实现效果：

html：

<divref="echartOne"id="echartOne"style="width: 100%; height: 100%"
></div>

js:

    getEchartOne() {let chart = this.$echarts.init(this.$refs.echartOne);chart.setOption({title: {text: "Stacked Line"},tooltip: {trigger: "axis"},legend: {data: ["Email", "Union Ads", "Video Ads", "Direct", "Search Engine"]},grid: {left: "3%",right: "4%",bottom: "3%",containLabel: true},toolbox: {feature: {saveAsImage: {}}},xAxis: {type: "category",boundaryGap: false,data: ["Mon", "Tue", "Wed", "Thu", "Fri", "Sat", "Sun"]},yAxis: {type: "value"},series: [{name: "Email",type: "line",stack: "Total",data: [120, 132, 101, 134, 90, 230, 210]},{name: "Union Ads",type: "line",stack: "Total",data: [220, 182, 191, 234, 290, 330, 310]},{name: "Video Ads",type: "line",stack: "Total",data: [150, 232, 201, 154, 190, 330, 410]},{name: "Direct",type: "line",stack: "Total",data: [320, 332, 301, 334, 390, 330, 320]},{name: "Search Engine",type: "line",stack: "Total",data: [820, 932, 901, 934, 1290, 1330, 1320]}]});
//自适应部分window.addEventListener('resize', function () {chart.resize()     
})},

补充知识点：

更改标题，图例的颜色，x轴和y轴的颜色变为白色

{title: {text: ""},tooltip: {trigger: "axis",axisPointer: {type: "shadow"}},legend: {textStyle: {fontSize: 12,color: "#FFFFFF"}},grid: {left: "3%",right: "4%",bottom: "3%",containLabel: true},xAxis: [{type: "category",boundaryGap: [0, 0.01],data: citylist,// axisLabel: {//     color: fontColor,//     color: '#FFFFFF',//   },axisLine: {show: true,lineStyle: {color: "#FFFFFF"}}}],yAxis: {type: "value",axisLine: {show: false,lineStyle: {color: "white"}}},series: [{name: "产品个数/个",type: "bar",data: sumList,textStyle: {color: "#00FFFF"},itemStyle: {normal: {color: "#00FFFF"}}},{name: "溯源次数/次",type: "bar",data: numList,itemStyle: {normal: {color: "#FFFF00"}}}]}