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小工具区域

小工具区域是模板中命名的区域,管理员可以在其中放置内容块。可将它们用于侧边栏、页脚栏、推广横幅或任何编辑人员应能控制而无需接触代码的部分。

使用 getWidgetArea() 通过名称获取小工具区域:

src/layouts/Base.astro
---
import { getWidgetArea } from "emdash";
const sidebar = await getWidgetArea("sidebar");
---
{sidebar && sidebar.widgets.length > 0 && (
<aside class="sidebar">
{sidebar.widgets.map(widget => (
<div class="widget">
{widget.title && <h3>{widget.title}</h3>}
<!-- Render widget content -->
</div>
))}
</aside>
)}

如果小工具区域不存在,该函数返回 null。

一个小工具区域包含元数据和一个小工具数组:

interface WidgetArea {
id: string;
name: string; // Unique identifier ("sidebar", "footer-1")
label: string; // Display name ("Main Sidebar")
description?: string;
widgets: Widget[];
}
interface Widget {
id: string;
type: "content" | "menu" | "component";
title?: string;
// Type-specific fields
content?: PortableTextBlock[]; // For content widgets
menuName?: string; // For menu widgets
componentId?: string; // For component widgets
componentProps?: Record<string, unknown>;
}

EmDash 支持三种小工具类型:

以 Portable Text 格式存储的富文本内容。使用 PortableText 组件进行渲染:

---
import { PortableText } from "emdash/ui";
---
{widget.type === "content" && widget.content && (
<div class="widget-content">
<PortableText value={widget.content} />
</div>
)}

在小工具区域内显示导航菜单:

---
import { getMenu } from "emdash";
const menu = widget.menuName ? await getMenu(widget.menuName) : null;
---
{widget.type === "menu" && menu && (
<nav class="widget-nav">
<ul>
{menu.items.map(item => (
<li><a href={item.url}>{item.label}</a></li>
))}
</ul>
</nav>
)}

渲染一个具有可配置属性的已注册组件。EmDash 包含以下核心组件:

组件 ID描述属性
core:recent-posts近期文章列表count, showThumbnails, showDate
core:categories分类列表showCount, hierarchical
core:tags标签云showCount, limit
core:search搜索表单placeholder
core:archives月度/年度归档type, limit

创建一个可复用的小工具渲染器组件:

src/components/WidgetRenderer.astro
---
import { PortableText } from "emdash/ui";
import { getMenu } from "emdash";
import type { Widget } from "emdash";
// Import your widget components
import RecentPosts from "./widgets/RecentPosts.astro";
import Categories from "./widgets/Categories.astro";
import TagCloud from "./widgets/TagCloud.astro";
import SearchForm from "./widgets/SearchForm.astro";
import Archives from "./widgets/Archives.astro";
interface Props {
widget: Widget;
}
const { widget } = Astro.props;
const componentMap: Record<string, any> = {
"core:recent-posts": RecentPosts,
"core:categories": Categories,
"core:tags": TagCloud,
"core:search": SearchForm,
"core:archives": Archives,
};
const menu = widget.type === "menu" && widget.menuName
? await getMenu(widget.menuName)
: null;
---
<div class="widget">
{widget.title && <h3 class="widget-title">{widget.title}</h3>}
{widget.type === "content" && widget.content && (
<div class="widget-content">
<PortableText value={widget.content} />
</div>
)}
{widget.type === "menu" && menu && (
<nav class="widget-menu">
<ul>
{menu.items.map(item => (
<li><a href={item.url}>{item.label}</a></li>
))}
</ul>
</nav>
)}
{widget.type === "component" && widget.componentId && componentMap[widget.componentId] && (
<Fragment>
{(() => {
const Component = componentMap[widget.componentId!];
return <Component {...widget.componentProps} />;
})()}
</Fragment>
)}
</div>
src/components/widgets/RecentPosts.astro
---
import { getEmDashCollection } from "emdash";
interface Props {
count?: number;
showThumbnails?: boolean;
showDate?: boolean;
}
const { count = 5, showThumbnails = false, showDate = true } = Astro.props;
const { entries: posts } = await getEmDashCollection("posts", {
limit: count,
orderBy: { publishedAt: "desc" },
});
---
<ul class="recent-posts">
{posts.map(post => (
<li>
{showThumbnails && post.data.featured_image && (
<img src={post.data.featured_image} alt="" class="thumbnail" />
)}
<a href={`/posts/${post.slug}`}>{post.data.title}</a>
{showDate && post.data.publishedAt && (
<time datetime={post.data.publishedAt.toISOString()}>
{post.data.publishedAt.toLocaleDateString()}
</time>
)}
</li>
))}
</ul>
src/components/widgets/SearchForm.astro
---
interface Props {
placeholder?: string;
}
const { placeholder = "Search..." } = Astro.props;
---
<form action="/search" method="get" class="search-form">
<input
type="search"
name="q"
placeholder={placeholder}
aria-label="Search"
/>
<button type="submit">Search</button>
</form>

以下示例展示了一个带有侧边栏小工具区域的博客布局:

src/layouts/BlogPost.astro
---
import { getWidgetArea } from "emdash";
import WidgetRenderer from "../components/WidgetRenderer.astro";
const sidebar = await getWidgetArea("sidebar");
---
<div class="layout">
<main class="content">
<slot />
</main>
{sidebar && sidebar.widgets.length > 0 && (
<aside class="sidebar">
{sidebar.widgets.map(widget => (
<WidgetRenderer widget={widget} />
))}
</aside>
)}
</div>
<style>
.layout {
display: grid;
grid-template-columns: 1fr 300px;
gap: 2rem;
}
@media (max-width: 768px) {
.layout {
grid-template-columns: 1fr;
}
}
</style>

使用 getWidgetAreas() 检索所有小工具区域及其包含的小工具:

import { getWidgetAreas } from "emdash";
const areas = await getWidgetAreas();
// Returns all areas with widgets populated

通过管理界面 /_emdash/admin/widgets 创建小工具区域,或使用管理 API:

POST /_emdash/api/widget-areas
Content-Type: application/json
{
"name": "footer-1",
"label": "Footer Column 1",
"description": "First column in the footer"
}

添加一个内容小工具:

POST /_emdash/api/widget-areas/footer-1/widgets
Content-Type: application/json
{
"type": "content",
"title": "About Us",
"content": [
{
"_type": "block",
"style": "normal",
"children": [{ "_type": "span", "text": "Welcome to our site." }]
}
]
}

添加一个组件小工具:

POST /_emdash/api/widget-areas/sidebar/widgets
Content-Type: application/json
{
"type": "component",
"title": "Recent Posts",
"componentId": "core:recent-posts",
"componentProps": { "count": 5, "showDate": true }
}

通过名称获取一个小工具区域及其所有小工具。

参数:

  • name — 小工具区域的唯一标识符(字符串)

返回: Promise<WidgetArea | null>

列出所有小工具区域及其包含的小工具。

返回: Promise<WidgetArea[]>

列出管理界面中可用的小工具组件定义。

返回: WidgetComponentDef[]