svg path symbol.echarts 折线配置项内容和展示

      option = {
    backgroundColor: '#151E45',
    xAxis: {
        data: ['Sun', 'Mon', 'Tue', 'Wed', 'Thu', 'Fri', 'Sat']
    },
    yAxis: {
        splitLine: {
            lineStyle: {
                color: 'rgba(255,255,255,0.3)'
            }
        },
        axisLabel: {
            color: 'rgba(255,255,255,0.3)'
        },
        axisLine: {
            lineStyle: {
                color: 'rgba(255,255,255,0.3)'
            }
        },
        axisTick: {
            lineStyle: {
                color: 'rgba(255,255,255,0.3)'
            }
        }
    },
    series: [{
        type: 'line',
        symbol: 'path://M 50 10 A 40 40 0 1 0 50 90 A 40 40 0 1 0 50 10 Z M 50 20 A 30 30 0 1 1 50 80 A 30 30 0 1 1 50 20 Z',
        symbolSize: 15,
        lineStyle: {
            color: '#38A4CC'
        },
        itemStyle: {
            color: '#38A4CC'
        },
        data:[220, 182, 191, 234, 290, 330, 310]
    }]
};