js获取当前时间是本年的第几天第几周

 

let d1 = new Date()

let d2 = new Date()

d2.setMonth(0)

d2.setDate(1)

let rq = d1-d2

let s1 = Math.ceil(rq/(24*60*60*1000))

let s2 = Math.ceil(s1/7)

console.log('第' + s1 + '天,第' + s2 + '周')