日期验证 - 日期对象与输入不同

Question

我正在使用几年前编写的脚本来检查日期是否有效：

//These values are comming from user input
var _day = 19;
var _month = 9; //October (10 - 1 for javascript Date object sake)
var _year = 1986;
var _hour = 0;
var _minute = 0;
var _second = 0;
var result;
    
//Checks if date is valid
var _datetime = new Date(_year, _month, _day, _hour, _minute, _second);
var _valid = 
    	_day == _datetime.getDate() 
    	&& _month == _datetime.getMonth() 
    	&& _year == _datetime.getFullYear() 
    	&& _hour == _datetime.getHours() 
    	&& _minute == _datetime.getMinutes() 
    	&& _second == _datetime.getSeconds();
    	
if(_valid){
  result = 'valid';
}else{
  result = 'invalid';
}

document.write('The date ' + _datetime + ' is ' + result);

此日期显示为无效，因为_datetime.getHours()正在返回1而不是0。

如果我将_day值更改为 18 或 20 ，则日期会正确验证。我只是看不出有什么问题。

Answer 1

可能是时区问题，请尝试UTC。

＆＃13;

＆＃13;

//These values are comming from user input
var _day = 19;
var _month = 9;
var _year = 1986;
var _hour = 0;
var _minute = 0;
var _second = 0;

//Checks if date is valid
var _datetime = new Date(Date.UTC(_year, _month, _day, _hour, _minute, _second));
var _valid = 
    _day == _datetime.getUTCDate() 
    && _month == _datetime.getUTCMonth() 
    && _year == _datetime.getUTCFullYear() 
    && _hour == _datetime.getUTCHours() 
    && _minute == _datetime.getUTCMinutes() 
    && _second == _datetime.getUTCSeconds();


if(_valid){
    console.log('User input is valid');
}else{
    console.log('Invalid date');
}

＆＃13;

＆＃13;

＆＃13;