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fhefh2015/getYearWeek.js

Created September 26, 2020 08:16
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JS将日期转换成当年的周数（work week）
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getYearWeek.js
// 时间格式 yyyy-MM-dd
function getYearWeek(date) {
var date = new Date(date);
var date2 = new Date(date.getFullYear(), 0, 1);
var day1 = date.getDay();
if (day1 == 0) day1 = 7;
var day2 = date2.getDay();
if (day2 == 0) day2 = 7;
d = Math.round((date.getTime() - date2.getTime() + (day2 - day1) * (24 * 60 * 60 * 1000)) / 86400000);
return Math.ceil(d / 7) + 1;
}
console.log(getYearWeek("2020-09-07")); //37
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