跳到正文

可复用的组件 ​

机器翻译

本页由英文原文机器翻译而来,尚未经过母语审校,欢迎在 GitHub 上提出修改。内容如有出入,以英文原文为准。

任务: 把一张卡片写一次,在任何页面上以不同的内容使用。

yaml
# Recipe: a reusable component with props and a slot, kept out of the URLs.
paths:
  components: ./components

组件也是一个 .q 文件。它的 q:param 就是它的 props,q:slot 是调用者的内容 放进去的地方。把它放在名字以 _ 开头的文件夹里:它可以被导入,但永远不会响应 URL。

xml
<q:component name="Card">
  <!-- Props are q:params; the caller's content goes where q:slot is. -->
  <q:param name="title" type="string" required="true" />
  <q:param name="tone" type="string" default="plain" />

  <section class="card card-{tone}">
    <h2>{title}</h2>
    <div class="card-body">
      <q:slot />
    </div>
  </section>
</q:component>

q:import 把它引入页面,<Card> 使用它。每个属性都是一个 prop,标签之间的内容 填入 slot,用页面的变量计算:

xml
<q:component name="Dashboard">
  <!-- from="_shared": a folder whose name starts with _ is never a page. -->
  <q:import component="Card" from="_shared" />
  <q:set name="open" type="number" value="4" />

  <html>
  <body>
    <Card title="Open tickets">
      <p>{open} waiting for an answer.</p>
    </Card>
    <Card title="Warning" tone="alert">
      <p>The mail server is slow today.</p>
    </Card>
  </body>
  </html>
</q:component>
xml
<q:test name="each card has its title and the page's content" page="/">
  <test:visit />
  <test:expect text="Open tickets 4 waiting for an answer." />
  <test:expect text="Warning The mail server is slow today." />
</q:test>

<q:test name="a component in a _ folder is not a page" page="/_shared/Card">
  <test:visit />
  <test:expect status="404" />
</q:test>
text
tests/cards.test.q
  PASS  each card has its title and the page's content
  PASS  a component in a _ folder is not a page
2 passed, 0 failed

参见 COMP-1、COMP-3 和 ROUTE-3。

MIT 许可证 · 使用 VitePress 构建