astro-ghostcms/www/src/components/SEO.astro

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---
import type { ImageMetadata } from 'astro';
type Image = {
src: string | ImageMetadata;
alt: string;
};
type SEOMetadata = {
name: string;
title: string;
description: string;
image?: Image | undefined;
canonicalURL?: URL | string | undefined;
locale?: string;
};
type OpenGraph = Partial<SEOMetadata> & {
type?: string;
};
type Twitter = Partial<SEOMetadata> & {
handle?: string;
card?: 'summary' | 'summary_large_image';
};
export type Props = SEOMetadata & {
og?: OpenGraph;
twitter?: Twitter;
};
const {
name,
title,
description,
image,
locale = 'en',
canonicalURL = new URL(Astro.url.pathname, Astro.site),
} = Astro.props;
const og = {
name,
title,
description,
canonicalURL,
image,
locale,
type: 'website',
...(Astro.props.og ?? {}),
} satisfies OpenGraph;
const twitter = {
name,
title,
description,
canonicalURL,
image,
locale,
card: 'summary_large_image',
...Astro.props.twitter,
};
function normalizeImageUrl(image: string | ImageMetadata) {
return typeof image === 'string' ? image : image.src;
}
---
<!-- Page Metadata -->
<link rel="canonical" href={canonicalURL} />
<meta name="description" content={description} />
<!-- OpenGraph Tags -->
<meta property="og:title" content={og.title} />
<meta property="og:type" content={og.type} />
<meta property="og:url" content={canonicalURL} />
<meta property="og:locale" content={og.locale} />
<meta property="og:description" content={og.description} />
<meta property="og:site_name" content={og.name} />
{og.image && <meta property="og:image" content={normalizeImageUrl(og.image.src)} />}
{og.image && <meta property="og:image:alt" content={og.image.alt} />}
<!-- Twitter Tags -->
<meta name="twitter:card" content={twitter.card} />
<meta name="twitter:site" content={twitter.handle} />
<meta name="twitter:title" content={twitter.title} />
<meta name="twitter:description" content={twitter.description} />
{twitter.image && <meta name="twitter:image" content={normalizeImageUrl(twitter.image.src)} />}
{twitter.image && <meta name="twitter:image:alt" content={twitter.image.alt} />}