Consider the following two strings:
var x = "01/15/2022 6:30 AM" var y = "01/14/2022 4:45 PM"
In JavaScript, how can I compare these strings to demonstrate that the time for var y occurs earlier than var x?
Consider the following two strings:
var x = "01/15/2022 6:30 AM" var y = "01/14/2022 4:45 PM"
In JavaScript, how can I compare these strings to demonstrate that the time for var y occurs earlier than var x?
Take the date stamp and convert it into UNIX time codes for comparison.
let firstDate = "11/24/2014 3:10 PM";
let secondDate = "11/23/2014 7:45 AM";
let firstUnixTime = new Date(firstDate).getTime();
let secondUnixTime = new Date(secondDate).getTime();
if (firstUnixTime < secondUnixTime) {
console.log('The event A took place before event B');
} else if (firstUnixTime > secondUnixTime) {
console.log('Event A happened after event B');
} else {
console.log('Both events occurred simultaneously');
}
To properly handle dates, you should convert them to DateType by referring to the code snippet below:
var date1 = "11/24/2014 3:10 PM";
var date2 = "11/23/2014 7:45 AM";
var parsedDate1= new Date(Date.parse(date1));
var parsedDate2 = new Date(Date.parse(date2));
if (parsedDate1 > parsedDate2){
alert(parsedDate1);
}else{
alert(parsedDate2);
}Give this a shot:
function adjustTime(){
var startTime = "10:30 PM";
var endTime = "12:30 PM";
// Adjust start time
startTime = startTime.split(" ");
var timeParts = startTime[0].split(":");
var adjustedStartTime = parseInt(timeParts[0]);
if(startTime[1] == "PM" && adjustedStartTime < 12) adjustedStartTime += 12;
startTime = adjustedStartTime + ":" + timeParts[1] + ":00";
// Adjust end time
endTime = endTime.split(" ");
var endTimeParts = endTime[0].split(":");
var adjustedEndTime = parseInt(endTimeParts[0]);
if(endTime[1] == "PM" && adjustedEndTime < 12) adjustedEndTime += 12;
endTime = adjustedEndTime + ":" + endTimeParts[1] + ":00";
// Check if times are valid
if (startTime != '' && endTime != '') {
alert(startTime);
alert(endTime);
if (endTime <= startTime) {
alert('Please select a valid time range');
}
}
}
After some tweaks, I have enhanced the code originally provided by Mohit Singh:
function checkTime() {
var stime2 = '';
var etime2 = '';
if ($("#txtRequestTimeStart").val() != '' && $("#txtRequestTimeStop").val() != '') {
var start_time = $("#txtRequestTimeStart").val();
var end_time = $("#txtRequestTimeStop").val();
start_time = start_time.split(" ");
var time = start_time[0].split(":");
var stime = time[0];
if (stime.length == 1) {
stime2 = "0" + stime;
if (start_time[1] == "PM" && stime2 < 12) stime2 = parseInt(stime2) + 12;
start_time = stime2 + ":" + time[1] + ":00";
}
else {
if (start_time[1] == "PM" && stime < 12) stime = parseInt(stime) + 12;
start_time = stime + ":" + time[1] + ":00";
}
end_time = end_time.split(" ");
var time1 = end_time[0].split(":");
var etime = time1[0];
if (etime.length == 1) {
etime2 = "0" + etime;
if (end_time[1] == "PM" && etime2 < 12) etime2 = parseInt(etime2) + 12;
end_time = etime2 + ":" + time1[1] + ":00";
}
else {
if (end_time[1] == "PM" && etime < 12) etime = parseInt(etime) + 12;
end_time = etime + ":" + time1[1] + ":00";
}
if (start_time != '' && end_time != '') {
if (end_time <= start_time) {
alert('Begin Time should not be greater than or equal to End Time');
}
}
}
}
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