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Playwright · Function

expect.extend

expect.extend adds custom assertions to Playwright. A matcher returns whether it passed and provides a failure message.

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Syntax

expect.extend({ matcherName(received, expected, options) { return { pass, message }; } })

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  • expect
  • expect.configure
  • expect.poll
  • expect.toPass
  • testConfig.expect
  • toHaveAttribute

Source: Assertions | Playwright. Checked 2026-11-03.