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折线图

实际开发场景一：

只有一条折线，一半实线，一半虚线。

option = {tooltip: {trigger: "axis",formatter: (params: any) => {const { name, seriesName, value } = params.find((item: any) => item.value !== "-");return `${name}<br/>${seriesName}: ${value}元`;},},xAxis: {type: 'category',data: ['周一', '周二', '周三', '周四', '周五', '周六', '周日']},yAxis: {type: "value",name: "金额(元)"},series: [{name: "近30天金额",data: [120, 132, 191, 234, '-', '-', '-'],type: 'line',lineStyle: { type: 'solid', color: '#5470C6', width: 2 },itemStyle: { opacity: 0 }},// 虚线部分（后三天）{name: "未来7天预估金额",data: ['-', '-', '-', 234, 190, 220, 210],type: 'line',lineStyle: { type: 'dashed', color: '#5470C6', width: 2 },itemStyle: { opacity: 0 }}]
};