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Popups and New Tabs

Popups and New Tabs: definition, detailed explanation, practical usage, examples, mistakes, interview notes, and practice for Playwright automation.

Definition and Brief Explanation

Definition: Popups and New Tabs is part of controlling or verifying movement between pages, URLs, tabs, or browser events.

Explanation: Popups and New Tabs matters because navigation is asynchronous. A strong Playwright test starts the needed wait before the action, then confirms both the URL or event and the visible page result.

Why It Matters

  • It makes the Playwright suite easier to understand and debug.
  • It supports reliable automation instead of one-off scripts.
  • It helps explain the topic in interviews with practical examples.
  • It connects code behavior with user-facing results.

How It Works

  1. Identify the role this topic plays in the test flow.
  2. Use the Playwright API that directly matches the need.
  3. Keep the example small enough to debug.
  4. Add an assertion or verification that proves success.

Syntax and Examples

Example 1: Capture popup

const popupPromise = page.waitForEvent('popup');
await page.getByRole('link', { name: 'Open invoice' }).click();
const popup = await popupPromise;
await expect(popup).toHaveURL(/invoice/);

Explanation: Start waiting for the popup before clicking the link that opens it.

Common Mistakes

  • Using the API without understanding the test goal.
  • Mixing too many unrelated checks in one example.
  • Skipping verification after setup or action.
  • Ignoring Playwright reports, traces, or failure messages.

Interview Notes

  1. What is Popups and New Tabs?
  2. Where does Popups and New Tabs fit in Playwright?
  3. Can you show a realistic example?
  4. What mistake would make this flaky?

Practice Task

Create a small Playwright example for Popups and New Tabs. Add one positive assertion, one note about what can go wrong, and one improvement that would make the test more maintainable.

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