延伸連結
透過 CSS 「延伸」一個巢狀連結,讓任何 HTML 元素或 Bootstrap 元件都能點擊。
將 .stretched-link
新增到連結,讓它的 包含區塊 透過 ::after
偽元素可點擊。在多數情況下,這表示包含具有 .stretched-link
類別的連結,且 position: relative;
的元素可點擊。請注意,由於 CSS position
的運作方式,.stretched-link
無法與大多數表格元素混用。
在 Bootstrap 中,卡片預設為 position: relative
,因此在這種情況下,你可以安全地將 .stretched-link
類別新增到卡片中的連結,而無需任何其他 HTML 變更。
不建議在延伸連結中使用多個連結和點選目標。但是,如果需要,一些 position
和 z-index
樣式可以提供協助。
<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>
大多數自訂元件預設都沒有 position: relative
,因此我們需要在此新增 .position-relative
以防止連結延伸到父元素之外。
<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>
<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>
識別包含區塊
如果延伸連結似乎無法正常運作,則 包含區塊 可能會是原因。下列 CSS 屬性會使元素成為包含區塊
- 除了
static
以外的position
值 - 除了
none
以外的transform
或perspective
值 transform
或perspective
的will-change
值- 除了
none
以外的filter
值或filter
的will-change
值(僅適用於 Firefox)
連結延伸的卡片
一些簡短的範例文字,用於建立在卡片標題上,並構成卡片內容的大部分。
延伸連結在此無法運作,因為 position: relative
已新增至連結
這個 延伸連結 將只會散佈在 p
標籤上,因為已套用轉換。
<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>