Question

How to get the day of the year from date in TypeScript

Answer 1

function getDayOfYear(date = new Date()) {
  const dateMilliseconds = Date.UTC(
        date.getFullYear(),
        date.getMonth(),
        date.getDate(),
  );
   
  const YearMilliseconds = Date.UTC(date.getFullYear(), 0, 0);
 
  const days = (dateMilliseconds - YearMilliseconds) / 1000 / 60 / 60 / 24;
 
  return days;
}
 
 
console.log(getDayOfYear(new Date('2022-01-7'))); 
console.log(getDayOfYear(new Date('2022-02-4'))); 
console.log(getDayOfYear(new Date('2022-12-31'))); 
 
   
   
   
   
/*
run:
   
7 
35 
365 
   
*/

 

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