PDII Exam Dumps | A developer is writing a Jest test for a Lightning web component that conditionally displays child components

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Question 28/90

A developer is writing a Jest test for a Lightning web component that conditionally displays child components based on a user's checkbox selections.
What should the developer do to properly test that the correct components display and hide for each scenario?

A. Create a new describe block for each test.

B. Reset the DOM after each test with the after Each() method.

C. Add a teardown block to reset the DOM after each test.

D. Create a new jsdom instance for each test.

Correct Answer: B

To ensure that the DOM is clean before each test runs, the developer should use the afterEach() method to reset it. This is part of the setup and teardown process in Jest tests, which helps to avoid state leakage between tests. References:
Jest Globals afterEach

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