Dual Axis Currency Labels in Vue

<template>
  <div>
    <div id="chart">
      <apexchart
        type="line"
        height="420"
        :options="chartOptions"
        :series="series"
      ></apexchart>
    </div>
  </div>
</template>

<script>
import VueApexCharts from 'vue-apexcharts'

export default {
  components: {
    apexchart: VueApexCharts,
  },
  data: function () {
    return {
      series: [
        {
          name: 'Booked',
          type: 'column',
          data: [51020, 13850, 11630, 23820, 59530],
        },
        {
          name: 'Invoiced',
          type: 'line',
          data: [51020, 13850, 11630, 23820, 59530],
        },
      ],
      chartOptions: {
        chart: {
          type: 'line',
          height: 420,
        },
        title: {
          text: 'Booked vs invoiced',
          align: 'left',
        },
        subtitle: {
          text: 'Two independently scaled axes can land both labels on the same row; dataLabels.avoidOverlap keeps them legible',
          align: 'left',
        },
        colors: ['#8bc34a', '#ef5350'],
        stroke: {
          width: [0, 2],
        },
        fill: {
          opacity: [0.35, 1],
        },
        markers: {
          size: [0, 4],
        },
        dataLabels: {
          enabled: true,
          background: {
            enabled: true,
            borderWidth: 0,
          },
          formatter: function (val) {
            return (
              '$' +
              (val / 1000).toLocaleString('en-US', {
                minimumFractionDigits: 2,
                maximumFractionDigits: 2,
              }) +
              'K'
            )
          },
        },
        xaxis: {
          categories: [
            'May 2026',
            'Jun 2026',
            'Jul 2026',
            'Aug 2026',
            'Sep 2026',
          ],
        },
        yaxis: [
          {
            seriesName: 'Booked',
            title: {
              text: 'Booked',
            },
            labels: {
              formatter: function (val) {
                return '$' + (val / 1000).toFixed(0) + 'K'
              },
            },
          },
          {
            seriesName: 'Invoiced',
            opposite: true,
            title: {
              text: 'Invoiced',
            },
            labels: {
              formatter: function (val) {
                return '$' + (val / 1000).toFixed(0) + 'K'
              },
            },
          },
        ],
      },
    }
  },
}
</script>

<style>
#chart {
  max-width: 650px;
  margin: 35px auto;
}
</style>