function timestamp(y,m,d){
return dayjs(new Date(y,m-1,d)).unix()*1000
}
function computed(_a,_b){
let [a,b] = [_a,_b].sort((prev,next)=>prev[0]-next[0])
const time_arr = [...a,...b].sort((c,d)=>c-d)
const a_len = a[1] - a[0]
const b_len = b[1] - b[0]
const diff = Math.abs(b[0] - a[1])
const total_len =a_len+b_len+diff
const real_len = Math.abs(b[1] - a[0])
if(real_len===total_len) return null
return time_arr.concat().splice(1,2)
}
const result = computed(
[timestamp(2026,6,2),timestamp(2001,6,1),],
[timestamp(2020,8,15),timestamp(2020,9,13)]
)
if(result){
console.log(
dayjs(result[0]).format('YYYY-MM-DD'),
dayjs(result[1]).format('YYYY-MM-DD'),
)
}else{
console.log('没有交集')
}
console