get months end date in javascript code example

Example 1: javascript get current month start and end date

var date = new Date();
var firstDay = new Date(date.getFullYear(), date.getMonth(), 1);
var lastDay = new Date(date.getFullYear(), date.getMonth() + 1, 0);

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