toolbox自定义图标问题echarts 折线配置项内容和展示

toolbox里倒入SVG自定义图标，以path://的方式倒入的。用iconStyle在echarts在线编辑器里可以改变颜色，但是本地无效，echarts版本是3.8的。

      var titleStyle = {
    color: '#545963',
    fontWeight: 'normal',
    fontSize: 16,
}

var toolboxStyle = {
    top: '6px',
    right: '6px',
    itemSize: 18,
    feature: {
        saveAsImage: {
            icon: 'path://M162.22,183.33H33.7a20.06,20.06,0,0,1-20-20V34.81a20.06,20.06,0,0,1,20-20H162.22a20.06,20.06,0,0,1,20,20V163.33A20.06,20.06,0,0,1,162.22,183.33ZM54.82,44.7A18.16,18.16,0,1,0,73,62.86,18.16,18.16,0,0,0,54.82,44.7Zm79.51,138.63L89.64,139.7,64.33,115,13.7,163.33m168.52-40L140.33,83.67l-50.7,56'
        }
    },
    iconStyle: {
        borderColor: '#cdd4de',
    }
}
// 指定图表的配置项和数据
var option = {
    tooltip: {
        trigger: 'axis'
    },
    title: {
        text: '转评赞数',
        textStyle: titleStyle,
        left: '10',
        top: '10',
    },
    legend: {
        top: '10px',
        right: '40px',
        itemGap: 20,
        itemWidth: 8,
        itemHeight: 8,
        icon: 'circle',
        data: ['转发', '评论', '点赞']
    },
    toolbox: toolboxStyle,
    grid: {
        left: '3%',
        right: '4%',
        bottom: '5%',
        containLabel: true
    },
    xAxis: [{
        type: 'category',
        axisLine: { //坐标轴轴线 默认 true,
            show: false
        },
        axisTick: { //坐标轴刻度
            show: false
        },
        axisLabel: { //坐标轴刻度标签
            show: true,
            //rotate: 30,  //旋转角度
            textStyle: {
                color: '#545963'
            }
        },
        boundaryGap: false,
        data: ['5-1', '5-2', '5-3', '5-4', '5-5', '5-6', '5-7']
    }],
    yAxis: [{
        type: 'value',
        axisLine: { //坐标轴轴线 默认 true,
            show: false
        },
        axisTick: { //坐标轴刻度
            show: false
        },
        splitLine: { //坐标轴刻度
            show: true,
            lineStyle: {
                color: '#ecf0f0',
                width: 1,
                type: 'dashed'
            }
        },
        axisLabel: { //坐标轴刻度标签
            show: true,
            //rotate: 30,  //旋转角度
            textStyle: {
                color: '#545963'
            }
        },
    }],
    series: [{
            name: '转发',
            type: 'line',
            symbol: 'circle',
            //symbol: 'emptyCircle',//圆圈
            symbolSize: 8,
            itemStyle: {
                normal: {
                    color: '#7540ee'
                }
            },
            lineStyle: {
                normal: {
                    color: '#7540ee',
                    width: 2,
                    type: 'solid'
                }
            },
            areaStyle: {
                normal: {
                    color: 'rgba(0,0,0,0.5)',
                    opacity: 0
                }
            },
            smooth: false,
            data: [220, 332, 101, 134, 90, 230, 310]
        },
        {
            name: '评论',
            type: 'line',
            symbol: 'circle',
            //symbol: 'emptyCircle',//圆圈
            symbolSize: 8,
            itemStyle: {
                normal: {
                    color: '#1e88e5'
                }
            },
            lineStyle: {
                normal: {
                    color: '#1e88e5',
                    width: 2,
                    type: 'solid'
                }
            },
            areaStyle: {
                normal: {
                    color: 'rgba(0,0,0,0.5)',
                    opacity: 0
                }
            },
            smooth: false,
            data: [420, 182, 191, 234, 290, 330, 110]
        },
        {
            name: '点赞',
            type: 'line',
            symbol: 'circle',
            //symbol: 'emptyCircle',//圆圈
            symbolSize: 8,
            itemStyle: {
                normal: {
                    color: '#2dc76d'
                }
            },
            lineStyle: {
                normal: {
                    color: '#2dc76d',
                    width: 2,
                    type: 'solid'
                }
            },
            areaStyle: {
                normal: {
                    color: 'rgba(0,0,0,0.5)',
                    opacity: 0
                }
            },
            smooth: false,
            data: [320, 282, 391, 134, 190, 230, 210]
        }

    ]
};