Bootstrap5 画布(Offcanvas)

半兽人 发表于: 2021-04-23   最后更新时间: 2021-07-14 00:08:57  
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例子

画布组件(Offcanvas components)

下面是一个默认显示的offcanvas例子(通过.offcanvas上的.show)。Offcanvas 包括带有关闭按钮的标题的支持,以及对一些初始padding的可选body的支持。我们建议你尽可能在 offcanvas 的标题中加入关闭动作,或者提供一个明确的关闭按钮。

<div class="offcanvas offcanvas-start show" tabindex="-1" id="offcanvas" aria-labelledby="offcanvasLabel" data-bs-backdrop="false" data-bs-scroll="true">
  <div class="offcanvas-header">
    <h5 class="offcanvas-title" id="offcanvasLabel">Offcanvas</h5>
    <button type="button" class="btn-close text-reset" data-bs-dismiss="offcanvas" aria-label="Close"></button>
  </div>
  <div class="offcanvas-body">
    Content for the offcanvas goes here. You can place just about any Bootstrap component or custom elements here.
  </div>
</div>

在线运行

现场演示(Live Demo)

使用下面的按钮,通过JavaScript来显示和隐藏一个offcanvas元素,在一个具有.offcanvas类的元素上切换.show类。

  • .offcanvas 隐藏内容 (默认)
  • .offcanvas.show 显示内容

您可以使用带有 href 属性的链接,或带有 data-bs-target 属性的按钮。 在这两种情况下,都需要data-bs-toggle="offcanvas"

<a class="btn btn-primary" data-bs-toggle="offcanvas" href="#offcanvasExample" role="button" aria-controls="offcanvasExample">
  Link with href
</a>
<button class="btn btn-primary" type="button" data-bs-toggle="offcanvas" data-bs-target="#offcanvasExample" aria-controls="offcanvasExample">
  Button with data-bs-target
</button>

<div class="offcanvas offcanvas-start" tabindex="-1" id="offcanvasExample" aria-labelledby="offcanvasExampleLabel">
  <div class="offcanvas-header">
    <h5 class="offcanvas-title" id="offcanvasExampleLabel">Offcanvas</h5>
    <button type="button" class="btn-close text-reset" data-bs-dismiss="offcanvas" aria-label="Close"></button>
  </div>
  <div class="offcanvas-body">
    <div>
      Some text as placeholder. In real life you can have the elements you have chosen. Like, text, images, lists, etc.
    </div>
    <div class="dropdown mt-3">
      <button class="btn btn-secondary dropdown-toggle" type="button" id="dropdownMenuButton" data-bs-toggle="dropdown">
        Dropdown button
      </button>
      <ul class="dropdown-menu" aria-labelledby="dropdownMenuButton">
        <li><a class="dropdown-item" href="#">Action</a></li>
        <li><a class="dropdown-item" href="#">Another action</a></li>
        <li><a class="dropdown-item" href="#">Something else here</a></li>
      </ul>
    </div>
  </div>
</div>

在线运行

放置(Placement)

offcanvas没有默认的位置,所以你必须添加下面的一个修改器类。

  • .offcanvas-start 将 offcanvas 放在窗口的左侧(如上所示)
  • .offcanvas-end 将 offcanvas 放在窗口的右侧
  • .offcanvas-top 将 offcanvas 放在窗口的顶部
  • .offcanvas-bottom 将 offcanvas 放在窗口的底部

尝试下面的顶部、右侧和底部示例。

<button class="btn btn-primary" type="button" data-bs-toggle="offcanvas" data-bs-target="#offcanvasTop" aria-controls="offcanvasTop">Toggle top offcanvas</button>

<div class="offcanvas offcanvas-top" tabindex="-1" id="offcanvasTop" aria-labelledby="offcanvasTopLabel">
  <div class="offcanvas-header">
    <h5 id="offcanvasTopLabel">Offcanvas top</h5>
    <button type="button" class="btn-close text-reset" data-bs-dismiss="offcanvas" aria-label="Close"></button>
  </div>
  <div class="offcanvas-body">
    ...
  </div>
</div>

在线运行

<button class="btn btn-primary" type="button" data-bs-toggle="offcanvas" data-bs-target="#offcanvasRight" aria-controls="offcanvasRight">Toggle right offcanvas</button>

<div class="offcanvas offcanvas-end" tabindex="-1" id="offcanvasRight" aria-labelledby="offcanvasRightLabel">
  <div class="offcanvas-header">
    <h5 id="offcanvasRightLabel">Offcanvas right</h5>
    <button type="button" class="btn-close text-reset" data-bs-dismiss="offcanvas" aria-label="Close"></button>
  </div>
  <div class="offcanvas-body">
    ...
  </div>
</div>

在线运行

<button class="btn btn-primary" type="button" data-bs-toggle="offcanvas" data-bs-target="#offcanvasBottom" aria-controls="offcanvasBottom">Toggle bottom offcanvas</button>

<div class="offcanvas offcanvas-bottom" tabindex="-1" id="offcanvasBottom" aria-labelledby="offcanvasBottomLabel">
  <div class="offcanvas-header">
    <h5 class="offcanvas-title" id="offcanvasBottomLabel">Offcanvas bottom</h5>
    <button type="button" class="btn-close text-reset" data-bs-dismiss="offcanvas" aria-label="Close"></button>
  </div>
  <div class="offcanvas-body small">
    ...
  </div>
</div>

在线运行

背景

当offcanvas及其背景可见时,滚动 <body> 元素将被禁用。使用data-bs-scroll属性切换<body> 滚动和data-bs-backdrop切换背景。

<button class="btn btn-primary" type="button" data-bs-toggle="offcanvas" data-bs-target="#offcanvasScrolling" aria-controls="offcanvasScrolling">Enable body scrolling</button>
<button class="btn btn-primary" type="button" data-bs-toggle="offcanvas" data-bs-target="#offcanvasWithBackdrop" aria-controls="offcanvasWithBackdrop">Enable backdrop (default)</button>
<button class="btn btn-primary" type="button" data-bs-toggle="offcanvas" data-bs-target="#offcanvasWithBothOptions" aria-controls="offcanvasWithBothOptions">Enable both scrolling & backdrop</button>

<div class="offcanvas offcanvas-start" data-bs-scroll="true" data-bs-backdrop="false" tabindex="-1" id="offcanvasScrolling" aria-labelledby="offcanvasScrollingLabel">
  <div class="offcanvas-header">
    <h5 class="offcanvas-title" id="offcanvasScrollingLabel">Colored with scrolling</h5>
    <button type="button" class="btn-close text-reset" data-bs-dismiss="offcanvas" aria-label="Close"></button>
  </div>
  <div class="offcanvas-body">
    <p>Try scrolling the rest of the page to see this option in action.</p>
  </div>
</div>
<div class="offcanvas offcanvas-start" tabindex="-1" id="offcanvasWithBackdrop" aria-labelledby="offcanvasWithBackdropLabel">
  <div class="offcanvas-header">
    <h5 class="offcanvas-title" id="offcanvasWithBackdropLabel">Offcanvas with backdrop</h5>
    <button type="button" class="btn-close text-reset" data-bs-dismiss="offcanvas" aria-label="Close"></button>
  </div>
  <div class="offcanvas-body">
    <p>.....</p>
  </div>
</div>
<div class="offcanvas offcanvas-start" data-bs-scroll="true" tabindex="-1" id="offcanvasWithBothOptions" aria-labelledby="offcanvasWithBothOptionsLabel">
  <div class="offcanvas-header">
    <h5 class="offcanvas-title" id="offcanvasWithBothOptionsLabel">Backdroped with scrolling</h5>
    <button type="button" class="btn-close text-reset" data-bs-dismiss="offcanvas" aria-label="Close"></button>
  </div>
  <div class="offcanvas-body">
    <p>Try scrolling the rest of the page to see this option in action.</p>
  </div>
</div>

在线运行



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