百度echarts饼图定时跳动，tooltip自动切换

<div id="main" style="width: 100%;height:100vh;"></div>
<script src="js/jquery-1.9.0.min.js"></script>
<script src="js/echarts.min.js"></script>
<script>
// 基于准备好的dom，初始化echarts实例
let index = 0;
var colorList = ['#73DDFF', '#73ACFF', '#FDD56A', '#FDB36A', '#FD866A', '#9E87FF', '#58D5FF'];
function fun() {
    var timer = setInterval(function() {
        console.log(index)
        myChart.dispatchAction({
            type: 'hideTip',
            seriesIndex: 0,
            dataIndex: index
        });
        // 显示提示框
        myChart.dispatchAction({
            type: 'showTip',
            seriesIndex: 0,
            dataIndex: index
        });
        // 取消高亮指定的数据图形
        myChart.dispatchAction({
            type: 'downplay',
            seriesIndex: 0,
            dataIndex: index == 0 ? 5 : index - 1
        });
        myChart.dispatchAction({
            type: 'highlight',
            seriesIndex: 0,
            dataIndex: index
        });
        index++;
        if (index > 5) {
            index = 0;
        }
    }, 3000)
}
fun()
var myChart = echarts.init(document.getElementById('main'));
var option = {
	title: {
        text: '定时跳动',
        x: 'center',
        y: 'center',
        textStyle: {
            fontSize: 20,
            color: '#fff'
        }
    },
    tooltip: {
        trigger: 'item'
    },
    series: [{
        type: 'pie',
        center: ['52%', '50%'],
        radius: ['40%', '60%'],
        clockwise: true,
        avoidLabelOverlap: true,
        hoverOffset: 20,
        emphasis:{
            itemStyle:{
                borderColor: '#071a44',
                borderWidth: 5
            }
        },
        itemStyle: {
            normal: {
                color: function(params) {
                    return colorList[params.dataIndex]
                }
            }
        },
        label: {
            show: true,
            position: 'outside',
            formatter: '{a|{b}：{d}%}\n{hr|}',
            rich: {
                hr: {
                    backgroundColor: 't',
                    borderRadius: 3,
                    width: 3,
                    height: 3,
                    padding: [3, 3, 0, -12]
                },
                a: {
                    padding: [-30, 15, -20, 15]
                }
            }
        },
        labelLine: {
            normal: {
                length: 20,
                length2: 30,
                lineStyle: {
                    width: 1
                }
            }
        },
        data: [{
            'name': '北京',
            'value': 5600
        }, {
            'name': '上海',
            'value': 3600
        }, {
            'name': '广州',
            'value': 1500
        }, {
            'name': '深圳',
            'value': 2000
        }, {
            'name': '未知',
            'value': 899
        }, {
            'name': '海外',
            'value': 4000
        }],
    }]
};

myChart.setOption(option);
window.addEventListener("resize", function () {
  myChart.resize();
});
</script>

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