background-color:rgba(0,0,0,.1);border:solid rgba(0,0,0,.15);border-width:1px 0;box-shadow:inset 0 .5em 1.5em rgba(0,0,0,.1),inset 0 .125em .5em rgba(0,0,0,.15)}.form-control-dark{color:#fff;background-color:var(--bs-dark);border-color:var(--bs-gray)}.form-control-dark:focus{color:#fff;background-color:var(--bs-dark);border-color:#fff;box-shadow:0 0 0 .25rem rgba(255,255,255,.25)}.bi{vertical-align:-.125em;fill:currentColor}.text-small{font-size:85%}.dropdown-toggle{outline:0}style>
      10. head>
      11. <body>
      12.  
      13. <svg xmlns="http://www.w3.org/2000/svg" style="display: none;">
      14.   <symbol id="bootstrap" viewBox="0 0 118 94">
      15.     <title>Bootstraptitle>
      16.     <path fill-rule="evenodd" clip-rule="evenodd" d="M24.509 0c-6.733 0-11.715 5.893-11.492 12.284.214 6.14-.064 14.092-2.066 20.577C8.943 39.365 5.547 43.485 0 44.014v5.972c5.547.529 8.943 4.649 10.951 11.153 2.002 6.485 2.28 14.437 2.066 20.577C12.794 88.106 17.776 94 24.51 94H93.5c6.733 0 11.714-5.893 11.491-12.284-.214-6.14.064-14.092 2.066-20.577 2.009-6.504 5.396-10.624 10.943-11.153v-5.972c-5.547-.529-8.934-4.649-10.943-11.153-2.002-6.484-2.28-14.437-2.066-20.577C105.214 5.894 100.233 0 93.5 0H24.508zM80 57.863C80 66.663 73.436 72 62.543 72H44a2 2 0 01-2-2V24a2 2 0 012-2h18.437c9.083 0 15.044 4.92 15.044 12.474 0 5.302-4.01 10.049-9.119 10.88v.277C75.317 46.394 80 51.21 80 57.863zM60.521 28.34H49.948v14.934h8.905c6.884 0 10.68-2.772 10.68-7.727 0-4.643-3.264-7.207-9.012-7.207zM49.948 49.2v16.458H60.91c7.167 0 10.964-2.876 10.964-8.281 0-5.406-3.903-8.178-11.425-8.178H49.948z">path>
      17.   symbol>
      18.   <symbol id="home" viewBox="0 0 16 16">
      19.     <path d="M8.354 1.146a.5.5 0 0 0-.708 0l-6 6A.5.5 0 0 0 1.5 7.5v7a.5.5 0 0 0 .5.5h4.5a.5.5 0 0 0 .5-.5v-4h2v4a.5.5 0 0 0 .5.5H14a.5.5 0 0 0 .5-.5v-7a.5.5 0 0 0-.146-.354L13 5.793V2.5a.5.5 0 0 0-.5-.5h-1a.5.5 0 0 0-.5.5v1.293L8.354 1.146zM2.5 14V7.707l5.5-5.5 5.5 5.5V14H10v-4a.5.5 0 0 0-.5-.5h-3a.5.5 0 0 0-.5.5v4H2.5z"/>
      20.   symbol>
      21.   <symbol id="speedometer2" viewBox="0 0 16 16">
      22.     <path d="M8 4a.5.5 0 0 1 .5.5V6a.5.5 0 0 1-1 0V4.5A.5.5 0 0 1 8 4zM3.732 5.732a.5.5 0 0 1 .707 0l.915.914a.5.5 0 1 1-.708.708l-.914-.915a.5.5 0 0 1 0-.707zM2 10a.5.5 0 0 1 .5-.5h1.586a.5.5 0 0 1 0 1H2.5A.5.5 0 0 1 2 10zm9.5 0a.5.5 0 0 1 .5-.5h1.5a.5.5 0 0 1 0 1H12a.5.5 0 0 1-.5-.5zm.754-4.246a.389.389 0 0 0-.527-.02L7.547 9.31a.91.91 0 1 0 1.302 1.258l3.434-4.297a.389.389 0 0 0-.029-.518z"/>
      23.     <path fill-rule="evenodd" d="M0 10a8 8 0 1 1 15.547 2.661c-.442 1.253-1.845 1.602-2.932 1.25C11.309 13.488 9.475 13 8 13c-1.474 0-3.31.488-4.615.911-1.087.352-2.49.003-2.932-1.25A7.988 7.988 0 0 1 0 10zm8-7a7 7 0 0 0-6.603 9.329c.203.575.923.876 1.68.63C4.397 12.533 6.358 12 8 12s3.604.532 4.923.96c.757.245 1.477-.056 1.68-.631A7 7 0 0 0 8 3z"/>
      24.   symbol>
      25.   <symbol id="table" viewBox="0 0 16 16">
      26.     <path d="M0 2a2 2 0 0 1 2-2h12a2 2 0 0 1 2 2v12a2 2 0 0 1-2 2H2a2 2 0 0 1-2-2V2zm15 2h-4v3h4V4zm0 4h-4v3h4V8zm0 4h-4v3h3a1 1 0 0 0 1-1v-2zm-5 3v-3H6v3h4zm-5 0v-3H1v2a1 1 0 0 0 1 1h3zm-4-4h4V8H1v3zm0-4h4V4H1v3zm5-3v3h4V4H6zm4 4H6v3h4V8z"/>
      27.   symbol>
      28.   <symbol id="people-circle" viewBox="0 0 16 16">
      29.     <path d="M11 6a3 3 0 1 1-6 0 3 3 0 0 1 6 0z"/>
      30.     <path fill-rule="evenodd" d="M0 8a8 8 0 1 1 16 0A8 8 0 0 1 0 8zm8-7a7 7 0 0 0-5.468 11.37C3.242 11.226 4.805 10 8 10s4.757 1.225 5.468 2.37A7 7 0 0 0 8 1z"/>
      31.   symbol>
      32.   <symbol id="grid" viewBox="0 0 16 16">
      33.     <path d="M1 2.5A1.5 1.5 0 0 1 2.5 1h3A1.5 1.5 0 0 1 7 2.5v3A1.5 1.5 0 0 1 5.5 7h-3A1.5 1.5 0 0 1 1 5.5v-3zM2.5 2a.5.5 0 0 0-.5.5v3a.5.5 0 0 0 .5.5h3a.5.5 0 0 0 .5-.5v-3a.5.5 0 0 0-.5-.5h-3zm6.5.5A1.5 1.5 0 0 1 10.5 1h3A1.5 1.5 0 0 1 15 2.5v3A1.5 1.5 0 0 1 13.5 7h-3A1.5 1.5 0 0 1 9 5.5v-3zm1.5-.5a.5.5 0 0 0-.5.5v3a.5.5 0 0 0 .5.5h3a.5.5 0 0 0 .5-.5v-3a.5.5 0 0 0-.5-.5h-3zM1 10.5A1.5 1.5 0 0 1 2.5 9h3A1.5 1.5 0 0 1 7 10.5v3A1.5 1.5 0 0 1 5.5 15h-3A1.5 1.5 0 0 1 1 13.5v-3zm1.5-.5a.5.5 0 0 0-.5.5v3a.5.5 0 0 0 .5.5h3a.5.5 0 0 0 .5-.5v-3a.5.5 0 0 0-.5-.5h-3zm6.5.5A1.5 1.5 0 0 1 10.5 9h3a1.5 1.5 0 0 1 1.5 1.5v3a1.5 1.5 0 0 1-1.5 1.5h-3A1.5 1.5 0 0 1 9 13.5v-3zm1.5-.5a.5.5 0 0 0-.5.5v3a.5.5 0 0 0 .5.5h3a.5.5 0 0 0 .5-.5v-3a.5.5 0 0 0-.5-.5h-3z"/>
      34.   symbol>
      35. svg>
      36.  
      37. <main>
      38.   <h1 class="visually-hidden">Headers examplesh1>
      39.  
      40.   <div class="container">
      41.     <header class="d-flex flex-wrap justify-content-center py-3 mb-4 border-bottom">
      42.       <a href="/" class="d-flex align-items-center mb-3 mb-md-0 me-md-auto text-dark text-decoration-none">
      43.         <svg class="bi me-2" width="40" height="32"><use xlink:href="#bootstrap"/>svg>
      44.         <span class="fs-4">Simple headerspan>
      45.       a>
      46.  
      47.       <ul class="nav nav-pills">
      48.         <li class="nav-item"><a href="#" class="nav-link active" aria-current="page">Homea>li>
      49.         <li class="nav-item"><a href="#" class="nav-link">Featuresa>li>
      50.         <li class="nav-item"><a href="#" class="nav-link">Pricinga>li>
      51.         <li class="nav-item"><a href="#" class="nav-link">FAQsa>li>
      52.         <li class="nav-item"><a href="#" class="nav-link">Abouta>li>
      53.       ul>
      54.     header>
      55.   div>
      56.  
      57.   <div class="b-example-divider">div>
      58.  
      59.   <div class="container">
      60.     <header class="d-flex justify-content-center py-3">
      61.       <ul class="nav nav-pills">
      62.         <li class="nav-item"><a href="#" class="nav-link active" aria-current="page">Homea>li>
      63.         <li class="nav-item"><a href="#" class="nav-link">Featuresa>li>
      64.         <li class="nav-item"><a href="#" class="nav-link">Pricinga>li>
      65.         <li class="nav-item"><a href="#" class="nav-link">FAQsa>li>
      66.         <li class="nav-item"><a href="#" class="nav-link">Abouta>li>
      67.       ul>
      68.     header>
      69.   div>
      70.  
      71.   <div class="b-example-divider">div>
      72.  
      73.   <div class="container">
      74.     <header class="d-flex flex-wrap align-items-center justify-content-center justify-content-md-between py-3 mb-4 border-bottom">
      75.       <a href="/" class="d-flex align-items-center col-md-3 mb-2 mb-md-0 text-dark text-decoration-none">
      76.         <svg class="bi me-2" width="40" height="32" role="img" aria-label="Bootstrap"><use xlink:href="#bootstrap"/>svg>
      77.       a>
      78.  
      79.       <ul class="nav col-12 col-md-auto mb-2 justify-content-center mb-md-0">
      80.         <li><a href="#" class="nav-link px-2 link-secondary">Homea>li>
      81.         <li><a href="#" class="nav-link px-2 link-dark">Featuresa>li>
      82.         <li><a href="#" class="nav-link px-2 link-dark">Pricinga>li>
      83.         <li><a href="#" class="nav-link px-2 link-dark">FAQsa>li>
      84.         <li><a href="#" class="nav-link px-2 link-dark">Abouta>li>
      85.       ul>
      86.  
      87.       <div class="col-md-3 text-end">
      88.         <button type="button" class="btn btn-outline-primary me-2">Loginbutton>
      89.         <button type="button" class="btn btn-primary">Sign-upbutton>
      90.       div>
      91.     header>
      92.   div>
      93.  
      94.   <div class="b-example-divider">div>
      95.  
      96.   <header class="p-3 bg-dark text-white">
      97.     <div class="container">
      98.       <div class="d-flex flex-wrap align-items-center justify-content-center justify-content-lg-start">
      99.         <a href="/" class="d-flex align-items-center mb-2 mb-lg-0 text-white text-decoration-none">
      100.           <svg class="bi me-2" width="40" height="32" role="img" aria-label="Bootstrap"><use xlink:href="#bootstrap"/>svg>
      101.         a>
      102.  
      103.         <ul class="nav col-12 col-lg-auto me-lg-auto mb-2 justify-content-center mb-md-0">
      104.           <li><a href="#" class="nav-link px-2 text-secondary">Homea>li>
      105.           <li><a href="#" class="nav-link px-2 text-white">Featuresa>li>
      106.           <li><a href="#" class="nav-link px-2 text-white">Pricinga>li>
      107.           <li><a href="#" class="nav-link px-2 text-white">FAQsa>li>
      108.           <li><a href="#" class="nav-link px-2 text-white">Abouta>li>
      109.         ul>
      110.  
      111.         <form class="col-12 col-lg-auto mb-3 mb-lg-0 me-lg-3">
      112.           <input type="search" class="form-control form-control-dark" placeholder="Search..." aria-label="Search">
      113.         form>
      114.  
      115.         <div class="text-end">
      116.           <button type="button" class="btn btn-outline-light me-2">Loginbutton>
      117.           <button type="button" class="btn btn-warning">Sign-upbutton>
      118.         div>
      119.       div>
      120.     div>
      121.   header>
      122.  
      123.   <div class="b-example-divider">div>
      124.  
      125.   <header class="p-3 mb-3 border-bottom">
      126.     <div class="container">
      127.       <div class="d-flex flex-wrap align-items-center justify-content-center justify-content-lg-start">
      128.         <a href="/" class="d-flex align-items-center mb-2 mb-lg-0 text-dark text-decoration-none">
      129.           <svg class="bi me-2" width="40" height="32" role="img" aria-label="Bootstrap"><use xlink:href="#bootstrap"/>svg>
      130.         a>
      131.  
      132.         <ul class="nav col-12 col-lg-auto me-lg-auto mb-2 justify-content-center mb-md-0">
      133.           <li><a href="#" class="nav-link px-2 link-secondary">Overviewa>li>
      134.           <li><a href="#" class="nav-link px-2 link-dark">Inventorya>li>
      135.           <li><a href="#" class="nav-link px-2 link-dark">Customersa>li>
      136.           <li><a href="#" class="nav-link px-2 link-dark">Productsa>li>
      137.         ul>
      138.  
      139.         <form class="col-12 col-lg-auto mb-3 mb-lg-0 me-lg-3">
      140.           <input type="search" class="form-control" placeholder="Search..." aria-label="Search">
      141.         form>
      142.  
      143.         <div class="dropdown text-end">
      144.           <a href="#" class="d-block link-dark text-decoration-none dropdown-toggle" id="dropdownUser1" data-bs-toggle="dropdown" aria-expanded="false">
      145.             <img src="https://github.com/mdo.png" alt="mdo" width="32" height="32" class="rounded-circle">
      146.           a>
      147.           <ul class="dropdown-menu text-small" aria-labelledby="dropdownUser1">
      148.             <li><a class="dropdown-item" href="#">New project...a>li>
      149.             <li><a class="dropdown-item" href="#">Settingsa>li>
      150.             <li><a class="dropdown-item" href="#">Profilea>li>
      151.             <li><hr class="dropdown-divider">li>
      152.             <li><a class="dropdown-item" href="#">Sign outa>li>
      153.           ul>
      154.         div>
      155.       div>
      156.     div>
      157.   header>
      158.  
      159.   <div class="b-example-divider">div>
      160.  
      161.   <header class="py-3 mb-3 border-bottom">
      162.     <div class="container-fluid d-grid gap-3 align-items-center" style="grid-template-columns: 1fr 2fr;">
      163.       <div class="dropdown">
      164.         <a href="#" class="d-flex align-items-center col-lg-4 mb-2 mb-lg-0 link-dark text-decoration-none dropdown-toggle" id="dropdownNavLink" data-bs-toggle="dropdown" aria-expanded="false">
      165.           <svg class="bi me-2" width="40" height="32"><use xlink:href="#bootstrap"/>svg>
      166.         a>
      167.         <ul class="dropdown-menu text-small shadow" aria-labelledby="dropdownNavLink">
      168.           <li><a class="dropdown-item active" href="#" aria-current="page">Overviewa>li>
      169.           <li><a class="dropdown-item" href="#">Inventorya>li>
      170.           <li><a class="dropdown-item" href="#">Customersa>li>
      171.           <li><a class="dropdown-item" href="#">Productsa>li>
      172.           <li><hr class="dropdown-divider">li>
      173.           <li><a class="dropdown-item" href="#">Reportsa>li>
      174.           <li><a class="dropdown-item" href="#">Analyticsa>li>
      175.         ul>
      176.       div>
      177.  
      178.       <div class="d-flex align-items-center">
      179.         <form class="w-100 me-3">
      180.           <input type="search" class="form-control" placeholder="Search..." aria-label="Search">
      181.         form>
      182.  
      183.         <div class="flex-shrink-0 dropdown">
      184.           <a href="#" class="d-block link-dark text-decoration-none dropdown-toggle" id="dropdownUser2" data-bs-toggle="dropdown" aria-expanded="false">
      185.             <img src="https://github.com/mdo.png" alt="mdo" width="32" height="32" class="rounded-circle">
      186.           a>
      187.           <ul class="dropdown-menu text-small shadow" aria-labelledby="dropdownUser2">
      188.             <li><a class="dropdown-item" href="#">New project...a>li>
      189.             <li><a class="dropdown-item" href="#">Settingsa>li>
      190.             <li><a class="dropdown-item" href="#">Profilea>li>
      191.             <li><hr class="dropdown-divider">li>
      192.             <li><a class="dropdown-item" href="#">Sign outa>li>
      193.           ul>
      194.         div>
      195.       div>
      196.     div>
      197.   header>
      198.  
      199.   <div class="container-fluid pb-3">
      200.     <div class="d-grid gap-3" style="grid-template-columns: 1fr 2fr;">
      201.       <div class="bg-light border rounded-3">
      202.         <br><br><br><br><br><br><br><br><br><br>
      203.       div>
      204.       <div class="bg-light border rounded-3">
      205.         <br><br><br><br><br><br><br><br><br><br>
      206.       div>
      207.     div>
      208.   div>
      209.  
      210.   <div class="b-example-divider">div>
      211.  
      212.   <nav class="py-2 bg-light border-bottom">
      213.     <div class="container d-flex flex-wrap">
      214.       <ul class="nav me-auto">
      215.         <li class="nav-item"><a href="#" class="nav-link link-dark px-2 active" aria-current="page">Homea>li>
      216.         <li class="nav-item"><a href="#" class="nav-link link-dark px-2">Featuresa>li>
      217.         <li class="nav-item"><a href="#" class="nav-link link-dark px-2">Pricinga>li>
      218.         <li class="nav-item"><a href="#" class="nav-link link-dark px-2">FAQsa>li>
      219.         <li class="nav-item"><a href="#" class="nav-link link-dark px-2">Abouta>li>
      220.       ul>
      221.       <ul class="nav">
      222.         <li class="nav-item"><a href="#" class="nav-link link-dark px-2">Logina>li>
      223.         <li class="nav-item"><a href="#" class="nav-link link-dark px-2">Sign upa>li>
      224.       ul>
      225.     div>
      226.   nav>
      227.   <header class="py-3 mb-4 border-bottom">
      228.     <div class="container d-flex flex-wrap justify-content-center">
      229.       <a href="/" class="d-flex align-items-center mb-3 mb-lg-0 me-lg-auto text-dark text-decoration-none">
      230.         <svg class="bi me-2" width="40" height="32"><use xlink:href="#bootstrap"/>svg>
      231.         <span class="fs-4">Double headerspan>
      232.       a>
      233.       <form class="col-12 col-lg-auto mb-3 mb-lg-0">
      234.         <input type="search" class="form-control" placeholder="Search..." aria-label="Search">
      235.       form>
      236.     div>
      237.   header>
      238.  
      239.   <div class="b-example-divider">div>
      240.  
      241.   <header>
      242.     <div class="px-3 py-2 bg-dark text-white">
      243.       <div class="container">
      244.         <div class="d-flex flex-wrap align-items-center justify-content-center justify-content-lg-start">
      245.           <a href="/" class="d-flex align-items-center my-2 my-lg-0 me-lg-auto text-white text-decoration-none">
      246.             <svg class="bi me-2" width="40" height="32" role="img" aria-label="Bootstrap"><use xlink:href="#bootstrap"/>svg>
      247.           a>
      248.  
      249.           <ul class="nav col-12 col-lg-auto my-2 justify-content-center my-md-0 text-small">
      250.             <li>
      251.               <a href="#" class="nav-link text-secondary">
      252.                 <svg class="bi d-block mx-auto mb-1" width="24" height="24"><use xlink:href="#home"/>svg>
      253.                 Home
      254.               a>
      255.             li>
      256.             <li>
      257.               <a href="#" class="nav-link text-white">
      258.                 <svg class="bi d-block mx-auto mb-1" width="24" height="24"><use xlink:href="#speedometer2"/>svg>
      259.                 Dashboard
      260.               a>
      261.             li>
      262.             <li>
      263.               <a href="#" class="nav-link text-white">
      264.                 <svg class="bi d-block mx-auto mb-1" width="24" height="24"><use xlink:href="#table"/>svg>
      265.                 Orders
      266.               a>
      267.             li>
      268.             <li>
      269.               <a href="#" class="nav-link text-white">
      270.                 <svg class="bi d-block mx-auto mb-1" width="24" height="24"><use xlink:href="#grid"/>svg>
      271.                 Products
      272.               a>
      273.             li>
      274.             <li>
      275.               <a href="#" class="nav-link text-white">
      276.                 <svg class="bi d-block mx-auto mb-1" width="24" height="24"><use xlink:href="#people-circle"/>svg>
      277.                 Customers
      278.               a>
      279.             li>
      280.           ul>
      281.         div>
      282.       div>
      283.     div>
      284.     <div class="px-3 py-2 border-bottom mb-3">
      285.       <div class="container d-flex flex-wrap justify-content-center">
      286.         <form class="col-12 col-lg-auto mb-2 mb-lg-0 me-lg-auto">
      287.           <input type="search" class="form-control" placeholder="Search..." aria-label="Search">
      288.         form>
      289.  
      290.         <div class="text-end">
      291.           <button type="button" class="btn btn-light text-dark me-2">Loginbutton>
      292.           <button type="button" class="btn btn-primary">Sign-upbutton>
      293.         div>
      294.       div>
      295.     div>
      296.   header>
      297.  
      298.   <div class="b-example-divider">div>
      299. main>
      300.  
      301. body>
      302. html>

      [我耀学IT]  Patience is key in life

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  • 原文地址：https://blog.csdn.net/2301_78414876/article/details/136608830