得到今天的第一天，最後一天

Question

如何得到今天的日期，本月的第一天和本月的最後一天？

Answer 1

see fiddle

var current = new Date();   // this one's pretty self explanatory 

console.log('current: ' + current); 

var last = new Date(); 
last.setMonth(last.getMonth() + 1); // go to next month 
last.setDate(0);     // setting date to 0 is last day of previous month 

console.log('last: ' + last); 

var first = new Date(); 
first.setDate(1);     // setting date to 1 is first day of current month 

console.log('first: ' + first); 

Answer 2

看一看的Date對象：https://developer.mozilla.org/en/JavaScript/Reference/Global_Objects/Date