Attempt to transfer the $ref information to the prop data of the component

Hey, I have a Carousel component and a method like this:

carousel () {
  return this.$refs.carousel
}

But when I try to pass it as a prop to another component, the data in the prop is coming back as undefined. Why is that happening?

<Dots :carousel="carousel()" />

Within the child component, here's what I have:

export default {
  name: 'Dots',
  props: ['carousel']
}

When I try calling console.log(this.carousel) in the mounted hook, it returns undefined. However, I actually need to access the data of the Carousel component. How can I achieve this?

Here's a link to the sandbox for reference: https://codesandbox.io/s/flamboyant-monad-5bhjz?file=/src/components/Test.vue

javascriptvue.js

Answer №1

To send data from carousel to dots, you can define a function in the carousel component that returns the desired data. Then, in the parent component, assign this returned value to an attribute in the data section, which will be passed as a prop:

const dotsComponent = Vue.component('dotsComponent', { 
  template: '#dotsComponent',
  props: ['carousel']
});

const carouselComponent = Vue.component('carouselComponent', { 
  template: '#carouselComponent',
  data() { return { id:1 } },
  methods: { 
    getData() { return { id: this.id } } 
  }
});

new Vue({
  el: "#app",
  components: { dotsComponent, carouselComponent },
  data() { return { carousel:null } },
  mounted() { this.carousel = this.$refs.carousel.getData(); }
});
<script src="https://cdnjs.cloudflare.com/ajax/libs/vue/2.5.17/vue.js"></script>

<div id="app">
  <div><carousel-component ref="carousel"/></div>
  <div><dots-component :carousel="carousel"/></div>
</div>

<template id="dotsComponent"><p>Dots: {{carousel}}</p></template>

<template id="carouselComponent"><p>Carousel</p></template>

Answer №2

One option is to simply pass the reference directly without involving any other method or property:

<Dots :carousel="$refs.carousel" />

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