Echarts数据数组常用的时间计算函数

function getVirtulData(year) {
    year = year || '2020';
    var date = +echarts.number.parseDate(year + '-01-01');
    var end = +echarts.number.parseDate((+year + 1) + '-01-01');
    var dayTime = 3600 * 24 * 1000;
    var data = [];
    for (var time = date; time