Currently, I have a Vue.js components which contains a list of other components. I know that the common way of working with vue is passing data to children, and emitting events to parents from children.
However, in this case I want to execute a method in the children components when a button in the parent is clicked. Which would be the best way to do it?
One suggested way is to use a global event hub. This allows communication between any components that have access to the hub.
Here is an example showing how an event hub can be used to fire a method on a child component.
var eventHub = new Vue();
Vue.component('child-component', {
template: "<div>The 'clicked' event has been fired {{count}} times</div>",
data: function() {
return {
count: 0
};
},
methods: {
clickHandler: function() {
this.count++;
}
},
created: function() {
// We listen for the event on the eventHub
eventHub.$on('clicked', this.clickHandler);
}
});
new Vue({
el: '#app',
methods: {
clickEvent: function() {
// We emit the event on the event hub
eventHub.$emit('clicked');
}
}
});<script src="https://cdnjs.cloudflare.com/ajax/libs/vue/2.1.3/vue.js"></script>
<div id="app">
<button @click="clickEvent">Click me to emit an event on the hub!</button>
<child-component></child-component>
</div>
eventHub.$off('clicked', this.clickHandler), this can be done on the beforeDestroy lifecycle hookHere is a simple one which worked for me
this.$children[indexOfComponent].childsMethodName();
You can create below helper method in methods in your parent component:
getChild(name) {
for(let child of this.$children) if (child.$options.name==name) return child;
},
And call child component method in this way:
this.getChild('child-component-tag-name').childMethodName(arguments);
I don't test it for Vue>=2.0
