📅  最后修改于: 2022-03-11 15:01:35.945000             🧑  作者: Mango
var lastday = function(y,m){
return new Date(y, m +1, 0).getDate();
}
console.log(lastday(2014,0));
console.log(lastday(2014,1));
console.log(lastday(2014,11));