Question

How to check if a date is the first day of the month in JavaScript

Answer 1

function isFirstDayOfMonth(dt = new Date()) {
  	return dt.getDate() === 1;
}


console.log(isFirstDayOfMonth(new Date('2022-03-01')));

console.log(isFirstDayOfMonth(new Date('2022-03-04')));




/*
run:

true
false

*/

 

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