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Consider the code:

medium📝 Predict Output Q13 of 15
Cypress - Element Interactions
Consider the code:
cy.get('#input').trigger('customChange', { detail: { value: 42 } })

What will be the effect of this code in a Cypress test?
AIt causes a syntax error because of the detail object.
BIt changes the value of #input to 42 directly.
CIt triggers a click event instead of 'customChange'.
DIt triggers a 'customChange' event on #input with extra data { value: 42 }.
Step-by-Step Solution
Solution:
  1. Step 1: Understand event triggering with extra options

    The trigger method can send custom events with additional data via the detail property.
  2. Step 2: Analyze the code effect

    The code triggers 'customChange' on '#input' and passes { value: 42 } as event detail. It does not change input value directly or cause syntax errors.
  3. Final Answer:

    It triggers a 'customChange' event on #input with extra data { value: 42 }. -> Option D
  4. Quick Check:

    trigger(event, {detail}) sends custom event data [OK]
Quick Trick: Use detail object to pass extra event data [OK]
Common Mistakes:
  • Assuming trigger changes element properties directly
  • Confusing event name with standard events like click
  • Thinking detail causes syntax errors

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