拉伸链接

通过 CSS“拉伸”嵌套链接，使任何 HTML 元素或 Bootstrap 组件都可点击。

添加.stretched-link到链接以使其包含块(containing block)可通过::after伪元素单击。在大多数情况下，这意味着内部包含.stretched-link类链接子元素且具有position: relative;的元素是可点击的。请注意，鉴于CSS的position工作原理，.stretched-link不能与大多数表格元素混合使用。

默认情况下，卡片在 Bootstrap 中具有position: relative，因此在这种情况下，您可以安全地将.stretched-link类添加到卡片中的链接，而无需任何其他 HTML 更改。

不建议使用拉伸链接使用多个链接和点击目标。但是，如果需要，一些position和z-index样式可以提供帮助。

Card with stretched link

Some quick example text to build on the card title and make up the bulk of the card's content.

Go somewhere

HTML

<div class="card" style="width: 18rem;">
  <img src="..." class="card-img-top" alt="...">
  <div class="card-body">
    <h5 class="card-title">Card with stretched link</h5>
    <p class="card-text">Some quick example text to build on the card title and make up the bulk of the card's content.</p>
    <a href="#" class="btn btn-primary stretched-link">Go somewhere</a>
  </div>
</div>

大多数自定义组件默认是没有position: relative的，所以我们需要在此处添加.position-relative来防止链接延伸到父元素之外。

Custom component with stretched link

This is some placeholder content for the custom component. It is intended to mimic what some real-world content would look like, and we're using it here to give the component a bit of body and size.

Go somewhere

HTML

<div class="d-flex position-relative">
  <img src="..." class="flex-shrink-0 me-3" alt="...">
  <div>
    <h5 class="mt-0">Custom component with stretched link</h5>
    <p>This is some placeholder content for the custom component. It is intended to mimic what some real-world content would look like, and we're using it here to give the component a bit of body and size.</p>
    <a href="#" class="stretched-link">Go somewhere</a>
  </div>
</div>

Columns with stretched link

Another instance of placeholder content for this other custom component. It is intended to mimic what some real-world content would look like, and we're using it here to give the component a bit of body and size.

Go somewhere

HTML

<div class="row g-0 bg-body-secondary position-relative">
  <div class="col-md-6 mb-md-0 p-md-4">
    <img src="..." class="w-100" alt="...">
  </div>
  <div class="col-md-6 p-4 ps-md-0">
    <h5 class="mt-0">Columns with stretched link</h5>
    <p>Another instance of placeholder content for this other custom component. It is intended to mimic what some real-world content would look like, and we're using it here to give the component a bit of body and size.</p>
    <a href="#" class="stretched-link">Go somewhere</a>
  </div>
</div>

识别包含块(containing block)

如果拉伸链接不起作用，则可能是包含块原因。以下 CSS 属性将使元素成为包含块(containing block)：

position的值不是static
transform或perspective的值不是none
will-change的值是transform或perspective
filter的值不是none或will-change的值是filter（仅适用于 Firefox）

Card with stretched links

Some quick example text to build on the card title and make up the bulk of the card's content.

Stretched link will not work here, because position: relative is added to the link

This stretched link will only be spread over the p-tag, because a transform is applied to it.

HTML

<div class="card" style="width: 18rem;">
  <img src="..." class="card-img-top" alt="...">
  <div class="card-body">
    <h5 class="card-title">Card with stretched links</h5>
    <p class="card-text">Some quick example text to build on the card title and make up the bulk of the card's content.</p>
    <p class="card-text">
      <a href="#" class="stretched-link text-danger" style="position: relative;">Stretched link will not work here, because <code>position: relative</code> is added to the link</a>
    </p>
    <p class="card-text bg-light" style="transform: rotate(0);">
      This <a href="#" class="text-warning stretched-link">stretched link</a> will only be spread over the <code>p</code>-tag, because a transform is applied to it.
    </p>
  </div>
</div>