vue.js - How to get data from a nested component -


i have 3 components. 1 question component consists of questions. second questionoption list of choices. , third 1 main component. how data questionoption component main component. since main component not parent of questionoption cannot use $emit. make use of bus it's not working on case. can me on this.

also how chosen answers after submission of button? here code.

main.vue

    <div class="quiz-background">          <question              v-for="(question, $indexparent) in randomquestions"             :question="question['doc'].question"             :choices="question['doc']['choices']"             :indexparent="$indexparent"             :correctanswer="question['doc'].correctanswer"         >                        </question>          <section style="margin:16px">             <v-ons-button                 modifier="cta"                  @click="submit"                  v-show="!isdone"             >submit             </v-ons-button>         </section>      </div>     <script>         submit() {              bus.$on('choosed', function(answer) {                 console.log(answer);              });          },     </script>

question.vue

<template>  <v-ons-list>     <v-ons-list-header>         {{indexparent + 1}}.{{ question }}     </v-ons-list-header>       <question-option          v-for="(choice, key, $index) in choices"          :choice="choice"          :letter="key"          :indexparent="indexparent"          :index="$index"         :correctanswer="correctanswer"     >      </question-option>   </v-ons-list>   </template>  <script> import questionoption './questionoption.vue';  export default {       props: ['question', 'indexparent', 'choices', 'correctanswer'],      components: {         questionoption     } } </script>

questionoption.vue

<template> <v-ons-list modifier="inset">     <v-ons-list-item         :name="'question-' + indexparent"          :modifier="longdivider"         :key="letter"         tappable     >         <label class="left">             <v-ons-radio                     :name="'question-' + indexparent"                 :input-id="indexparent + '-' + index"                 :value="letter"                 :key="letter"                 v-model="chosenanswer"                 @change="appendanswer($event)"             >                </v-ons-radio>         </label>          <label              class="center"              :for="indexparent + '-' + index"                 :class="{'success' : issuccess, 'danger' : isdanger}"                >             {{ letter }} . {{ choice }}         </label>      </v-ons-list-item>   </v-ons-list>  </template>  <script>  import vue 'vue';  var bus = new vue();  export default {       data() {          return {             chosenanswer: ''         }     },      props: ['letter', 'choice','correctanswer', 'indexparent', 'index'],      computed: {         issuccess () {             return this.chosenanswer === this.correctanswer;         },         isdanger () {              return this.chosenanswer !== this.correctanswer;         }     },     methods: {          appendanswer (event) {              var answer = event.target.value;              bus.$emit('choosed', answer);         }     }  } </script>

like the article mentioned in comment, can make js file called event-bus.js, include code below. 

// event-bus.js import vue 'vue'; var eventbus = new vue(); export default eventbus;

after that, import both in questionoption.vue , main.vue this

import bus './event-bus';

then try again. reason why code didn't work because generated 2 vue instances, they've got no relationship each other, no communication happen.


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