[javascript] Call a Vue.js component method from outside the component

Let's say I have a main Vue instance that has child components. Is there a way of calling a method belonging to one of these components from outside the Vue instance entirely?

Here is an example:

var vm = new Vue({_x000D_
  el: '#app',_x000D_
  components: {_x000D_
    'my-component': { _x000D_
      template: '#my-template',_x000D_
      data: function() {_x000D_
        return {_x000D_
          count: 1,_x000D_
      methods: {_x000D_
        increaseCount: function() {_x000D_
  vm['my-component'].increaseCount(); // This doesn't work_x000D_
<script src="http://vuejs.org/js/vue.js"></script>_x000D_
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>_x000D_
<div id="app">_x000D_
  <button id="external-button">External Button</button>_x000D_
<template id="my-template">_x000D_
  <div style="border: 1px solid; padding: 5px;">_x000D_
  <p>A counter: {{ count }}</p>_x000D_
  <button @click="increaseCount">Internal Button</button>_x000D_

So when I click the internal button, the increaseCount() method is bound to its click event so it gets called. There is no way to bind the event to the external button, whose click event I am listening for with jQuery, so I'll need some other way to call increaseCount.


It seems this works:


However, this is not a good solution because I am referencing the component by its index in the children array, and with many components this is unlikely to stay constant and the code is less readable.

This question is related to javascript vue.js

The answer is

In the end I opted for using Vue's ref directive. This allows a component to be referenced from the parent for direct access.


Have a compenent registered on my parent instance:

var vm = new Vue({
    el: '#app',
    components: { 'my-component': myComponent }

Render the component in template/html with a reference:

<my-component ref="foo"></my-component>

Now, elsewhere I can access the component externally

vm.$refs.foo.doSomething(); //assuming my component has a doSomething() method

See this fiddle for an example: https://jsfiddle.net/xmqgnbu3/1/

(old example using Vue 1: https://jsfiddle.net/6v7y6msr/)

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