series 清空后有残影echarts effectScatter配置项内容和展示

设置为 series 为空数组后，迁徙图有残影。

      option = {
    bmap: {
        center: [106.631881, 26.642758],
        zoom: 11,
        resizeEnable: true,
        roam: true,
        mapStyle: {
            'styleJson': [{
                    'featureType': 'water',
                    'elementType': 'all',
                    'stylers': {
                        'color': '#031628'
                    }
                },
                {
                    'featureType': 'land',
                    'elementType': 'geometry',
                    'stylers': {
                        'color': '#000102'
                    }
                },
                {
                    'featureType': 'highway',
                    'elementType': 'all',
                    'stylers': {
                        'visibility': 'off'
                    }
                },
                {
                    'featureType': 'arterial',
                    'elementType': 'geometry.fill',
                    'stylers': {
                        'color': '#000000'
                    }
                },
                {
                    'featureType': 'arterial',
                    'elementType': 'geometry.stroke',
                    'stylers': {
                        'color': '#0b3d51'
                    }
                },
                {
                    'featureType': 'local',
                    'elementType': 'geometry',
                    'stylers': {
                        'color': '#000000'
                    }
                },
                {
                    'featureType': 'railway',
                    'elementType': 'geometry.fill',
                    'stylers': {
                        'color': '#000000'
                    }
                },
                {
                    'featureType': 'railway',
                    'elementType': 'geometry.stroke',
                    'stylers': {
                        'color': '#08304b'
                    }
                },
                {
                    'featureType': 'subway',
                    'elementType': 'geometry',
                    'stylers': {
                        'lightness': -70
                    }
                },
                {
                    'featureType': 'building',
                    'elementType': 'geometry.fill',
                    'stylers': {
                        'color': '#000000'
                    }
                },
                {
                    'featureType': 'all',
                    'elementType': 'labels.text.fill',
                    'stylers': {
                        'color': '#857f7f'
                    }
                },
                {
                    'featureType': 'all',
                    'elementType': 'labels.text.stroke',
                    'stylers': {
                        'color': '#000000'
                    }
                },
                {
                    'featureType': 'building',
                    'elementType': 'geometry',
                    'stylers': {
                        'color': '#022338'
                    }
                },
                {
                    'featureType': 'green',
                    'elementType': 'geometry',
                    'stylers': {
                        'color': '#062032'
                    }
                },
                {
                    'featureType': 'boundary',
                    'elementType': 'all',
                    'stylers': {
                        'color': '#465b6c'
                    }
                },
                {
                    'featureType': 'manmade',
                    'elementType': 'all',
                    'stylers': {
                        'color': '#022338'
                    }
                },
                {
                    'featureType': 'label',
                    'elementType': 'all',
                    'stylers': {
                        'visibility': 'off'
                    }
                }
            ]
        }
    },
    series: [{
            name: 'POINT',
            type: 'effectScatter',
            coordinateSystem: 'bmap',
            rippleEffect: {
                brushType: 'stroke',
                period: 4,
                scale: 4
            },
            label: {
                show: false,
                position: 'right',
                formatter: '{b}'
            },
            itemStyle: {
                color: '#3ed4ff'
            },
            data: [{
                    kind: 'POINT',
                    name: '乌当区',
                    value: [106.821057, 26.669621, 1058]
                },
                {
                    kind: 'POINT',
                    name: '贵阳市',
                    value: [106.703183, 26.781471, 2140]
                },
                {
                    kind: 'POINT',
                    name: '观山湖区',
                    value: [106.549319, 26.659037, 2822]
                },
                {
                    kind: 'POINT',
                    name: '云岩区',
                    value: [106.724528, 26.604744, 4699]
                },
                {
                    kind: 'POINT',
                    name: '南明区',
                    value: [106.774703, 26.541612, 4886]
                },
                {
                    kind: 'POINT',
                    name: '修文县',
                    value: [106.591841, 26.838995, 820]
                },
                {
                    kind: 'POINT',
                    name: '白云区',
                    value: [106.678219, 26.727732, 1721]
                }
            ],
            tooltip: {
                show: true
            }
        },
        {
            name: 'POINT2',
            type: 'effectScatter',
            coordinateSystem: 'bmap',
            rippleEffect: {
                brushType: 'stroke',
                period: 4,
                scale: 4
            },
            label: {
                show: false,
                position: 'right',
                formatter: '{b}'
            },
            itemStyle: {
                color: '#ffa022'
            },
            data: [{
                    kind: 'POINT2',
                    name: 'AAA',
                    value: [106.800718, 26.633137, 1058]
                },
                {
                    kind: 'POINT2',
                    name: 'BBB',
                    value: [106.597621, 26.719608, 2140]
                },
                {
                    kind: 'POINT2',
                    name: 'CCC',
                    value: [106.561509, 26.784871, 15460]
                }
            ]
        },
        {
            name: 'AAA',
            type: 'lines',
            coordinateSystem: 'bmap',
            animation: false,
            effect: {
                show: true,
                period: 4,
                trailLength: 0.02,
                symbol: 'arrow',
                symbolSize: 6,
                color: '#3ed4ff'
            },
            lineStyle: {
                color: '#3ed4ff',
                width: 1,
                opacity: 1,
                curveness: 0.3
            },
            data: [{
                coords: [
                    [106.821057, 26.669621],
                    [106.800718, 26.633137]
                ]
            }]
        },
        {
            name: 'BBB',
            type: 'lines',
            coordinateSystem: 'bmap',
            animation: false,
            effect: {
                show: true,
                period: 4,
                trailLength: 0.02,
                symbol: 'arrow',
                symbolSize: 6,
                color: '#ffa022'
            },
            lineStyle: {
                color: '#ffa022',
                width: 1,
                opacity: 1,
                curveness: 0.3
            },
            data: [{
                coords: [
                    [106.703183, 26.781471],
                    [106.597621, 26.719608]
                ]
            }]
        },
        {
            name: 'CCC',
            type: 'lines',
            coordinateSystem: 'bmap',
            animation: false,
            effect: {
                show: true,
                period: 4,
                trailLength: 0.02,
                symbol: 'arrow',
                symbolSize: 6,
                color: '#a6c84c'
            },
            lineStyle: {
                color: '#a6c84c',
                width: 1,
                opacity: 1,
                curveness: 0.3
            },
            data: [{
                    coords: [
                        [106.549319, 26.659037],
                        [106.561509, 26.784871]
                    ]
                },
                {
                    coords: [
                        [106.724528, 26.604744],
                        [106.561509, 26.784871]
                    ]
                },
                {
                    coords: [
                        [106.774703, 26.541612],
                        [106.561509, 26.784871]
                    ]
                },
                {
                    coords: [
                        [106.703183, 26.781471],
                        [106.561509, 26.784871]
                    ]
                },
                {
                    coords: [
                        [106.591841, 26.838995],
                        [106.561509, 26.784871]
                    ]
                },
                {
                    coords: [
                        [106.678219, 26.727732],
                        [106.561509, 26.784871]
                    ]
                }
            ]
        }
    ]
}

setTimeout(function() {
    alert('开始清空series aaa');
    const opts = echarts.util.clone(option)
    opts.series = []
    myChart.setOption(opts);
}, 5000);

setTimeout(function() {
    alert('开始清空series bbb');
    const opts = echarts.util.clone(option)
    opts.series = []
    myChart.setOption(opts, true);
}, 10000);