javascript验证日期过去

Question

我想比较给定日期是过去还是将来。
给定日期来自yyyy-mm-dd格式的字符串。
我试图“平衡”今天并补偿给定日期的时区，但我确定必须有更好的方法来解决这个问题。

var today   = new Date(); 
console.log("TODAY: " + today); // Mon Apr 28 2014 14:46:41 GMT+0200 (CEST) 
var todayYear  = today.getFullYear(); 
var todayMonth  = today.getMonth(); 
todayMonth   = parseInt(todayMonth, 10) + 1; 
var todayDay  = today.getDate(); 
var todayFormatted = todayYear + "-" + todayMonth + "-" + todayDay; 
today    = new Date(todayFormatted); 
console.log("TODAY: " + today); // Mon Apr 28 2014 00:00:00 GMT+0200 (CEST) 
var testDate  = new Date("2014-04-28"); 
console.log("TEST: " + testDate); // Mon Apr 28 2014 02:00:00 GMT+0200 (CEST) 
testDate.setHours(00); 
console.log("TEST: " + testDate); 
// check if test is in the past 
(testDate < today) ? console.log('test is in the past') : console.log('test is NOT in the past'); 

Answer 1

您可以比较的 “Unix时代” 数学：

var today = new Date(); 
console.log(testDate.getTime() < today.getTime() 
? 'test is in the past' 
: 'test is NOT in the past');