javascript source code of useChartData

import { computed, ref } from 'vue';

export default function () {
  const seriesData = ref([25, 39, 30, 15]);
  const categories = ref(['Jun', 'Jul', 'Aug', 'Sept']);

  const chartOptions = computed(() => ({
    chart: {
      type: 'line',
    },
    title: {
      text: 'Number of project stars',
    },
    xAxis: {
      categories: categories.value,
    },
    yAxis: {
      title: {
        text: 'Number of stars',
      },
    },
    series: [{
      name: 'New project stars',
      data: seriesData.value,
    }],
  }));

  const onRender = () => {
    console.log('Chart rendered');
  };

  const onUpdate = () => {
    console.log('Chart updated');
  };

  const onDestroy = () => {
    console.log('Chart destroyed');
  };

  return {
    seriesData,
    categories,
    chartOptions,
    onRender,
    onUpdate,
    onDestroy,
  };
}