sample-query.ts

import { collection, getFirestore, query, where } from "firebase/firestore"
import { defineStore } from "pinia"

type ExampleDoc = {
  name: string,
  age: number
}
export type State = {
  queryData: ExampleDoc[] | null,
}
export const useExampleStore = defineStore('expamle', {
  state: (): State => {
    return {
      queryData: null,
    }
  },
  actions: {
    async setup() {
      // Build query
      const store = getFirestore()
      const collectionRef = collection(store, 'Examples')
      const q = query(collectionRef, where('name', '==', 'wombat'))

      // Do the magic
      this.sync('queryData', q)
    }
  }
})