echarts圆环图

外环的渐变是内环的阴影

    var chartDom2 = document.getElementById('container-workcode2');
    var myChart2 = echarts.init(chartDom2);
    var option2;
    option2 = {
        tooltip: {
            trigger: 'item'
        },
        legend: {
            orient: 'vertical',
            top: '0%',
            left: 'center'
        },
        title: {
            text: '60%',
            subtext: "完成率",
            itemGap: 5,
            top: "40%",
            left: "center",
            zlevel: 3, //层级
            textStyle: {
                fontWeight: '700',
                color: '#0091FF',
                fontSize: '20'
            },
            subtextStyle: {
                color: "rgba(99,99,99,0.5)",
                fontSize: 14,
                top: "center"
            }
        },
        series: [
            {
                type: 'pie',
                zlevel: 2,
                radius: ['0', '50%'],
                itemStyle: {
                    normal: {
                        shadowBlur: 10,
                        shadowColor: 'rgba(0,0,0,.75)',
                        color: '#fff',
                        label: {
                            show: false
                        },
                        labelLine: {
                            show: false
                        }
                    },
                },
                hoverAnimation: false,
                data: [100],
            },
            {
                name: '完成率',
                type: 'pie',
                radius: ['50%', '60%'],
                avoidLabelOverlap: false,
                labelLine: {
                    show: false
                },
                data: [
                    { value: 60, name: '' },
                    { value: 40, name: '' }
                ],
                itemStyle: {
                    normal: {
                        color: function (params) {
                            var colorList = ['#2A9F85', '#F7B500'];
                            return colorList[params.dataIndex];
                        }
                    }
                }
            }
        ]
    };
    option2 && myChart2.setOption(option2);