'EventTester.vue' child component:
The child component publishes an event handler with the
defineEmits macro. The
defineEmits argument is an array of handler to publish.The defineEmits() macro cannot be used inside a function, it must be placed directly within
<script setup>, as show here.
Read more about Vue.js 3 component events here.
To call the
onTesting method passed in from the parent:
'App.vue' parent component:
The parent component passing a method with the
@onTesting handler. The method passed will be called from the child with the