polyline 示意echarts custom配置项内容和展示

      option = {
    geo: {
        type:'map',  
        map: 'china',
    },
		series : [
        {
            type: 'custom',
            coordinateSystem: 'geo',
            renderItem: (params, api)=>{
                var rect_width = 100;
                var rect_height = 100;

                var point = api.coord(api.value(0).split(','));
                var points = api.value(1).split('||').map(function(item){
                    return api.coord(item.split(','));
                });

                var title = api.value(2);
                var text = api.value(3);

                return {
                    type: 'group',
                    children: [
                        {
                            type: 'rect',
                            shape: {
                                x: point[0] - rect_width/2,
                                y: point[1] - rect_height/2,
                                width : rect_width,
                                height: rect_height,
                            },
                            style: {
                                stroke: '#999',
                                fill: '#fff',
                            }
                        },
                        {
                            type: 'text',
                            style :{
                                x: point[0] - rect_width/2 + 10,
                                y: point[1] - rect_height/2 + 20,
                                text: title + '\n' + text,
                            },
                        },
                        {
                            type: 'polyline',
                            shape: {
                                points: points
                            },
                            style: {
                                stroke: 'red',
                                lineWidth: 2,
                                fill: null
                            }
                        }
                    ]
                }
            },
            data: [
                ['80.00,20.00', '85.00,20.00||90.00,20.00||95.00,30.00', '西南', '指标1：1.234\n指标2：1.345' ]
            ],
        }
    ]
};