Bootstrap 5：表单

目录

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堆叠形式

所有具有 .form-control 类的文本 <input> 和 <textarea> 元素都会获得正确的表单样式：

例子

<form action="/action_page.php">
  <div class="mb-3 mt-3">
    <label for="email" class="form-label">Email:</label>
    <input type="email" class="form-control" id="email" placeholder="Enter email" name="email">
  </div>
  <div class="mb-3">
    <label for="pwd" class="form-label">Password:</label>
    <input type="password" class="form-control" id="pwd" placeholder="Enter password" name="pswd">
  </div>
  <div class="form-check mb-3">
    <label class="form-check-label">
      <input class="form-check-input" type="checkbox" name="remember"> Remember me
    </label>
  </div>
  <button type="submit" class="btn btn-primary">Submit</button>
</form>

自己尝试一下→

<!DOCTYPE html>
<html lang="en">
<head>
  <title>Bootstrap Example</title>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <link href="https://cdn.jsdelivr.net/npm/bootstrap@5.3.3/dist/css/bootstrap.min.css" rel="stylesheet">
  <script src="https://cdn.jsdelivr.net/npm/bootstrap@5.3.3/dist/js/bootstrap.bundle.min.js"></script>
</head>
<body>

<div class="container mt-3">
  <h2>Stacked form</h2>
  <form action="/action_page.php">
    <div class="mb-3 mt-3">
      <label for="email">Email:</label>
      <input type="email" class="form-control" id="email" placeholder="Enter email" name="email">
    </div>
    <div class="mb-3">
      <label for="pwd">Password:</label>
      <input type="password" class="form-control" id="pwd" placeholder="Enter password" name="pswd">
    </div>
    <div class="form-check mb-3">
      <label class="form-check-label">
        <input class="form-check-input" type="checkbox" name="remember"> Remember me
      </label>
    </div>
    <button type="submit" class="btn btn-primary">Submit</button>
  </form>
</div>

</body>
</html>

另请注意，我们向每个标签元素添加一个 .form-label 类，以确保正确的填充。

复选框有不同的标记。它们用 .form-check 包裹在容器元素周围，标签具有 .form-check-label 类，而复选框和单选按钮使用 .form-check-input。

文本区

例子

<label for="comment">Comments:</label>
<textarea class="form-control" rows="5" id="comment" name="text"></textarea>

自己尝试一下→

<!DOCTYPE html>
<html lang="en">
<head>
  <title>Bootstrap Example</title>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <link href="https://cdn.jsdelivr.net/npm/bootstrap@5.3.3/dist/css/bootstrap.min.css" rel="stylesheet">
  <script src="https://cdn.jsdelivr.net/npm/bootstrap@5.3.3/dist/js/bootstrap.bundle.min.js"></script>
</head>
<body>

<div class="container mt-3">
  <h2>Textarea</h2>
  <p>Use the .form-control class to style textareas as well:</p>
  <form action="/action_page.php">
    <div class="mb-3 mt-3">
      <label for="comment">Comments:</label>
      &lt;textarea class="form-control" rows="5" id="comment" name="text">&lt;/textarea>
    </div>
    <button type="submit" class="btn btn-primary">Submit</button>
  </form>
</div>

</body>
</html>

表单行/网格（内联表单）

如果您希望表单元素并排显示，请使用 .row 和 .col：

例子

<form>
  <div class="row">
    <div class="col">
      <input type="text" class="form-control" placeholder="Enter email" name="email">
    </div>
    <div class="col">
      <input type="password" class="form-control" placeholder="Enter password" name="pswd">
    </div>
  </div>
</form>

自己尝试一下→

<!DOCTYPE html>
<html lang="en">
<head>
  <title>Bootstrap Example</title>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <link href="https://cdn.jsdelivr.net/npm/bootstrap@5.3.3/dist/css/bootstrap.min.css" rel="stylesheet">
  <script src="https://cdn.jsdelivr.net/npm/bootstrap@5.3.3/dist/js/bootstrap.bundle.min.js"></script>
</head>
<body>

<div class="container mt-3">
  <h2>Inline Forms</h2>
  <p>If you want your form elements to appear side by side, use .row and .col:</p>
  <form>
    <div class="row">
      <div class="col">
        <input type="text" class="form-control" placeholder="Enter email" name="email">
      </div>
      <div class="col">
        <input type="password" class="form-control" placeholder="Enter password" name="pswd">
      </div>
    </div>
  </form>
</div>

</body>
</html>

您将在 Bootstrap 网格一章中了解有关列和行的更多信息。

表单控件大小

您可以使用 .form-control-lg 或 .form-control 输入的大小="w3-codespan">.form-control-sm：

例子

<input type="text" class="form-control form-control-lg" placeholder="Large input">
<input type="text" class="form-control" placeholder="Normal input">
<input type="text" class="form-control form-control-sm" placeholder="Small input">

自己尝试一下 →

<!DOCTYPE html>
<html lang="en">
<head>
  <title>Bootstrap Example</title>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <link href="https://cdn.jsdelivr.net/npm/bootstrap@5.3.3/dist/css/bootstrap.min.css" rel="stylesheet">
  <script src="https://cdn.jsdelivr.net/npm/bootstrap@5.3.3/dist/js/bootstrap.bundle.min.js"></script>
</head>
<body>

<div class="container mt-3">
  <h2>Form Control Size</h2>
  <p>You can change the size of .form-control inputs with .form-control-lg or .form-control-sm:</p>
  <form>
    <input type="text" class="form-control form-control-lg" placeholder="Large input">
    <input type="text" class="form-control mt-3" placeholder="Normal input">
    <input type="text" class="form-control form-control-sm mt-3" placeholder="Small input">
  </form>
</div>

</body>
</html>

禁用和只读

使用禁用和/或只读属性来禁用输入字段：

例子

<input type="text" class="form-control" placeholder="Normal input">
<input type="text" class="form-control" placeholder="Disabled input" disabled>
<input type="text" class="form-control" placeholder="Readonly input" readonly>

自己尝试一下 →

<!DOCTYPE html>
<html lang="en">
<head>
  <title>Bootstrap Example</title>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <link href="https://cdn.jsdelivr.net/npm/bootstrap@5.3.3/dist/css/bootstrap.min.css" rel="stylesheet">
  <script src="https://cdn.jsdelivr.net/npm/bootstrap@5.3.3/dist/js/bootstrap.bundle.min.js"></script>
</head>
<body>

<div class="container mt-3">
  <h2>Disabled and Readonly</h2>
  <p>Use the disabled and/or readonly attributes to disable the input field:</p>
  <form>
    <input type="text" class="form-control" placeholder="Normal input">
    <input type="text" class="form-control mt-3" placeholder="Disabled input" disabled>
    <input type="text" class="form-control mt-3" placeholder="Readonly input" readonly>
  </form>
</div>

</body>
</html>

纯文本输入

使用 .form-control-plaintext 类设置无边框输入字段的样式，但保持适当的边距和填充：

例子

<input type="text" class="form-control-plaintext" placeholder="Plaintext input">
<input type="text" class="form-control" placeholder="Normal input">

自己尝试一下 →

<!DOCTYPE html>
<html lang="en">
<head>
  <title>Bootstrap Example</title>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <link href="https://cdn.jsdelivr.net/npm/bootstrap@5.3.3/dist/css/bootstrap.min.css" rel="stylesheet">
  <script src="https://cdn.jsdelivr.net/npm/bootstrap@5.3.3/dist/js/bootstrap.bundle.min.js"></script>
</head>
<body>

<div class="container mt-3">
  <h2>Plaintext</h2>
  <p>Use the .form-control-plaintext class to style an input field without borders, but with correct marigins and padding:</p>
  <form>
    <input type="text" class="form-control-plaintext" placeholder="Plaintext input">
    <input type="text" class="form-control mt-3" placeholder="Normal input">
  </form>
</div>

</body>
</html>

选色器

要正确设置 type="color" 的输入样式，请使用 .form-control-color 类：

例子

<input type="color" class="form-control form-control-color" value="#CCCCCC">

自己尝试一下→

<!DOCTYPE html>
<html lang="en">
<head>
  <title>Bootstrap Example</title>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <link href="https://cdn.jsdelivr.net/npm/bootstrap@5.3.3/dist/css/bootstrap.min.css" rel="stylesheet">
  <script src="https://cdn.jsdelivr.net/npm/bootstrap@5.3.3/dist/js/bootstrap.bundle.min.js"></script>
</head>
<body>

<div class="container mt-3">
  <h2>Color Picker</h2>
  <p>To style an input with type="color" properly, use the .form-control-color class:</p>
  <form>
    <label for="myColor" class="form-label">Color picker</label>
    <input type="color" class="form-control form-control-color" id="myColor" value="#CCCCCC" title="Choose a color">
  </form>
</div>

</body>
</html>