饼图在负数情况下出现斜线echarts 饼配置项内容和展示

饼图在负数情况下出现斜线

      var option = {
    series: [{
        color:["#02A9ED","#DCDCDC"],
        name: '访问来源',
        type: 'pie',
        radius: ['80%', '85%'],
        avoidLabelOverlap: false,
        label: {
            normal: {
                show: true,
                position: 'center'
            }
        },
        labelLine: {
            normal: {
                show: false
            }
        },
        data: [{
            value: '-10',
            name: '75%',
            label: {
                normal: {
                    formatter:function(param){
                        return param.value
                    },
                    textStyle: {
                        fontSize: '20',
                        color:'#0A5BDE',
                        fontWeight: 'bold'
                    }
                }
            },
            itemStyle:{
                normal:{
                    color:'#0A5BDE'
                }
            }
        },
            {
                value: '50',
                name: '同期',
                label: {
                    normal: {
                        show:false,
                    }
                },
                itemStyle:{
                    normal:{
                        color:'#02A9ED'
                    }
                }
            }
        ]
    }]
};