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Javascript compatibility with desktop Safari [duplicate]

This question already has answers here:
Why does Date.parse give incorrect results?
(11 answers)
Closed 3 years ago.
I wrote the following code for displaying a different image depending on the date (right now this example just console logs a message). The code works fine in Chrome and Firefox on Mac, but does not work correctly or give any errors on Safari (in Safari the message does not change depending on the date, it just says the same). How is Safari processing this differently? How can I get this to work on Safari with minimal changes?
Here's a working repl.
Here's the code:
/* change these dates */
var ddt = new Date("2019, 8, 22");
var pre = new Date("2019, 8, 23");
var ton = new Date("2019, 8, 26");
var post = new Date("2019, 8, 27");
// todays date
var currDate = new Date();
var mm = currDate.getMonth() + 1;
var dd = currDate.getDate();
var yyyy = currDate.getFullYear();
// Get the date parts
var ddtDay = ddt.getDate();
var ddtMonth = ddt.getMonth() + 1;
var ddtYear = ddt.getFullYear();
//console.log(ddtYear, ddtMonth, ddtDay);
var preDay = pre.getDate();
var preMonth = pre.getMonth() + 1;
var preYear = pre.getFullYear();
//console.log(preYear, preMonth, preDay);
var tonDay = ton.getDate();
var tonMonth = ton.getMonth() + 1;
var tonYear = ton.getFullYear();
//console.log(tonYear, tonMonth, tonDay);
var postDay = post.getDate();
var postMonth = post.getMonth() + 1;
var postYear = post.getFullYear();
//console.log(postYear, postMonth, postDay);
// format the date parts
if (ddtDay < 10) {
ddtDay = '0' + ddtDay;
}
if (ddtMonth < 10) {
ddtMonth = '0' + ddtMonth;
}
if (preDay < 10) {
preDay = '0' + preDay;
}
if (preMonth < 10) {
preMonth = '0' + preMonth;
}
if (tonDay < 10) {
tonDay = '0' + tonDay;
}
if (tonMonth < 10) {
tonMonth = '0' + tonMonth;
}
if (postDay < 10) {
postDay = '0' + postDay;
}
if (tonMonth < 10) {
postMonth = '0' + postMonth;
}
if (dd < 10) {
dd = '0' + dd;
}
if (mm < 10) {
mm = '0' + mm;
}
var ddtF = (ddtYear + '-' + ddtMonth + '-' + ddtDay);
var preF = (preYear + '-' + preMonth + '-' + preDay);
var tonF = (tonYear + '-' + tonMonth + '-' + tonDay);
var postF = (postYear + '-' + postMonth + '-' + postDay);
var today = (yyyy + '-' + mm + '-' + dd);
console.log(ddtF);
console.log(preF);
console.log(tonF);
console.log(postF);
console.log(today);
// logic
if (today >= postF) {
console.log('post');
} else if (today === tonF) {
console.log('ton');
} else if (today < tonF && today >= preF) {
console.log('pre');
} else if (today <= ddtF) {
console.log('ddt');
}

"2019, 8, 22" is not a portable date format. The Date constructor has a portable calling sequence where you give each component of the date as a separate argument, so use
var ddt = new Date(2019, 7, 22);
and similarly for all the other variables.
And remember that months are counted from 0 in JavaScript, so you need to subtract 1 from the month argument (August is 7).
/* change these dates */
var ddt = new Date(2019, 7, 22);
var pre = new Date(2019, 7, 23);
var ton = new Date(2019, 7, 26);
var post = new Date(2019, 7, 27);
// todays date
var currDate = new Date();
var mm = currDate.getMonth() + 1;
var dd = currDate.getDate();
var yyyy = currDate.getFullYear();
// Get the date parts
var ddtDay = ddt.getDate();
var ddtMonth = ddt.getMonth() + 1;
var ddtYear = ddt.getFullYear();
//console.log(ddtYear, ddtMonth, ddtDay);
var preDay = pre.getDate();
var preMonth = pre.getMonth() + 1;
var preYear = pre.getFullYear();
//console.log(preYear, preMonth, preDay);
var tonDay = ton.getDate();
var tonMonth = ton.getMonth() + 1;
var tonYear = ton.getFullYear();
//console.log(tonYear, tonMonth, tonDay);
var postDay = post.getDate();
var postMonth = post.getMonth() + 1;
var postYear = post.getFullYear();
//console.log(postYear, postMonth, postDay);
// format the date parts
if (ddtDay < 10) {
ddtDay = '0' + ddtDay;
}
if (ddtMonth < 10) {
ddtMonth = '0' + ddtMonth;
}
if (preDay < 10) {
preDay = '0' + preDay;
}
if (preMonth < 10) {
preMonth = '0' + preMonth;
}
if (tonDay < 10) {
tonDay = '0' + tonDay;
}
if (tonMonth < 10) {
tonMonth = '0' + tonMonth;
}
if (postDay < 10) {
postDay = '0' + postDay;
}
if (tonMonth < 10) {
postMonth = '0' + postMonth;
}
if (dd < 10) {
dd = '0' + dd;
}
if (mm < 10) {
mm = '0' + mm;
}
var ddtF = (ddtYear + '-' + ddtMonth + '-' + ddtDay);
var preF = (preYear + '-' + preMonth + '-' + preDay);
var tonF = (tonYear + '-' + tonMonth + '-' + tonDay);
var postF = (postYear + '-' + postMonth + '-' + postDay);
var today = (yyyy + '-' + mm + '-' + dd);
console.log(ddtF);
console.log(preF);
console.log(tonF);
console.log(postF);
console.log(today);
// logic
if (today >= postF) {
console.log('post');
} else if (today === tonF) {
console.log('ton');
} else if (today < tonF && today >= preF) {
console.log('pre');
} else if (today <= ddtF) {
console.log('ddt');
}

JS AM/PM times always show AM

I am making a simple time calculator in javascript. I have converted the times into 12-hour instead of 24 hour time for simplicity, however the code I have for calculating am/pm always shows am. Any reason why this would be happening?
Here is my code:
function solveTime(x) {
var suffixSolve = (utcHours + x) % 24;
var suffix = "am";
if (utcHours > 12) {
var suffix = "pm";
}
if (utcMinutes == 0) {
utcMinutesLead = "00";
}
if (utcMinutes < 10) {
utcMinutesLead = "0" + utcMinutes;
}
var timeSolve = (((utcHours + x) + 11) % 12 + 1);
var timeTotal = timeSolve + ":" + utcMinutesLead + " " + suffix;
var utcMod = x;
if (utcMod > 0) {
utcMod = "+" + utcMod;
}
document.getElementById(x).innerHTML = "(UTC" + utcMod + ") " + timeTotal;
}
and here is the code behind utcHours
var masterTimeUTC = new Date();
var utcHours = masterTimeUTC.getUTCHours();
var utcMinutes = masterTimeUTC.getUTCMinutes();
var utcSeconds = masterTimeUTC.getUTCSeconds();
var utcMinutesLead = masterTimeUTC.getUTCMinutes();
Example here: http://codepen.io/markgamb/pen/gwGkbo

The issue is you should be checking whether suffixSolve is greater than 12 instead of utcHours, because utcHours does not change due to the value of x. Since you can shift the hours forward and backwards, I created a variable shift to handle that.
function solveTime(x) {
if (x < 0) {
var shift = 24 + x;
} else {
var shift = x;
}
var suffixSolve = (utcHours + shift) % 24;
var suffix = "am";
if (suffixSolve > 12) {
suffix = "pm";
}
if (utcMinutes == 0) {
utcMinutesLead = "00";
}
if (utcMinutes < 10) {
utcMinutesLead = "0" + utcMinutes;
}
var timeSolve = (((utcHours + x) + 11) % 12 + 1);
var timeTotal = timeSolve + ":" + utcMinutesLead + " " + suffix;
var utcMod = x;
if (utcMod > 0) {
utcMod = "+" + utcMod;
}
document.getElementById(x).innerHTML = "(UTC" + utcMod + ") " + timeTotal;
}
var masterTimeUTC = new Date();
var utcHours = masterTimeUTC.getUTCHours();
var utcMinutes = masterTimeUTC.getUTCMinutes();
var utcSeconds = masterTimeUTC.getUTCSeconds();
var utcMinutesLead = masterTimeUTC.getUTCMinutes();
solveTime(4);
solveTime(0);
solveTime(-8);
<div id="4"></div>
<div id="-8"></div>
<div id="0"></div>

Last array element keeps returning false

I have a time/date converter. When the user enters "130" for example it returns "06/07/2016 01:30:00" when they enter "6 7 16" for example it returns "06/07/2016 00:00:00" but when the user enters "6 7 16 130" for example it returns "06/07/2016 false:00"
Here is my relevant code (can show more if need be):
function checkDateTime(val) {
var nowDate = new Date();
var month, day, year, time;
var ar;
if (eval(val)) {
var tval = val.value;
ar = tval.split(' ');
if (ar.length === 3) { // i.e. if it's supposed to be a date
ar[0] = month;
ar[1] = day;
ar[2] = year;
document.getElementById("FromDate").value = CheckDate(val) + ' ' + '00:00:00';
//checkDate(ar[0] + ' ' + ar[1] + ' ' + ar[2]);
}
//alert(LeftPadZero(ar[0]) + ' ' + LeftPadZero(ar[1]) + ' ' + LeftPadZero(ar[2]));
//alert(CheckDate(ar[0] + ' ' + ar[1] + ' ' + ar[2]));
if (ar.length === 1) { // if it's a time
ar[0] = time;
var MM = nowDate.getMonth() + 1;
var DD = nowDate.getDate();
var Y = nowDate.getFullYear();
var nowDateFormat = LeftPadZero(MM) + '/' + LeftPadZero(DD) + '/' + Y;
alert(ar[0]);
document.getElementById("FromDate").value = nowDateFormat + ' ' + checktime(val) + ':00';
}
if (ar.length === 4) { // if date and time
ar[0] = month;
// alert(ar[0]);
ar[1] = day;
// alert(ar[1]);
ar[2] = year;
// alert(ar[2]);
ar[3] = time;
// alert(ar[3]);
document.getElementById("FromDate").value = CheckDate(val) + ' ' + checktime(val) + ':00';
// alert(ar[0] + ' ' + ar[1] + ' ' + ar[2] + ' ' + ar[3]);
}
}
}
function CheckDate(theobj) {
var isInvalid = 0;
var themonth, theday, theyear;
var arr;
if (eval(theobj)) {
var thevalue = theobj.value;
arr = thevalue.split(" ");
if (arr.length < 2) {
arr = thevalue.split("/");
if (arr.length < 2) {
arr = thevalue.split("-");
if (arr.length < 2) {
isInvalid = 1;
}
}
}
if (isInvalid == 0) {
themonth = arr[0];
theday = arr[1];
if (arr.length == 3) {
theyear = arr[2];
} else {
theyear = new Date().getFullYear();
}
if (isNaN(themonth)) {
themonth = themonth.toUpperCase();
//month name abbreviation array
var montharr = ["JAN", "FEB", "MAR", "APR", "MAY", "JUN", "JUL", "AUG", "SEP", "OCT", "NOV", "DEC"];
for (i = 0; i < montharr.length; i++) {
//if the first 3 characters of month name matches
if (themonth.substring(0, 3) == montharr[i]) {
themonth = i + 1;
break;
}
}
} else {
if (themonth < 1 || themonth > 12) {
isInvalid = 1;
}
}
}
if (isNaN(themonth) || isNaN(theday) || isNaN(theyear)) {
isInvalid = 1;
}
if (isInvalid == 0) {
var thedate = LeftPadZero(themonth) + "/" + LeftPadZero(theday) + "/" + LeftPadZero(theyear);
return thedate;
} else {
return false;
}
}
}
function checktime(x) {
var tempchar = new String;
tempchar = MakeNum(x);
if (tempchar != '' && tempchar.length < 4) {
//e.g., if they enter '030' make it '0030'
if (tempchar.length == 3) {
tempchar='0' + tempchar;
}
//e.g, if they enter '11' make it '1100'
if (tempchar.length == 2) {
tempchar=tempchar + '00';
}
//e.g, if they enter '6' make it '0600'
if (tempchar.length == 1) {
tempchar='0' + tempchar + '00';
}
}
if (tempchar==null || tempchar == '') {
return false;
}
else {
if (tempchar=='2400') {
return false;
}else{
var tempnum= new Number(tempchar);
var swmin = new Number(tempnum % 100);
var swhour = new Number((tempnum-swmin)/100);
if (swhour < 25 && swmin < 60) {
x = LeftPadZero(swhour) + ":" + LeftPadZero(swmin);
return x;
}
else {
return false;
}
}
}
return false;
/*
if(eval(changecount)!=null){
changecount+=1;
}
*/
}
function MakeNum(x) {
var tstring = new String(x.value);
var tempchar = new String;
var f = 0;
for (var i = 0; i < tstring.length; i++) {
// walk through the string and remove all non-digits
chr = tstring.charAt(i);
if (isNaN(chr)) {
f=f;
}
else {
tempchar += chr;
f++;
}
}
return tempchar;
}
I have tried numerous things to figure out why the time element returns false in an array of length 4, but not an array length 1 for some reason, including setting various alerts and checking the console. I have googled this problem several times and came up empty.
To reiterate, my problem is that the time element returns false in an array of 4, and what I am trying to accomplish is for the user to input a date and time and have them both formatted and displayed correctly.
Can anybody help and/or offer any advice and/or suggestions? Thanks!
Edit: user enters '130' should convert to '06/07/2016(today's date) 01:30:00'
6 7 16 should convert to '06/07/2016 00:00:00'
6 7 16 130 should convert to '06/07/2016 01:30:00'

There seems to be some missing parts here... various functions and whatever input type these ones need are excluded from your post... However, taking a guess, I'm going to say that when you are making your final "checktime" call, rather than passing the full "val" variable, you should just be passing the last chunk of your split input, "ar[3]" in this case. That way, only that piece is evaluated by the function.
IE:
document.getElementById("FromDate").value = CheckDate(val) + ' ' + checktime(val) + ':00';
should be
document.getElementById("FromDate").value = CheckDate(val) + ' ' + checktime(ar[3]) + ':00';
Again, this is just a guess due to the missing pieces.
Edit:
After getting some additional details, the issue DOES seem to be in the data being sent to the checktime function, however, due to the current code setup, the fix is actually just making sure that the data being processed by the checktime function is only the last item in the array... see below for the correction within the checktime function:
tempchar = MakeNum(x);
becomes
tempchar = MakeNum(x).split(' ').pop();

Loop through an array using $.getJSON

I'm using a for loop to iterate on an array of dates. This array is passed into the JSON request. Problem is that each time it loops it's only pulling the first item in the array.. like it's ignoring i or its cached for some reason. I've tried two different approaches and both give me the same results. Any suggestions?
First approach
for (i = 0; i <= 7; i++) {
(function(i) {
$.getJSON(url + apiKey + "/" + position.coords.latitude + "," + position.coords.longitude + "," + aryDates[i] + "?callback=?", function(data) {
var listItem = document.createElement("li");
listItem.className = "js-day-temp";
$('.js-forecast').append(listItem);
$('.js-day-temp').html(Math.floor(data.daily.data[0].temperatureMin) + '°');
});
})(i);
}
Second approach
for (i = 0; i <= 7; i++) {
$.ajax({
url: url + apiKey + "/" + position.coords.latitude + "," + position.coords.longitude + "," + aryDates[i] + "?callback=?",
async: false,
dataType: 'json',
success: function(data) {
var listItem = document.createElement("li");
listItem.className = "js-day-temp";
$('.js-forecast').append(listItem);
$('.js-day-temp').html(Math.floor(data.daily.data[0].temperatureMin) + '°');
}
});
}
And this is how I pull dates
function GetDates(startDate, daysToAdd) {
var aryDates = [];
var currentDay = [];
for(var i = 0; i <= daysToAdd; i++) {
var currentDate = new Date();
currentDate.setUTCDate(startDate.getUTCDate() + i);
currentDay.push(DayAsString(currentDate.getUTCDay()));
// aryDates.push(DayAsString(currentDate.getDay()) + ", " +
currentDate.getDate() + " " + MonthAsString(currentDate.getMonth()) + " " + currentDate.getFullYear());
aryDates.push(currentDate.getUTCFullYear() + "-" + MonthAsString(currentDate.getUTCMonth()) + "-" + ("0" + (currentDate.getUTCDate()+1)).slice(-2) + "T12:00:00-0400");
}
return aryDates;
return currentDay;
}
function MonthAsString(monthIndex) {
var d=new Date();
var month=new Array();
month[0]="01";
month[1]="02";
month[2]="03";
month[3]="04";
month[4]="05";
month[5]="06";
month[6]="07";
month[7]="08";
month[8]="09";
month[9]="10";
month[10]="11";
month[11]="12";
return month[monthIndex];
}
function DayAsString(dayIndex) {
var weekdays = new Array(7);
weekdays[0] = "Sunday";
weekdays[1] = "Monday";
weekdays[2] = "Tuesday";
weekdays[3] = "Wednesday";
weekdays[4] = "Thursday";
weekdays[5] = "Friday";
weekdays[6] = "Saturday";
return weekdays[dayIndex];
}
var startDate = new Date();
var aryDates = GetDates(startDate, 7);

Figured it out! Here's what I changed:
$('.js-forecast').append('<li class="js-day-temp ' + 'day-selector' + i + '">' + aryDates[i] + '</li>');
$('.js-day-temp.day-selector' + i).html(Math.floor(data.currently.temperature) + '°');

Javascript date format for a date

How do I format a date in Javascript to something e.g. 'yyyy-MM-dd HH:mm:ss z'?
This date.toString('yyyy-MM-dd HH:mm:ss z'); never work out for me :/
Any idea?
======
I solved my own which I rewrote like this:
var parseDate = function(date) {
var m = /^(\d{4})-(\d\d)-(\d\d) (\d\d):(\d\d):(\d\d) UTC$/.exec(date);
var tzOffset = new Date(+m[1], +m[2] - 1, +m[3], +m[4], +m[5], +m[6]).getTimezoneOffset();
return new Date(+m[1], +m[2] - 1, +m[3], +m[4], +m[5] - tzOffset, +m[6]);
}
var formatDateTime = function(data) {
var utcDate = parseDate(data);
var theMonth = utcDate.getMonth() + 1;
var myMonth = ((theMonth < 10) ? "0" : "") + theMonth.toString();
var theDate = utcDate.getDate();
var myDate = ((theDate < 10) ? "0" : "") + theDate.toString();
var theHour = utcDate.getHours();
var myHour = ((theHour < 10) ? "0" : "") + theHour.toString();
var theMinute = utcDate.getMinutes();
var myMinute = ((theMinute < 10) ? "0" : "") + theMinute.toString();
var theSecond = utcDate.getSeconds();
mySecond = ((theSecond < 10) ? "0" : "") + theSecond.toString();
var theTimezone = new Date().toString();
var myTimezone = theTimezone.indexOf('(') > -1 ?
theTimezone.match(/\([^\)]+\)/)[0].match(/[A-Z]/g).join('') :
theTimezone.match(/[A-Z]{3,4}/)[0];
if (myTimezone == "GMT" && /(GMT\W*\d{4})/.test(theTimezone)) {
myTimezone = RegExp.$1;
}
if (myTimezone == "UTC" && /(UTC\W*\d{4})/.test(theTimezone)) {
myTimezone = RegExp.$1;
}
var dateString = utcDate.getFullYear() + "-" +
myMonth + "-" +
myDate + " " +
myHour + ":" +
myMinute + ":" +
mySecond + " " +
myTimezone;
return dateString;
}
and I get: 2012-11-15 22:08:08 MPST :) PERFECT!

function formatDate(dateObject) //pass date object
{
return (dateObject.getFullYear() + "-" + (dateObject.getMonth() + 1)) + "-" + dateObject.getDate() ;
}

Use this lib to make your life much easier:
var formattedDate = new Date().format('yyyy-MM-dd h:mm:ss');
document.getElementById("time").innerHTML= formattedDate;
DEMO

Basically, we have three methods and you have to combine the strings for yourself:
getDate(): Returns the date
getMonth(): Returns the month
getFullYear(): Returns the year
Example:
var d = new Date();
var curr_date = d.getDate();
var curr_month = d.getMonth() + 1; //Months are zero based
var curr_year = d.getFullYear();
document.write(curr_date + "-" + curr_month + "-" + curr_year); </script>
for more details look at 10 steps to format date and time and also check this