1.JS获取当前是今年的第几天，今年的第几周
var d1 = new Date();
var d2 = new Date();
d2.setMonth(0);
d2.setDate(1);
var rq = d1-d2;
var s1 = Math.ceil(rq/(24*60*60*1000));
var s2 = Math.ceil(s1/7);
alert("今天是本年第"+s1+"天，第"+s2+"周");
2.获取周别(直接保存成Html)
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title></title>
</head>
<body>
<script>
'use strict';
function formatDig(num){
return num>9?''+num:'0'+num;
}
function formatDate(mill){
var y=new Date(mill);
let raws= [
y.getFullYear(),
formatDig(y.getMonth()+1),
formatDig(y.getDate()),
// y.getDay()||7
];
// let format=['年','月','日 星期'];
let format=['-','-',''];
return String.raw({raw:raws},...format);
}
function* createWeeks(year){
const ONE_DAY=24*3600*1000;
let start=new Date(year,0,1),
end=new Date(year,11,31);
let firstDay=start.getDay()|| 7,
lastDay=end.getDay()||7;
let startTime=+start,
endTime=startTime+(7-firstDay)*ONE_DAY,
_endTime=end-(7-lastDay)*ONE_DAY;
yield [startTime,endTime];
startTime=endTime+ONE_DAY;
endTime=endTime+7*ONE_DAY;
while(endTime<_endTime){
yield [startTime,endTime];
startTime=endTime+ONE_DAY;
endTime=endTime+7*ONE_DAY;
}
yield [startTime,+end];
}
let index=1;
var year_mm = '2017';
var data1_mm = '';
var data2_mm = '';
var datamm_year = {};
for(let i of createWeeks(year_mm)){
let start=i[0],
end=i[1];
//console.log(`w${formatDig(index++)} ${formatDate(start)}/${formatDate(end)}`);
data1_mm = `w${formatDig(index++)}`;
data2_mm = `${formatDate(start)}/${formatDate(end)}`;
datamm_year[data1_mm] = data2_mm;
}
console.log(datamm_year);
</script>
</body>
</html>
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