Understanding Bootstrap Modals

Bootstrap modal box: lightweight, customizable pop-up window

Bootstrap modal box is a lightweight, customizable and responsive jQuery Bootstrap plug-in for displaying alert popups, videos, images, and more. It is divided into three parts: the title, the body and the footer, each with its unique function. There is no need to write JavaScript code, because all code and styles are predefined by Bootstrap.

Key Features:

• Lightweight and responsive: The modal box is designed with a simple and well displayed on all devices.
• Highly customizable: You can easily resize, add dynamic content, and even make it scrollable.
• No JavaScript code required: Bootstrap predefined all necessary code and styles.
• Rich event support: You can use jQuery's .on() method to bind various events, such as show.bs.modal, shown.bs.modal, hide.bs.modal, and hidden.bs.modal, to achieve a more granularity control.
• can prevent external clicks from closing: By setting the backdrop option to 'static', you can prevent users from clicking outside the modal box to close it.

Modal box structure:

The default Bootstrap modal box is as follows:

Trigger modal box:

You can use a link or button to trigger a modal box. The marker for the trigger element may look like this:

<a href="https://www.php.cn/link/93ac0c50dd620dc7b88e5fe05c70e15b" class="btn btn-lg btn-success" data-toggle="modal" data-target="https://www.php.cn/link/93ac0c50dd620dc7b88e5fe05c70e15bbasicModal">点击打开模态框</a>

Note that the link element has two custom data properties: data-toggle and data-target. data-toggle Tell Bootstrap what to do, data-target Tell Bootstrap which element to open. Therefore, whenever such a link is clicked, a modal box with ID "basicModal" appears.

Modal box code:

The following are the marks required to define the modal box itself:

<div class="modal fade" id="basicModal" tabindex="-1" role="dialog" aria-labelledby="basicModal" aria-hidden="true">
  <div class="modal-dialog">
    <div class="modal-content">
      <div class="modal-header">
        <h4 id="基本模态框">基本模态框</h4>
        <button type="button" class="close" data-dismiss="modal" aria-label="Close">
          <span aria-hidden="true">×</span>
        </button>
      </div>
      <div class="modal-body">
        <h3 id="模态框主体">模态框主体</h3>
      </div>
      <div class="modal-footer">
        <button type="button" class="btn btn-default" data-dismiss="modal">关闭</button>
        <button type="button" class="btn btn-primary">保存更改</button>
      </div>
    </div>
  </div>
</div>

The parent div of the modal box should be the same as the ID used in the trigger element above. In this case, it is https://www.php.cn/link/93ac0c50dd620dc7b88e5fe05c70e15bbasicModal. The aria-labelledby and aria-hidden properties are used for accessibility and are recommended to be retained.

Adjust the modal box size:

You can change the size of the modal box by adding a modifier class to the .modal-dialog div: modal-lg (large modal box) or modal-sm (small modal box).

Use jQuery to activate the modal box:

You can use jQuery's .modal() function to control the modal box:

<a href="https://www.php.cn/link/93ac0c50dd620dc7b88e5fe05c70e15b" class="btn btn-lg btn-success" data-toggle="modal" data-target="https://www.php.cn/link/93ac0c50dd620dc7b88e5fe05c70e15bbasicModal">点击打开模态框</a>

options is a JavaScript object used to customize behavior, such as:

<div class="modal fade" id="basicModal" tabindex="-1" role="dialog" aria-labelledby="basicModal" aria-hidden="true">
  <div class="modal-dialog">
    <div class="modal-content">
      <div class="modal-header">
        <h4 id="基本模态框">基本模态框</h4>
        <button type="button" class="close" data-dismiss="modal" aria-label="Close">
          <span aria-hidden="true">×</span>
        </button>
      </div>
      <div class="modal-body">
        <h3 id="模态框主体">模态框主体</h3>
      </div>
      <div class="modal-footer">
        <button type="button" class="btn btn-default" data-dismiss="modal">关闭</button>
        <button type="button" class="btn btn-primary">保存更改</button>
      </div>
    </div>
  </div>
</div>

Other available options are: keyboard, show and focus.

Bootstrap modal box event:

You can use jQuery's .on() method to bind various events to further customize the behavior of the Bootstrap modal box.

Summary:

Bootstrap modal box is one of the best plugins provided by Bootstrap. For beginner designers, this is one of the best ways to load content in a popup without writing any JavaScript code.

(The following is the FAQ part, which has been rewritten and streamlined according to the original text)

FAQ:

• What is the purpose of Bootstrap modal box? is used to create pop-up display information without the user leaving the current page. It is often used to display forms, images, or product details.

• How to use JavaScript to trigger Bootstrap modal boxes? Use the .modal('show') method, such as $('https://www.php.cn/link/93ac0c50dd620dc7b88e5fe05c70e15bmyModal').modal('show');.

• How to close the Bootstrap modal box using JavaScript? Use the .modal('hide') method, such as $('https://www.php.cn/link/93ac0c50dd620dc7b88e5fe05c70e15bmyModal').modal('hide');.

• How to customize the appearance of the Bootstrap modal box? You can use class names (such as .modal-lg, .modal-sm, Bootstrap color classes) to customize.

• Can multiple modal boxes be used on the same page? Yes, but only one can be displayed at a time.

• How to add animation to Bootstrap modal box? You can use CSS or JavaScript libraries (such as animate.css).

• How to load dynamic content into the Bootstrap modal box? AJAX is available.

• How to make the Bootstrap modal box scrollable? Use the .modal-dialog-scrollable class.

• How to prevent users from clicking externally to close the Bootstrap modal box? Set the backdrop option to 'static'.

• Does Bootstrap modal boxes support mobile devices? Supported and responsive.

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