[Question] access to firebase data through "created()" or "mounted()" about vuefire

[posva]

It should not even exist in the created hook 😁
That's expected since Firebase populates it asynchronously. So there's no guarantee that your array is filled in any hook. You may look at #69 (in the so question) for some advice about getting when the array is ready

[amranidev]

@posva

Basically, it's so important when we need some operation through mounted() while the component is created, these operations may be presented through a child component using it as an initial data.
for example :

<template>
   <div>
      <graph :values="ys" :labels:"xs"></graph>
   <div>
</template>

mounted(){
      this.grahpdata.forEach(data =>{
           this.ys.push(data.y)
           this.xs.push(data.x)
      })
},
firebase(){
   return {
        graphdata: store.state.database.ref('graphdata')
     }
},
data(){
   return {
      xs: [],
      ys: [] 
  }
}