Salesforce Platform Developer I (legacy) — Question 284

Which Lightning Web Component custom event property settings enable the event to bubble up the containment hierarchy and cross the Shadow DOM boundary?

Answer options

• A. bubbles: true, composed: false
• B. bubbles: true, composed: true
• C. bubbles: false, composed: false
• D. bubbles: false, composed: true

Correct answer: B

Explanation

The correct answer is B because setting both bubbles to true and composed to true allows the event to travel up the containment hierarchy and cross the Shadow DOM. Options A, C, and D do not enable both properties, which limits the event's ability to bubble or cross the Shadow DOM as required.