Echarts自定义地图点击事件

&lt;!DOCTYPE html&gt;
&lt;html lang="en"&gt;
&lt;head&gt;
    &lt;meta charset="UTF-8"&gt;
    &lt;meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Echarts自定义地图点击事件</title>
    <style>
        body {
            margin: 0;
        }
        #chart {
            width: 100vw;
            height: 100vh;
        }
    </style>
</head>
<body>
    <div id="chart"></div>
    <script src="../lib/jquery.js"></script>
    <script src="../lib/echarts.min.js"></script>
    <script>
        var chartDom = document.getElementById('chart');
        var myChart = echarts.init(chartDom);
        var option;

        myChart.showLoading();
        $.get('https://geo.datav.aliyun.com/areas_v3/bound/450700_full.json', function (geoJson) {
        myChart.hideLoading();
        echarts.registerMap('GuilLin', geoJson);
        myChart.setOption(
            (option = {
            title: {
                text: 'Echats自定义地图点击事件',
            },
            tooltip: {
                trigger: 'item',
                formatter: '{b}<br/>{c} (p / km2)'
            },
            toolbox: {
                show: true,
                orient: 'vertical',
                left: 'right',
                top: 'center',
                feature: {
                dataView: { readOnly: false },
                restore: {},
                saveAsImage: {}
                }
            },
            visualMap: {
                min: 800,
                max: 50000,
                text: ['High', 'Low'],
                realtime: false,
                calculable: true,
                inRange: {
                color: ['lightskyblue', 'yellow', 'orangered']
                }
            },
            series: [
                {
                name: '桂林市',
                type: 'map',
                map: 'GuilLin',
                label: {
                    show: true
                },
                data: [
                    { name: '钦南区', value: 20057.34 },
                    { name: '钦北区', value: 15477.48 },
                    { name: '灵山县', value: 1980.98 },
                    { name: '浦北县', value: 9172.94 }
                ],
                }
            ]
            })
        );
        });

        option &amp;&amp; myChart.setOption(option);

        myChart.on('click', function (params) {
            const idx = params.dataIndex;
            console.log(idx, params.name, params.value);
            // to do
        });

    </script>
</body>
</html>