Bootstrap4 實(shí)用工具

2018-06-02 11:21 更新

在Bootstrap4中包含了很多實(shí)用的小工具，這些功能能夠讓你不用寫 CSS 代碼就能實(shí)現(xiàn)想要的效果，讓開發(fā)更快捷和簡單。

邊框

使用 border 類可以添加或移除邊框:

實(shí)例：

<!DOCTYPE html>
<html>
<head>
  <title>Bootstrap4 實(shí)例</title>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <link rel="stylesheet"  rel="external nofollow" target="_blank"  rel="external nofollow" target="_blank"  rel="external nofollow" target="_blank"  rel="external nofollow" target="_blank"  rel="external nofollow" target="_blank"  rel="external nofollow" target="_blank"  rel="external nofollow" target="_blank"  rel="external nofollow" target="_blank" >
  <script src="https://cdn.bootcss.com/jquery/3.2.1/jquery.min.js" rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow" ></script>
  <script src="https://cdn.bootcss.com/popper.js/1.12.5/umd/popper.min.js" rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow" ></script>
  <script src="https://cdn.bootcss.com/bootstrap/4.1.0/js/bootstrap.min.js" rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow" ></script>
 <style>
  .border {
    display: inline-block;
    width: 70px;
    height: 70px;
    margin: 6px;
  }
  </style>
</head>
<body>
<div class="container">
  <h2>邊框</h2>
  <p>使用 border 類可以添加或移除邊框:</p> 
  <span class="border"></span>
  <span class="border border-0"></span>
  <span class="border border-top-0"></span>
  <span class="border border-right-0"></span>
  <span class="border border-bottom-0"></span>
  <span class="border border-left-0"></span>
</div>
</body>
</html>

邊框顏色

Bootstrap4 提供了一些類來設(shè)置邊框顏色:

實(shí)例：

<!DOCTYPE html>
<html>
<head>
  <title>Bootstrap 實(shí)例</title>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <link rel="stylesheet"  rel="external nofollow" target="_blank"  rel="external nofollow" target="_blank"  rel="external nofollow" target="_blank"  rel="external nofollow" target="_blank"  rel="external nofollow" target="_blank"  rel="external nofollow" target="_blank"  rel="external nofollow" target="_blank"  rel="external nofollow" target="_blank" >
  <script src="https://cdn.bootcss.com/jquery/3.2.1/jquery.min.js" rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow" ></script>
  <script src="https://cdn.bootcss.com/popper.js/1.12.5/umd/popper.min.js" rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow" ></script>
  <script src="https://cdn.bootcss.com/bootstrap/4.1.0/js/bootstrap.min.js" rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow" ></script>
  <style>
  .border {
    display: inline-block;
    width: 70px;
    height: 70px;
    margin: 6px;
  }
  </style>
</head>
<body>
<div class="container">
  <h2>邊框顏色</h2>
  <p>Bootstrap4 提供了一些類來設(shè)置邊框顏色:</p> 
  <span class="border border-primary"></span>
  <span class="border border-secondary"></span>
  <span class="border border-success"></span>
  <span class="border border-danger"></span>
  <span class="border border-warning"></span>
  <span class="border border-info"></span>
  <span class="border border-light"></span>
  <span class="border border-dark"></span>
  <span class="border border-white"></span>
</div>
</body>
</html>

邊框圓角設(shè)置

使用rounded 類可以添加圓角邊框:

實(shí)例：

<!DOCTYPE html>
<html>
<head>
  <title>Bootstrap4 實(shí)例</title>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <link rel="stylesheet"  rel="external nofollow" target="_blank"  rel="external nofollow" target="_blank"  rel="external nofollow" target="_blank"  rel="external nofollow" target="_blank"  rel="external nofollow" target="_blank"  rel="external nofollow" target="_blank"  rel="external nofollow" target="_blank"  rel="external nofollow" target="_blank" >
  <script src="https://cdn.bootcss.com/jquery/3.2.1/jquery.min.js" rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow" ></script>
  <script src="https://cdn.bootcss.com/popper.js/1.12.5/umd/popper.min.js" rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow" ></script>
  <script src="https://cdn.bootcss.com/bootstrap/4.1.0/js/bootstrap.min.js" rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow" ></script>
  <style>
  span {
    display: inline-block;
    width: 70px;
    height: 70px;
    margin: 6px;
    background-color: #555;
  }
  </style>
</head>
<body>
<div class="container">
  <h2>邊框圓角設(shè)置</h2>
  <p>使用rounded 類可以添加圓角邊框:</p> 
  <span class="rounded"></span><!--全部圓角-->
  <span class="rounded-top"></span><!--上方圓角-->
  <span class="rounded-right"></span><!--右邊圓角-->
  <span class="rounded-bottom"></span><!--下方圓角-->
  <span class="rounded-left"></span><!--左邊圓角-->
  <span class="rounded-circle"></span><!--原型圖片-->
  <span class="rounded-0"></span><!--沒有圓角-->
</div>
</body>
</html>

浮動(dòng)

.float-right 類用于設(shè)置元素右浮動(dòng)， .float-left 設(shè)置元素左浮動(dòng), .clearfix 類用于清除浮動(dòng):

實(shí)例：

<!DOCTYPE html>
<html>
<head>
  <title>Bootstrap4 實(shí)例</title>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <link rel="stylesheet"  rel="external nofollow" target="_blank"  rel="external nofollow" target="_blank"  rel="external nofollow" target="_blank"  rel="external nofollow" target="_blank"  rel="external nofollow" target="_blank"  rel="external nofollow" target="_blank"  rel="external nofollow" target="_blank"  rel="external nofollow" target="_blank" >
  <script src="https://cdn.bootcss.com/jquery/3.2.1/jquery.min.js" rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow" ></script>
  <script src="https://cdn.bootcss.com/popper.js/1.12.5/umd/popper.min.js" rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow" ></script>
  <script src="https://cdn.bootcss.com/bootstrap/4.1.0/js/bootstrap.min.js" rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow" ></script>
</head>
<body>
<div class="container">
  <h2>浮動(dòng)</h2>
  <p>.float-right 類用于設(shè)置元素右浮動(dòng)， .float-left 設(shè)置元素左浮動(dòng), .clearfix 類用于清除浮動(dòng):</p> 
  <div class="clearfix">
    <span class="float-left">左浮動(dòng)</span>
    <span class="float-right">右浮動(dòng)</span>
  </div>
</div>
</body>
</html>

響應(yīng)式浮動(dòng)

我們看可以設(shè)置浮動(dòng) (.float-*-left|right - * 為 sm, md, lg 或 xl)的方向依賴于屏幕的大小:

實(shí)例：

<!DOCTYPE html>
<html>
<head>
  <title>Bootstrap4 實(shí)例</title>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <link rel="stylesheet"  rel="external nofollow" target="_blank"  rel="external nofollow" target="_blank"  rel="external nofollow" target="_blank"  rel="external nofollow" target="_blank"  rel="external nofollow" target="_blank"  rel="external nofollow" target="_blank"  rel="external nofollow" target="_blank"  rel="external nofollow" target="_blank" >
  <script src="https://cdn.bootcss.com/jquery/3.2.1/jquery.min.js" rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow" ></script>
  <script src="https://cdn.bootcss.com/popper.js/1.12.5/umd/popper.min.js" rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow" ></script>
  <script src="https://cdn.bootcss.com/bootstrap/4.1.0/js/bootstrap.min.js" rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow" ></script>
</head>
<body>
<div class="container">
  <h2>響應(yīng)式浮動(dòng)</h2>
  <p>重置瀏覽器大小查看效果。</p>
  <p>我們看可以設(shè)置浮動(dòng) (.float-*-left|right - * 為 sm, md, lg 或 xl)的方向依賴于屏幕的大小:</p> 
  <div class="float-sm-right">在大于小屏幕尺寸上右浮動(dòng)</div><br>
  <div class="float-md-right">在大于中等屏幕尺寸上右浮動(dòng)</div><br>
  <div class="float-lg-right">在大于大屏幕尺寸上右浮動(dòng)</div><br>
  <div class="float-xl-right">在大于超大屏幕尺寸上右浮動(dòng)</div><br>
  <div class="float-none">沒有浮動(dòng)</div>
</div>
</body>
</html>

居中對(duì)齊

使用 .mx-auto 類來設(shè)置居中對(duì)齊:

實(shí)例：

<!DOCTYPE html>
<html>
<head>
  <title>Bootstrap4 實(shí)例</title>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <link rel="stylesheet"  rel="external nofollow" target="_blank"  rel="external nofollow" target="_blank"  rel="external nofollow" target="_blank"  rel="external nofollow" target="_blank"  rel="external nofollow" target="_blank"  rel="external nofollow" target="_blank"  rel="external nofollow" target="_blank"  rel="external nofollow" target="_blank" >
  <script src="https://cdn.bootcss.com/jquery/3.2.1/jquery.min.js" rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow" ></script>
  <script src="https://cdn.bootcss.com/popper.js/1.12.5/umd/popper.min.js" rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow" ></script>
  <script src="https://cdn.bootcss.com/bootstrap/4.1.0/js/bootstrap.min.js" rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow" ></script>
</head>
<body>
<div class="container">
  <h1>水平居中</h1>
  <p>使用 .mx-auto 類來設(shè)置居中對(duì)齊::</p>
  <div class="mx-auto bg-warning" style="width:150px">居中</div>
</div>
</body>
</html>

寬度

元素上使用 w-* 類 (.w-25, .w-50, .w-75, .w-100, .mw-100) 來設(shè)置寬度:

實(shí)例：

<!DOCTYPE html>
<html>
<head>
  <title>Bootstrap4 實(shí)例</title>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <link rel="stylesheet"  rel="external nofollow" target="_blank"  rel="external nofollow" target="_blank"  rel="external nofollow" target="_blank"  rel="external nofollow" target="_blank"  rel="external nofollow" target="_blank"  rel="external nofollow" target="_blank"  rel="external nofollow" target="_blank"  rel="external nofollow" target="_blank" >
  <script src="https://cdn.bootcss.com/jquery/3.2.1/jquery.min.js" rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow" ></script>
  <script src="https://cdn.bootcss.com/popper.js/1.12.5/umd/popper.min.js" rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow" ></script>
  <script src="https://cdn.bootcss.com/bootstrap/4.1.0/js/bootstrap.min.js" rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow" ></script>
</head>
<body>
<div class="container">
  <h1>寬度設(shè)置小工具</h1>
  <p>元素上使用 w-* 類 (.w-25, .w-50, .w-75, .w-100, .mw-100) 來設(shè)置寬度:</p>
  <div class="w-25 bg-warning">寬度 25%</div>
  <div class="w-50 bg-warning">寬度 50%</div>
  <div class="w-75 bg-warning">寬度 75%</div>
  <div class="w-100 bg-warning">寬度 100%</div>
  <div class="mw-100 bg-warning">最大寬度 100%</div>
</div>
</body>
</html>

高度

元素上使用 h-* 類 (.h-25, .h-50, .h-75, .h-100, .mh-100) 來設(shè)置高度:

實(shí)例：

<!DOCTYPE html>
<html>
<head>
  <title>Bootstrap4 實(shí)例</title>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <link rel="stylesheet"  rel="external nofollow" target="_blank"  rel="external nofollow" target="_blank"  rel="external nofollow" target="_blank"  rel="external nofollow" target="_blank"  rel="external nofollow" target="_blank"  rel="external nofollow" target="_blank"  rel="external nofollow" target="_blank"  rel="external nofollow" target="_blank" >
  <script src="https://cdn.bootcss.com/jquery/3.2.1/jquery.min.js" rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow" ></script>
  <script src="https://cdn.bootcss.com/popper.js/1.12.5/umd/popper.min.js" rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow" ></script>
  <script src="https://cdn.bootcss.com/bootstrap/4.1.0/js/bootstrap.min.js" rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow" ></script>
</head>
<body>
<div class="container">
  <h1>高度小工具</h1>
  <p>元素上使用 h-* 類 (.h-25, .h-50, .h-75, .h-100, .mh-100) 來設(shè)置高度:</p>
  <div style="height:200px;background-color:#ddd">
    <div class="h-25 d-inline-block p-2 bg-warning">高度 25%</div>
    <div class="h-50 d-inline-block p-2 bg-warning">高度 50%</div>
    <div class="h-75 d-inline-block p-2 bg-warning">高度 75%</div>
    <div class="h-100 d-inline-block p-2 bg-warning">高度 100%</div>
    <div class="mh-100 d-inline-block p-2 bg-warning" style="height:500px">最大高度 100%</div>
  </div>
</div>
</body>
</html>


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