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isLeapYear javascript Code Snippet in 2024

datebeginner

Last Updated: 4 June 2024

Checks if the given year is a leap year.

  • Use new Date(), setting the date to February 29th of the given year.
  • Use Date.prototype.getMonth() to check if the month is equal to 1.
const isLeapYear = year => new Date(year, 1, 29).getMonth() === 1;
isLeapYear(2019); // false isLeapYear(2020); // true

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