Bootstrap 简明教程

Bootstrap - Close Button

本章将讨论 Bootstrap 关闭按钮。关闭按钮用于关闭内容，例如模态窗口、警报和弹出层。

This chapter will discuss about Bootstrap close button. Close button is used for dismissing content like modals, alerts, and popovers.

Basic example

  1. Use .btn-close for creating a close button. Default styling is customizable.

  2. Change Sass variables to change background-image and add text for screen readers using aria-label.

Example

您可以使用*编辑和运行*选项编辑并尝试运行此代码。

You can edit and try running this code using *Edit & Run *option.

    <!DOCTYPE html>
    <html lang="en">
    <head>
      <title>Bootstrap - Close Button</title>
      <meta charset="UTF-8">
      <meta http-equiv="X-UA-Compatible" content="IE=edge">
      <meta name="viewport" content="width=device-width, initial-scale=1.0">
      <link href="https://cdn.jsdelivr.net/npm/bootstrap@5.3.0-alpha3/dist/css/bootstrap.min.css" rel="stylesheet">
      <script src="https://cdn.jsdelivr.net/npm/bootstrap@5.3.0-alpha3/dist/js/bootstrap.bundle.min.js"></script>
    </head>
    <body>
      <div class="container mt-2">
        Close Notification
        <button type="button" class="btn-close" aria-label="Close"></button>
      </div>
    </body>
    </html>

Disabled state

  1. Disable close buttons with disabled attribute. Bootstrap also applies pointer-events: none; and user-select: none; to prevent triggering of hover and active states.

  2. The opacity of disabled close buttons is changed.

Example

您可以使用*编辑和运行*选项编辑并尝试运行此代码。

You can edit and try running this code using *Edit & Run *option.

    <!DOCTYPE html>
    <html lang="en">
    <head>
      <title>Bootstrap - Close Button</title>
      <meta charset="UTF-8">
      <meta http-equiv="X-UA-Compatible" content="IE=edge">
      <meta name="viewport" content="width=device-width, initial-scale=1.0">
      <link href="https://cdn.jsdelivr.net/npm/bootstrap@5.3.0-alpha3/dist/css/bootstrap.min.css" rel="stylesheet">
      <script src="https://cdn.jsdelivr.net/npm/bootstrap@5.3.0-alpha3/dist/js/bootstrap.bundle.min.js"></script>
    </head>
    <body>
      <div class="container mt-2">
        Close Notification
        <button type="button" class="btn-close" disabled aria-label="Close"></button>
      </div>
    </body>
    </html>

Dark variant

在 data-bs-theme="dark" 中加入 .btn-close 类或其父元素以反转关闭按钮。 filter 属性用于反转 background-image 。

To invert the close button, add data-bs-theme="dark" to .btn-close class or to it’s parent elements. The filter property is used to invert the background-image.

Example

您可以使用*编辑和运行*选项编辑并尝试运行此代码。

You can edit and try running this code using *Edit & Run *option.

    <!DOCTYPE html>
    <html lang="en">
    <head>
      <title>Bootstrap - Close Button</title>
      <meta charset="UTF-8">
      <meta http-equiv="X-UA-Compatible" content="IE=edge">
      <meta name="viewport" content="width=device-width, initial-scale=1.0">
      <link href="https://cdn.jsdelivr.net/npm/bootstrap@5.3.0-alpha3/dist/css/bootstrap.min.css" rel="stylesheet">
      <script src="https://cdn.jsdelivr.net/npm/bootstrap@5.3.0-alpha3/dist/js/bootstrap.bundle.min.js"></script>
    </head>
    <body>
        Close Notification
        <button type="button" class="btn-close" data-bs-theme="dark" aria-label="Close"></button>
        <button type="button" class="btn-close" data-bs-theme="dark" disabled aria-label="Close"></button>
    </body>
    </html>