first commit

calcom/packages/ui/components/errorBoundary/ErrorBoundary.tsx

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+import type { ErrorInfo } from "react";
+import React from "react";
+
+class ErrorBoundary extends React.Component<
+  { children: React.ReactNode; message?: string },
+  { error: Error | null; errorInfo: ErrorInfo | null }
+> {
+  constructor(props: { children: React.ReactNode } | Readonly<{ children: React.ReactNode }>) {
+    super(props);
+    this.state = { error: null, errorInfo: null };
+  }
+
+  componentDidCatch?(error: Error, errorInfo: ErrorInfo) {
+    // Catch errors in any components below and re-render with error message
+    this.setState({ error, errorInfo });
+    // You can also log error messages to an error reporting service here
+  }
+
+  render() {
+    // do not intercept next-not-found error, allow displaying not-found.tsx page when notFound() is thrown on server side
+    if (
+      this.state.error !== null &&
+      "digest" in this.state.error &&
+      this.state.error.digest === "NEXT_NOT_FOUND"
+    ) {
+      return this.props.children;
+    }
+
+    if (this.state.errorInfo) {
+      // Error path
+      return (
+        <div>
+          <h2>{this.props.message || "Something went wrong."}</h2>
+          <details style={{ whiteSpace: "pre-wrap" }}>
+            {this.state.error && this.state.error.toString()}
+          </details>
+        </div>
+      );
+    }
+    // Normally, just render children
+    return this.props.children;
+  }
+}
+
+export default ErrorBoundary;