emits
validator does not always return a boolean value JS-0660Emitted events can be defined on the component via the emits
option.
In the event a native event (e.g., click
) is defined in the emits
option, it will be overwritten by the event in the component instead of being treated as a native listener.
To add validation, the event is assigned a function that receives the arguments passed to the $emit
call and returns a boolean to indicate whether the event is valid or not.
<script>
export default {
emits: {
qux: function () {},
quux (evt) {
if (!evt) {
return false
}
}
}
}
</script>
<script>
export default {
emits: {
foo (evt) {
if (evt) {
return true
} else {
return false
}
},
bar: function () {
return true
},
baz (evt) {
if (evt) {
return true
}
},
}
}
</script>