<template>
  <div>
   <app-header></app-header>
  </div>
</template>
<style>
...
</style>
<script>
  import AppHeader from './AppHeader.vue'
  export default {
   name:'app',
   props:['data']
   data() {
    return {}
    },
   methods: {
    handleClick() {}
   },
   components: {
    AppHeader
   }
  }
</script>

 <style scoped> 

 <style lang="sass">

 <template>
  <template v-if="valid">
    <div></div>
  </template>
  <template v-else>
   <div></div>
  </template>
</template> 

 let trim = str => {
 return str.replace(/(^[\s\t]+)|([\s\t]+$)/g, '');
}
export const state = {
  jsons: []
}

export const actions = {
  parse(jsonStr) {
    if(!trim(jsonStr)) return

    let jsonObj = null
    try{  
      jsonObj = JSON.parse(jsonStr)
    }catch(err){
      state.jsons.push({err: jsonStr + '', valid: false })

    }
    if(jsonObj){
      state.jsons.push({obj:jsonObj, valid: true})
    }
  }
}

import { state, actions } from '../store' data() {
  return {
   state,
   actions
  }
 }, 

<child :state="state" :handleClick="actions.update"></child> 

 $width: 80%;
$height: 100%;
$moli-green:#CCF3E4;
$moli-white:#f8f8f8;