add error page

commafeed-client/src/components/ErrorBoundary.tsx

@@ -0,0 +1,26 @@
+import { ErrorPage } from "pages/ErrorPage"
+import React, { ReactNode } from "react"
+
+interface ErrorBoundaryProps {
+    children?: ReactNode
+}
+
+interface ErrorBoundaryState {
+    error?: Error
+}
+
+export class ErrorBoundary extends React.Component<ErrorBoundaryProps, ErrorBoundaryState> {
+    constructor(props: ErrorBoundaryProps) {
+        super(props)
+        this.state = {}
+    }
+
+    componentDidCatch(error: Error) {
+        this.setState({ error })
+    }
+
+    render() {
+        if (this.state.error) return <ErrorPage error={this.state.error} />
+        return this.props.children
+    }
+}