error boundary

src/components/error-boundary.tsx

@@ -0,0 +1,21 @@
+import React from 'react'
+
+export class ErrorBoundary extends React.Component {
+  state = {
+    error: false
+  }
+
+  static getDerivedStateFromError() {
+    return {
+      error: true
+    }
+  }
+
+  render() {
+    if (this.state.error) {
+      return <h1>Something went wrong.</h1>
+    }
+
+    return this.props.children
+  }
+}