CODEWITHSUNDEEP
javascripttime
Joe
Joe

Reputation: 4542

How to check if time is less than or equal to particular hour in JavaScript

I am trying to validate if the given time value is less than or equal to 13.

I get the values from UI like hour and minutes and am/pm.

How do I check if total hours does not exceed 13 in JavaScript?

After some calculation I have hour and minutes and I tried to validate as follows:

if ((fromHour != 13 & fromMinute == 0) & (toHour < fromHour & toMinute == 0)) //  
                {
                    alert("Time cannot be greater than 13 hours"); 
}

but it is not working as I expected. What do I need to change?

Upvotes: 1

Views: 1221

Answers (1)

Barmar
Barmar

Reputation: 782683

Convert the times to minutes by multiplying the hour by 60 and adding the minutes. Then subtract the times and see if it's less than 13*60. And if the times cross over midnight, so that the to time is lower than the from time, add the number of minutes in a day first.

fromTime = fromHour * 60 + fromMinute;
toTime = toHour * 60 * toMinute;
if (toTime < fromTime) {
    toTime += 60*24;
}
if (toTime - fromTime > 13*60) {
    alert("Time cannot be greater than 13 hours");
}

Upvotes: 1

Related Questions