1 files changed, 67 insertions, 0 deletions
diff --git a/packages/integrations/react/server-v17.js b/packages/integrations/react/server-v17.js
new file mode 100644
index 000000000..1c0c41286
--- /dev/null
+++ b/packages/integrations/react/server-v17.js
@@ -0,0 +1,67 @@
+import React from 'react';
+import ReactDOM from 'react-dom/server.js';
+import StaticHtml from './static-html.js';
+
+const reactTypeof = Symbol.for('react.element');
+
+function errorIsComingFromPreactComponent(err) {
+	return err.message && (err.message.startsWith("Cannot read property '__H'") || err.message.includes("(reading '__H')"));
+}
+
+function check(Component, props, children) {
+	// Note: there are packages that do some unholy things to create "components".
+	// Checking the $$typeof property catches most of these patterns.
+	if (typeof Component === 'object') {
+		const $$typeof = Component['$$typeof'];
+		return $$typeof && $$typeof.toString().slice('Symbol('.length).startsWith('react');
+	}
+	if (typeof Component !== 'function') return false;
+
+	if (Component.prototype != null && typeof Component.prototype.render === 'function') {
+		return React.Component.isPrototypeOf(Component) || React.PureComponent.isPrototypeOf(Component);
+	}
+
+	let error = null;
+	let isReactComponent = false;
+	function Tester(...args) {
+		try {
+			const vnode = Component(...args);
+			if (vnode && vnode['$$typeof'] === reactTypeof) {
+				isReactComponent = true;
+			}
+		} catch (err) {
+			if (!errorIsComingFromPreactComponent(err)) {
+				error = err;
+			}
+		}
+
+		return React.createElement('div');
+	}
+
+	renderToStaticMarkup(Tester, props, children, {});
+
+	if (error) {
+		throw error;
+	}
+	return isReactComponent;
+}
+
+function renderToStaticMarkup(Component, props, children, metadata) {
+	delete props['class'];
+	const vnode = React.createElement(Component, {
+		...props,
+		children: children != null ? React.createElement(StaticHtml, { value: children }) : undefined,
+	});
+	let html;
+	if (metadata && metadata.hydrate) {
+		html = ReactDOM.renderToString(vnode);
+	} else {
+		html = ReactDOM.renderToStaticMarkup(vnode);
+	}
+	return { html };
+}
+
+export default {
+	check,
+	renderToStaticMarkup,
+};