Exam CRT-450 Topic 1 Question 47 Discussion

To notify the parent component from a child component when a button is clicked:
Option C: Create a custom event
Child Component:
// ChildComponent.js
handleClick() {
const nextEvent = new CustomEvent('next');
this.dispatchEvent(nextEvent);
}
Parent Component:
<!-- ParentComponent.html -->
<c-child-component onnext={handleNext}></c-child-component>
javascript
Copy code
// ParentComponent.js
handleNext() {
// Navigate to the next page
}
Reference:
"To communicate up the component containment hierarchy, fire a custom event in the child component."
- Lightning Web Components Developer Guide: Communicate with Events
Why Other Options Are Incorrect:
Option A: Updating a property on the parent directly is not possible from the child.
Option B: "Fire a notification" is vague and not a standard mechanism.
Option D: Calling a method in the Apex controller does not facilitate child-to-parent communication within components.