拉伸链接

通过 CSS 使 “stretching” 可点击的任何 HTML 元素或 Bootstrap 组件成为嵌套链接。

将 .stretched-link 添加到链接，使其包含块可通过 ::after 伪元素点击。在大多数情况下，这意味着具有 position: relative; 且包含 .stretched-link 类链接的元素是可单击的。请注意，鉴于 CSS position 的工作原理、.stretched-link 不能与大多数表格元素混合。

¥Add .stretched-link to a link to make its containing block clickable via a ::after pseudo element. In most cases, this means that an element with position: relative; that contains a link with the .stretched-link class is clickable. Please note given how CSS position works, .stretched-link cannot be mixed with most table elements.

Bootstrap 中卡片默认具有 position: relative，因此在这种情况下，你可以安全地将 .stretched-link 类添加到卡片中的链接，而无需进行任何其他 HTML 更改。

¥Cards have position: relative by default in Bootstrap, so in this case you can safely add the .stretched-link class to a link in the card without any other HTML changes.

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，某些 position 和 z-index 样式可以提供帮助。

¥Multiple links and tap targets are not recommended with stretched links. However, some position and z-index styles can help should this be required.

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没有 position: relative，因此我们需要在此处添加 .position-relative 以防止链接扩展到父元素之外。

¥Most custom components do not have position: relative by default, so we need to add the .position-relative here to prevent the link from stretching outside the parent element.

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

¥Identifying the containing block

如果拉伸的链接似乎不起作用，则可能是包含块造成的。以下 CSS 属性将使元素成为包含块：

¥If the stretched link doesn’t seem to work, the containing block will probably be the cause. The following CSS properties will make an element the containing block:

除 static 之外的 position 值

¥A position value other than static
除 none 之外的 transform 或 perspective 值

¥A transform or perspective value other than none
will-change 值为 transform 或 perspective

¥A will-change value of transform or perspective
除 none 之外的 filter 值或 filter 的 will-change 值（仅适用于 Firefox）

¥A filter value other than none or a will-change value of filter (only works on 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-body-tertiary" 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>