echarts中series的循环显示

https://www.echartsjs.com/examples/zh/editor.html?c=line-stack
将代码复制到此地址就可以看到效果
var products = ['邮件营销', '联盟广告', '视频广告', '直接访问', '搜索引擎'];
var keys = ['周一', '周二', '周三', '周四', '周五', '周六', '周日'];
var datas = [
[120, 132, 101, 134, 90, 230, 210],
[220, 182, 191, 234, 290, 330, 310],
[150, 232, 201, 154, 190, 330, 410],
[320, 332, 301, 334, 390, 330, 320],
[820, 932, 901, 934, 1290, 1330, 1320]
]

var series = [
{
name: products[0],
type: 'line',
stack: '总量',
data: datas[0]
},
{
name: products[1],
type: 'line',
stack: '总量',
data: datas[1]
},
{
name: products[2],
type: 'line',
stack: '总量',
data: datas[2]
},
{
name: products[3],
type: 'line',
stack: '总量',
data: datas[3]
},
{
name: products[4],
type: 'line',
stack: '总量',
data: datas[4]
}
]

var seriesArr = [];
for(var i = 0; i<products.length; i++){
seriesArr.push({
name: products[i],
type: 'line',
stack: '总量',
// data:[120, 132, 101, 134, 90, 230, 210]
data: datas[i]
});
}

option = {
title: {
text: '折线图堆叠'
},
tooltip: {
trigger: 'axis'
},
legend: {
data: products
},
grid: {
left: '3%',
right: '4%',
bottom: '3%',
containLabel: true
},
toolbox: {
feature: {
saveAsImage: {}
}
},
xAxis: {
type: 'category',
boundaryGap: false,
data: keys
},
yAxis: {
type: 'value'
},
series: seriesArr
};