javascript get current month number of days code example

Example 1: how to get the number of days in a month in javascript

// instantiate a date object
 var dt = new Date();

// dt.getMonth() will return a month between 0 - 11
// we add one to get to the last day of the month 
// so that when getDate() is called it will return the last day of the month
 var month = dt.getMonth() + 1;
 var year = dt.getFullYear();

// this line does the magic (in collab with the lines above)
 var daysInMonth = new Date(year, month, 0).getDate();

Example 2: get current month of year in number javascript

var today = new Date();
var month = today.getMonth(); // Returns 9
console.log(month); // Output: 9