vue3でamCharts4を使いたい→使えた

そもそも、まず「使えるかどうか知りたかった」んですがggっても出てこなかったのでメモです。
vue3でamChart4、使えました。（少なくとも表示はできました。）

公式を元に
https://www.amcharts.com/docs/v4/getting-started/integrations/using-vue-js/
beforeDestroyをbeforeUnmountに変更したら表示までは少なくともいけました。

<template>
  <div class="hello" ref="chartdiv">
  </div>
</template>

<script>
import * as am4core from "@amcharts/amcharts4/core";
import * as am4charts from "@amcharts/amcharts4/charts";
import am4themes_animated from "@amcharts/amcharts4/themes/animated";

am4core.useTheme(am4themes_animated);


export default {
  name: 'HelloWorld',
  mounted() {
    let chart = am4core.create(this.$refs.chartdiv, am4charts.XYChart);

    chart.paddingRight = 20;

    let data = [];
    let visits = 10;
    for (let i = 1; i < 366; i++) {
      visits += Math.round((Math.random() < 0.5 ? 1 : -1) * Math.random() * 10);
      data.push({ date: new Date(2018, 0, i), name: "name" + i, value: visits });
    }

    chart.data = data;

    let dateAxis = chart.xAxes.push(new am4charts.DateAxis());
    dateAxis.renderer.grid.template.location = 0;

    let valueAxis = chart.yAxes.push(new am4charts.ValueAxis());
    valueAxis.tooltip.disabled = true;
    valueAxis.renderer.minWidth = 35;

    let series = chart.series.push(new am4charts.LineSeries());
    series.dataFields.dateX = "date";
    series.dataFields.valueY = "value";

    series.tooltipText = "{valueY.value}";
    chart.cursor = new am4charts.XYCursor();

    let scrollbarX = new am4charts.XYChartScrollbar();
    scrollbarX.series.push(series);
    chart.scrollbarX = scrollbarX;

    this.chart = chart;
  },
  // ここが公式ではbeforeDestroy
  beforeUnmount() {
    if (this.chart) {
      this.chart.dispose();
    }
  }
}
</script>

<!-- Add "scoped" attribute to limit CSS to this component only -->
<style scoped>
.hello {
  width: 100%;
  height: 500px;
}
</style>

使えそうです。よかった。

追記：
amCharts4の月を数字にしたい＆日本語化（vue3）
https://qiita.com/AyakoKataoka/items/31382d7c283d753afd39