将字符串转换为时间 JavaScript (h:m) [英] Convert string to time JavaScript (h:m)

问题描述

我和我的朋友正在做一个学校项目；任务是制作一个房间预订网站.这是我们第一年尝试 JavaScript，我们希望将字符串格式化为时间 (h:m).我们房间预订网站的用户可以选择他/她想要房间的时间，输出为:H:m(24 小时制:分钟).例如 12:15.

My friend and I are doing a school project; the task is to make a room-reservation-site. This is our first year trying JavaScript, and we want a string to be formatted into time (h:m). The user of our room-reservation-site can choose what time of the day he/she wants the room, and the output is: H:m (24hour-clock:minutes). For example 12:15.

因此我的问题是:是否可以将此字符串 (h:m) 转换为时间，并轻松检查用户是否输入了超过 30 分钟的预订时间?例如，我们可以说:

Therefor my question is: Is there possible to convert this string (h:m) into time, and easily check if the user typed more than 30minutes of booking-time? So we can for example say:

 if(start_of_reservation < start_of_reservation(+30minutes)){ 
   alert("You need to book a room atleast 30minutes"); }

 else if(start_of_reservation > start_of_reservation(+6hours)){ 
   alert("You can't book a room longer than 6 hours"); }

 else {
 // moving on..
 }

推荐答案

var year = '2013';
var month = '04';
var day = '18';

var hour = '12';
var min = '35';

var reserv = new Date(year,month,day,hour,min)

console.log(reserv);

您可能希望通过检查当前日期为自己获取那些年、月和日值.这纯粹是为了展示如何将字符串转换为日期.

Those year, month and day values you might want to fetch for yourselves by checking the current date. This is purely to show how to convert the string into a date.

使用reserv.getTime()转换为毫秒时间，从而可以比较两次；

Use reserv.getTime() to convert to milliseconds time and thus being able to compare two times;

reserv.getTime() - reserv2.getTime()

有关详细信息，请查看 MDN.

For more information, check the MDN.

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