Press n or j to go to the next uncovered block, b, p or k for the previous block.
| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 | 7x 7x 7x | <script>
const broadcast = function (condition, eventName, ...args) {
this.$children.forEach(($child) => {
if (condition($child))
$child.$emit(eventName, ...args);
else
broadcast.apply($child, [condition, eventName].concat(args));
});
};
export default {
name: 'm-emitter',
methods: {
$dispatch(condition, eventName, ...args) {
if (typeof condition === 'string') {
const name = condition;
condition = ($parent) => $parent.$options.name === name;
}
let $parent = this.$parent || this.$root;
while ($parent && !condition($parent))
$parent = $parent.$parent;
$parent && $parent.$emit(eventName, ...args);
},
$broadcast(condition, eventName, ...args) {
if (typeof condition === 'string') {
const name = condition;
condition = ($child) => $child.$options.name === name;
}
broadcast.apply(this, [condition, eventName].concat(args));
},
$contact(condition, callback) {
if (typeof condition === 'string') {
const name = condition;
condition = ($parent) => $parent.$options.name === name;
}
let $parent = this.$parent || this.$root;
while ($parent && !condition($parent))
$parent = $parent.$parent;
return $parent && callback($parent);
},
$emitPrevent(name, $event, senderVM, ...args) {
let cancel = false;
this.$emit(
name,
Object.assign($event || {}, {
preventDefault: () => (cancel = true),
}),
senderVM,
...args,
);
return cancel;
},
},
};
</script>
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