Chartjs-Reactive data with vue-chartjs and Pinia stores

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You don’t set data as response. Please use computed

This code can solve the problem:

<script setup>
import { storeToRefs } from 'pinia'
import { useStore} from '@/store/pinia-store-file';
import {
    Chart as ChartJS,
    CategoryScale,
    LinearScale,
    PointElement,
    LineElement,
    Title,
    Tooltip,
    Legend
} from 'chart.js';
import { Line } from 'vue-chartjs';
import { computed } from "vue"

ChartJS.register(
    CategoryScale,
    LinearScale,
    PointElement,
    LineElement,
    Title,
    Tooltip,
    Legend
);  

const store = useStore();

const storeData= storeToRefs(store);

const data = computed(() => ({
  labels: [...Array(storeData.arr.value.length).keys()],
  datasets: [
    {
      label: 'Data One',
      backgroundColor: '#f87979',
      data: storeData.arr.value
    }
  ]
}))

const options = {
  responsive: true,
  maintainAspectRatio: false
}



</script>

<template>

  <Line :data="data" :options="options" />

</template>

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