1 files changed, 31 insertions, 0 deletions
diff --git a/packages/integrations/preact/src/static-html.ts b/packages/integrations/preact/src/static-html.ts
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index 000000000..453e72b7f
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+++ b/packages/integrations/preact/src/static-html.ts
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+import { h } from 'preact';
+
+type Props = {
+	value: string;
+	name?: string;
+	hydrate?: boolean;
+};
+
+/**
+ * Astro passes `children` as a string of HTML, so we need
+ * a wrapper `div` to render that content as VNodes.
+ *
+ * As a bonus, we can signal to Preact that this subtree is
+ * entirely static and will never change via `shouldComponentUpdate`.
+ */
+const StaticHtml = ({ value, name, hydrate = true }: Props) => {
+	if (!value) return null;
+	const tagName = hydrate ? 'astro-slot' : 'astro-static-slot';
+	return h(tagName, { name, dangerouslySetInnerHTML: { __html: value } });
+};
+
+/**
+ * This tells Preact to opt-out of re-rendering this subtree,
+ * In addition to being a performance optimization,
+ * this also allows other frameworks to attach to `children`.
+ *
+ * See https://preactjs.com/guide/v8/external-dom-mutations
+ */
+StaticHtml.shouldComponentUpdate = () => false;
+
+export default StaticHtml;