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ストレッチリンク Stretched link

CSSを介してネストされたリンクを「伸ばす」ことで、任意のHTML要素またはBootstrapコンポーネントをクリック可能にします。

リンクに.stretched-linkを追加して、::after疑似要素を介してその包含ブロックをクリック可能にします。ほとんどの場合、これは.stretched-linkクラスを持つリンクを含むposition: relative;を持つ要素がクリック可能になることを意味します。CSSのpositionの仕組みを考えると、.stretched-linkはほとんどのtable要素と混在できないことに注意してください。

Bootstrapではカードはデフォルトでposition: relativeを持っているため、この場合、他のHTML変更なしでカード内のリンクに.stretched-linkクラスを安全に追加できます。

stretched linkでは、複数のリンクとタップターゲットは推奨されません。ただし、必要に応じて、一部のpositionz-indexスタイルが役立つ場合があります。

Card image cap
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>

ほとんどのカスタムコンポーネントはデフォルトでposition: relativeを持っていないため、リンクが親要素の外に伸びるのを防ぐために、ここに.position-relativeを追加する必要があります。

Generic placeholder image22222
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>
Generic placeholder image
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>

包含ブロックの識別

stretched linkが機能しないように見える場合、包含ブロックが原因である可能性があります。次のCSSプロパティは、要素を包含ブロックにします:

  • static以外のposition
  • none以外のtransformまたはperspective
  • transformまたはperspectivewill-change
  • none以外のfilter値、またはfilterwill-change値(Firefoxでのみ動作)
Card image cap
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>