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Luca Forstner
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ref(nextjs): Improve app router routing instrumentation accuracy (#13695)
Improves the Next.js routing instrumentation by patching the Next.js router and instrumenting window popstates. A few details on this PR that might explain weird-looking logic: - The patching of the router is in a setInterval because Next.js may take a while to write the router to the window object and we don't have a cue when that has happened. - We are using a combination of patching `router.back`/`router.forward` and the `popstate` event to emit a properly named transaction, because `router.back` and `router.forward` aren't passed any useful strings we could use as txn names. - Because there is a slight delay between the `router.back`/`router.forward` calls and the `popstate` event, we temporarily give the navigation span an invalid name that we use as an indicator to drop if one may leak through.
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‎dev-packages/e2e-tests/test-applications/nextjs-app-dir/app/navigation/[param]/browser-back/page.tsx‎

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import Link from 'next/link';
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export const dynamic = 'force-dynamic';
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export default function Page() {
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return <Link href="/navigation">Go back home</Link>;
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}

‎dev-packages/e2e-tests/test-applications/nextjs-app-dir/app/navigation/[param]/link-replace/page.tsx‎

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import Link from 'next/link';
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export const dynamic = 'force-dynamic';
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export default function Page() {
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return <Link href="/navigation">Go back home</Link>;
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}

‎dev-packages/e2e-tests/test-applications/nextjs-app-dir/app/navigation/[param]/link/page.tsx‎

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import Link from 'next/link';
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export const dynamic = 'force-dynamic';
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export default function Page() {
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return <Link href="/navigation">Go back home</Link>;
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}

‎dev-packages/e2e-tests/test-applications/nextjs-app-dir/app/navigation/[param]/router-back/page.tsx‎

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import Link from 'next/link';
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export const dynamic = 'force-dynamic';
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export default function Page() {
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return <Link href="/navigation">Go back home</Link>;
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}

‎dev-packages/e2e-tests/test-applications/nextjs-app-dir/app/navigation/[param]/router-push/page.tsx‎

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export const dynamic = 'force-dynamic';
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export default function Page() {
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return <p>hello world</p>;
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}

‎dev-packages/e2e-tests/test-applications/nextjs-app-dir/app/navigation/[param]/router-replace/page.tsx‎

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export const dynamic = 'force-dynamic';
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export default function Page() {
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return <p>hello world</p>;
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}

‎dev-packages/e2e-tests/test-applications/nextjs-app-dir/app/navigation/page.tsx‎

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'use client';
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import Link from 'next/link';
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import { useRouter } from 'next/navigation';
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export default function Page() {
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const router = useRouter();
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return (
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<ul>
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<li>
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<button
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onClick={() => {
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router.push('/navigation/42/router-push');
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}}
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>
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router.push()
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</button>
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</li>
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<li>
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<button
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onClick={() => {
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router.replace('/navigation/42/router-replace');
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}}
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>
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router.replace()
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</button>
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</li>
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<li>
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<button
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onClick={() => {
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router.forward();
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}}
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>
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router.forward()
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</button>
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</li>
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<li>
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<button
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onClick={() => {
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router.back();
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}}
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>
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router.back()
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</button>
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</li>
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<li>
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<Link href="/navigation/42/link">Normal Link</Link>
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</li>
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<li>
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<Link href="/navigation/42/link-replace" replace>
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Link Replace
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</Link>
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</li>
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</ul>
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);
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}

‎dev-packages/e2e-tests/test-applications/nextjs-app-dir/tests/client-app-routing-instrumentation.test.ts‎

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@@ -53,3 +53,148 @@ test('Creates a navigation transaction for app router routes', async ({ page })
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expect(await clientNavigationTransactionPromise).toBeDefined();
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expect(await serverComponentTransactionPromise).toBeDefined();
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});
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test('Creates a navigation transaction for `router.push()`', async ({ page }) => {
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const navigationTransactionPromise = waitForTransaction('nextjs-app-dir', transactionEvent => {
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return (
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transactionEvent?.transaction === `/navigation/42/router-push` &&
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transactionEvent.contexts?.trace?.op === 'navigation' &&
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transactionEvent.contexts.trace.data?.['navigation.type'] === 'router.push'
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);
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});
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await page.goto('/navigation');
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await page.waitForTimeout(3000);
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await page.getByText('router.push()').click();
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expect(await navigationTransactionPromise).toBeDefined();
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});
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test('Creates a navigation transaction for `router.replace()`', async ({ page }) => {
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const navigationTransactionPromise = waitForTransaction('nextjs-app-dir', transactionEvent => {
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return (
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transactionEvent?.transaction === `/navigation/42/router-replace` &&
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transactionEvent.contexts?.trace?.op === 'navigation' &&
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transactionEvent.contexts.trace.data?.['navigation.type'] === 'router.replace'
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);
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});
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await page.goto('/navigation');
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await page.waitForTimeout(3000);
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await page.getByText('router.replace()').click();
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expect(await navigationTransactionPromise).toBeDefined();
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});
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test('Creates a navigation transaction for `router.back()`', async ({ page }) => {
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const navigationTransactionPromise = waitForTransaction('nextjs-app-dir', transactionEvent => {
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return (
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transactionEvent?.transaction === `/navigation/1337/router-back` &&
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transactionEvent.contexts?.trace?.op === 'navigation'
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);
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});
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await page.goto('/navigation/1337/router-back');
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await page.waitForTimeout(3000);
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await page.getByText('Go back home').click();
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await page.waitForTimeout(3000);
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await page.getByText('router.back()').click();
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expect(await navigationTransactionPromise).toMatchObject({
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contexts: {
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trace: {
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data: {
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'navigation.type': 'router.back',
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},
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},
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},
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});
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});
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test('Creates a navigation transaction for `router.forward()`', async ({ page }) => {
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const navigationTransactionPromise = waitForTransaction('nextjs-app-dir', transactionEvent => {
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return (
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transactionEvent?.transaction === `/navigation/42/router-push` &&
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transactionEvent.contexts?.trace?.op === 'navigation' &&
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transactionEvent.contexts.trace.data?.['navigation.type'] === 'router.forward'
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);
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});
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await page.goto('/navigation');
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await page.waitForTimeout(3000);
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await page.getByText('router.push()').click();
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await page.waitForTimeout(3000);
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await page.goBack();
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await page.waitForTimeout(3000);
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await page.getByText('router.forward()').click();
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expect(await navigationTransactionPromise).toBeDefined();
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});
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test('Creates a navigation transaction for `<Link />`', async ({ page }) => {
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const navigationTransactionPromise = waitForTransaction('nextjs-app-dir', transactionEvent => {
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return (
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transactionEvent?.transaction === `/navigation/42/link` &&
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transactionEvent.contexts?.trace?.op === 'navigation' &&
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transactionEvent.contexts.trace.data?.['navigation.type'] === 'router.push'
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);
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});
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await page.goto('/navigation');
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await page.getByText('Normal Link').click();
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expect(await navigationTransactionPromise).toBeDefined();
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});
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test('Creates a navigation transaction for `<Link replace />`', async ({ page }) => {
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const navigationTransactionPromise = waitForTransaction('nextjs-app-dir', transactionEvent => {
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return (
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transactionEvent?.transaction === `/navigation/42/link-replace` &&
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transactionEvent.contexts?.trace?.op === 'navigation' &&
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transactionEvent.contexts.trace.data?.['navigation.type'] === 'router.replace'
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);
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});
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await page.goto('/navigation');
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await page.waitForTimeout(3000);
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await page.getByText('Link Replace').click();
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expect(await navigationTransactionPromise).toBeDefined();
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});
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test('Creates a navigation transaction for browser-back', async ({ page }) => {
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const navigationTransactionPromise = waitForTransaction('nextjs-app-dir', transactionEvent => {
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return (
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transactionEvent?.transaction === `/navigation/42/browser-back` &&
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transactionEvent.contexts?.trace?.op === 'navigation' &&
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transactionEvent.contexts.trace.data?.['navigation.type'] === 'browser.popstate'
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);
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});
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await page.goto('/navigation/42/browser-back');
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await page.waitForTimeout(3000);
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await page.getByText('Go back home').click();
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await page.waitForTimeout(3000);
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await page.goBack();
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expect(await navigationTransactionPromise).toBeDefined();
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});
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test('Creates a navigation transaction for browser-forward', async ({ page }) => {
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const navigationTransactionPromise = waitForTransaction('nextjs-app-dir', transactionEvent => {
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return (
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transactionEvent?.transaction === `/navigation/42/router-push` &&
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transactionEvent.contexts?.trace?.op === 'navigation' &&
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transactionEvent.contexts.trace.data?.['navigation.type'] === 'browser.popstate'
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);
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});
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await page.goto('/navigation');
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await page.getByText('router.push()').click();
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await page.waitForTimeout(3000);
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await page.goBack();
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await page.waitForTimeout(3000);
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await page.goForward();
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expect(await navigationTransactionPromise).toBeDefined();
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});

‎package.json‎

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"clean:build": "lerna run clean",
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"clean:caches": "yarn rimraf eslintcache .nxcache && yarn jest --clearCache",
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"clean:deps": "lerna clean --yes && rm -rf node_modules && yarn",
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"clean:tarballs": "rimraf **/*.tgz",
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"clean:tarballs": "rimraf -g **/*.tgz",
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"clean:all": "run-s clean:build clean:tarballs clean:caches clean:deps",
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"fix": "run-s fix:biome fix:prettier fix:lerna",
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"fix:lerna": "lerna run fix",

‎packages/nextjs/package.json‎

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"@opentelemetry/instrumentation-http": "0.53.0",
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"@opentelemetry/semantic-conventions": "^1.27.0",
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"@rollup/plugin-commonjs": "26.0.1",
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"@sentry-internal/browser-utils": "8.30.0",
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"@sentry/core": "8.30.0",
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"@sentry/node": "8.30.0",
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"@sentry/opentelemetry": "8.30.0",

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