以周一为每周的第一天。
function getWeekOfYear(){
var today = new Date();
var firstDay = new Date(today.getFullYear(),0, 1);
var dayOfWeek = firstDay.getDay();
var spendDay= 1;
if (dayOfWeek !=0) {
spendDay=7-dayOfWeek+1;
}
firstDay = new Date(today.getFullYear(),0, 1+spendDay);
var d =Math.ceil((today.valueOf()- firstDay.valueOf())/ 86400000);
var result =Math.ceil(d/7);
return result+1;
};
function getWeekOfYear(){
var today = new Date();
var firstDay = new Date(today.getFullYear(),0, 1);
var dayOfWeek = firstDay.getDay();
var spendDay= 1;
if (dayOfWeek !=0) {
spendDay=7-dayOfWeek+1;
}
firstDay = new Date(today.getFullYear(),0, 1+spendDay);
var d =Math.ceil((today.valueOf()- firstDay.valueOf())/ 86400000);
var result =Math.ceil(d/7);
return result+1;
};
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