vercel · timneutkens · Oct 11, 2022 · Oct 10, 2022 · Oct 10, 2022 · Oct 10, 2022
@@ -28,6 +28,7 @@ import {
   // LayoutSegmentsContext,
 } from './hooks-client-context'
 import { useReducerWithReduxDevtools } from './use-reducer-with-devtools'
+import { ErrorBoundary, GlobalErrorComponent } from './error-boundary'
 
 function urlToUrlWithoutFlightMarker(url: string): URL {
   const urlWithoutFlightParameters = new URL(url, location.origin)
@@ -91,20 +92,22 @@ let initialParallelRoutes: CacheNode['parallelRoutes'] =
 
 const prefetched = new Set<string>()
 
+type AppRouterProps = {
+  initialTree: FlightRouterState
+  initialCanonicalUrl: string
+  children: ReactNode
+  assetPrefix: string
+}
+
 /**
  * The global router that wraps the application components.
  */
-export default function AppRouter({
+function Router({
   initialTree,
   initialCanonicalUrl,
   children,
   assetPrefix,
-}: {
-  initialTree: FlightRouterState
-  initialCanonicalUrl: string
-  children: ReactNode
-  assetPrefix: string
-}) {
+}: AppRouterProps) {
   const initialState = useMemo(() => {
     return {
       tree: initialTree,
@@ -367,3 +370,11 @@ export default function AppRouter({
     </PathnameContext.Provider>
   )
 }
+
+export default function AppRouter(props: AppRouterProps) {
+  return (
+    <ErrorBoundary errorComponent={GlobalErrorComponent}>
+      <Router {...props} />
+    </ErrorBoundary>
+  )
+}
@@ -0,0 +1,108 @@
+import React from 'react'
+
+export type ErrorComponent = React.ComponentType<{
+  error: Error
+  reset: () => void
+}>
+interface ErrorBoundaryProps {
+  errorComponent: ErrorComponent
+}
+
+/**
+ * Handles errors through `getDerivedStateFromError`.
+ * Renders the provided error component and provides a way to `reset` the error boundary state.
+ */
+class ErrorBoundaryHandler extends React.Component<
+  ErrorBoundaryProps,
+  { error: Error | null }
+> {
+  constructor(props: ErrorBoundaryProps) {
+    super(props)
+    this.state = { error: null }
+  }
+
+  static getDerivedStateFromError(error: Error) {
+    return { error }
+  }
+
+  reset = () => {
+    this.setState({ error: null })
+  }
+
+  render() {
+    if (this.state.error) {
+      return (
+        <this.props.errorComponent
+          error={this.state.error}
+          reset={this.reset}
+        />
+      )
+    }
+
+    return this.props.children
+  }
+}
+
+/**
+ * Renders error boundary with the provided "errorComponent" property as the fallback.
+ * If no "errorComponent" property is provided it renders the children without an error boundary.
+ */
+export function ErrorBoundary({
+  errorComponent,
+  children,
+}: ErrorBoundaryProps & { children: React.ReactNode }): JSX.Element {
+  if (errorComponent) {
+    return (
+      <ErrorBoundaryHandler errorComponent={errorComponent}>
+        {children}
+      </ErrorBoundaryHandler>
+    )
+  }
+
+  return <>{children}</>
+}
+
+const styles: { [k: string]: React.CSSProperties } = {
+  error: {
+    fontFamily:
+      '-apple-system, BlinkMacSystemFont, Roboto, "Segoe UI", "Fira Sans", Avenir, "Helvetica Neue", "Lucida Grande", sans-serif',
+    height: '100vh',
+    textAlign: 'center',
+    display: 'flex',
+    flexDirection: 'column',
+    alignItems: 'center',
+    justifyContent: 'center',
+  },
+
+  desc: {
+    display: 'inline-block',
+    textAlign: 'left',
+    lineHeight: '49px',
+    height: '49px',
+    verticalAlign: 'middle',
+  },
+  h2: {
+    fontSize: '14px',
+    fontWeight: 'normal',
+    lineHeight: '49px',
+    margin: 0,
+    padding: 0,
+  },
+}
+
+export function GlobalErrorComponent() {
+  return (
+    <html>
+      <body>
+        <div style={styles.error}>
+          <div style={styles.desc}>
+            <h2 style={styles.h2}>
+              Application error: a client-side exception has occurred (see the
+              browser console for more information).
+            </h2>
+          </div>
+        </div>
+      </body>
+    </html>
+  )
+}
@@ -20,6 +20,7 @@ import type {
   FlightSegmentPath,
   // FlightDataPath,
 } from '../../server/app-render'
+import type { ErrorComponent } from './error-boundary'
 import {
   LayoutRouterContext,
   GlobalLayoutRouterContext,
@@ -28,7 +29,7 @@ import {
 } from '../../shared/lib/app-router-context'
 import { fetchServerResponse } from './app-router.client'
 import { createInfinitePromise } from './infinite-promise'
-
+import { ErrorBoundary } from './error-boundary'
 import { matchSegment } from './match-segments'
 
 /**
@@ -364,65 +365,6 @@ function NotFoundBoundary({ notFound, children }: NotFoundBoundaryProps) {
   )
 }
 
-type ErrorComponent = React.ComponentType<{ error: Error; reset: () => void }>
-interface ErrorBoundaryProps {
-  errorComponent: ErrorComponent
-}
-
-/**
- * Handles errors through `getDerivedStateFromError`.
- * Renders the provided error component and provides a way to `reset` the error boundary state.
- */
-class ErrorBoundaryHandler extends React.Component<
-  ErrorBoundaryProps,
-  { error: Error | null }
-> {
-  constructor(props: ErrorBoundaryProps) {
-    super(props)
-    this.state = { error: null }
-  }
-
-  static getDerivedStateFromError(error: Error) {
-    return { error }
-  }
-
-  reset = () => {
-    this.setState({ error: null })
-  }
-
-  render() {
-    if (this.state.error) {
-      return (
-        <this.props.errorComponent
-          error={this.state.error}
-          reset={this.reset}
-        />
-      )
-    }
-
-    return this.props.children
-  }
-}
-
-/**
- * Renders error boundary with the provided "errorComponent" property as the fallback.
- * If no "errorComponent" property is provided it renders the children without an error boundary.
- */
-function ErrorBoundary({
-  errorComponent,
-  children,
-}: ErrorBoundaryProps & { children: React.ReactNode }): JSX.Element {
-  if (errorComponent) {
-    return (
-      <ErrorBoundaryHandler errorComponent={errorComponent}>
-        {children}
-      </ErrorBoundaryHandler>
-    )
-  }
-
-  return <>{children}</>
-}
-
 /**
  * OuterLayoutRouter handles the current segment as well as <Offscreen> rendering of other segments.
  * It can be rendered next to each other with a different `parallelRouterKey`, allowing for Parallel routes.

@@ -0,0 +1,20 @@
+'client'
+
+import { useState } from 'react'
+
+export default function Page() {
+  const [clicked, setClicked] = useState(false)
+  if (clicked) {
+    throw new Error('this is a test')
+  }
+  return (
+    <button
+      id="error-trigger-button"
+      onClick={() => {
+        setClicked(true)
+      }}
+    >
+      Trigger Error!
+    </button>
+  )
+}