This question already has answers here:
Why does jQuery or a DOM method such as getElementById not find the element?
(6 answers)
Closed 1 year ago.
I have some code which generates a dynamic date string, I want to put in into a web link so I can call the link to generate a new image each day.
I have written this code:
<script>
var d = new Date();
var year = d.getFullYear();
var month = d.getMonth() + 1;
var day = d.getDate();
document.getElementById("link").href = "http://earth.nullschool.net/#" + year + "/" + month + "/" + day + "/1200Z/wind/isobaric/500hPa/";
</script>
500 mb Earth Wind Map
However when I click this link it goes to the old date (2012), not the current date that the javascript creates. How do I create the link with today's date inside it?
You need to place the anchor tag before the script.
500 mb Earth Wind Map
<script>
var d = new Date();
var year = d.getFullYear();
var month = d.getMonth() + 1;
var day = d.getDate();
document.getElementById("link").href = "http://earth.nullschool.net/#" + year + "/" + month + "/" + day + "/1200Z/wind/isobaric/500hPa/";
</script>
I am not sure if this works but it should so for your last line you can do this instead
<a href="http://earth.nullschool.net/#{}/{}/{}/1200Z/wind/isobaric/500hPa/".format(year,month,day) id="link">500 mb Earth
Since you are using a format method u are substituting your variable into the brackets.
Related
This question already has answers here:
How to add days to Date?
(56 answers)
Closed 5 years ago.
I am using this code on the page to show when the next few dates are, they are always the next few days... but it is not working now:
<script>var now = new Date();
var day = ("0" + (now.getDate()+3)).slice(-2);
var day2 = ("0" + (now.getDate()+4)).slice(-2);
var month = ("0" + (now.getMonth() + 1)).slice(-2);
var today = (month)+"/"+(day)+"/"+now.getFullYear();
var today2 = (month)+"/"+(day2)+"/"+now.getFullYear();
document.write(today); document.write(' and/or ');document.write(today2);
</script>
But it is putting this out:
currently scheduled for: 05/32/2017 and/or 05/33/2017
how do I get the + 1 to have it go to the next month if it needs to?
Try this
<script>
var now = new Date();
var day = ("0" + (now.setDate(now.getDate()+3)).getDate()).slice(-2);
var day2 = ("0" + (now.setDate(now.getDate()+4)).getDate()).slice(-2);
var month = ("0" + (now.setMonth(now.getMonth() + 1+1)).getMonth()).slice(-2);
var today = (month)+"/"+(day)+"/"+now.getFullYear();
var today2 = (month)+"/"+(day2)+"/"+now.getFullYear();
document.write(today); document.write(' and/or ');document.write(today2);
</script>
This is my javascript code:
function borrowbook ()
{
var today = new Date();
var day = today.getDate();
var month = today.getMonth()+1;
var year = today.getFullYear();
var input_day = document.getElementById("textbox").value;
var newday = today.setDate(day + input_day);
var fulltime1 = newday + "-" + month + "-" + year;
alert ("Return Date is: " + fulltime1);
}
And the result was not my expected result:
Actually what I want to do is if a user enters a value in 'Days allowed',I want to display the book return date.But I do not know why does the day of the month cannot show up properly.Any suggestion to solve this problem?
When you do:
var newday = today.setDate(day + input_day);
you are setting the value of newday to the return value of today.setDate(...), which is a time clip.
Since *input_day* is the value of a form control, and such values are always strings, the + operator will concatenate the values, not add them.
What you probably want is the date, so:
today.setDate(day + +input_day); // set the new date, converting input_date to Number
var newday = today.getDate(); // get the new date
Also, you should get the month and year after adding the day as it may change their values:
31 May + 1 day -> 1 June
There are three things you need to change.
Here is a working jsfiddle.
http://jsfiddle.net/bbankes/VMn3x/
First, the month and the year may also be incorrect. If today were 31-Dec 2014, your code would not show 10-Jan 2014, but instead 10-Dec 2013. You can rectify this by getting the day month and the year from the renew date instead of today's date.
Second, input_day is a string, so you need to parse it as an integer using the built-in javascript function parseInt();
Third, the setDate() method on a Date object does not return the new date. This is the problem that RobG shows.
The new function is as follows:
function borrowbook() {
var today = new Date();
var day = today.getDate();
var input_day = document.getElementById("textbox").value;
var returnDate = new Date();
returnDate.setDate(day + parseInt(input_day));
var returnDay = returnDate.getDate();
var returnMonth = returnDate.getMonth() + 1;
var returnYear = returnDate.getFullYear();
var fulltime1 = returnDay + "-" + returnMonth + "-" + returnYear;
alert ("Return Date is: " + fulltime1);
}
This question already has answers here:
How to add number of days to today's date? [duplicate]
(16 answers)
Closed 8 years ago.
i have the date 2013-12-28 and i want add one or more more day to it. so if i add one more day it will be 2013-12-29.
i try to add it by adding the value of it's date (date 28+1), it works, but what if i add 7 more day to it? the date will be 35, and of course it is not a valid date format.
can someone help me?
here's the example of my script:
var d = new Date();
var Y = d.getFullYear();
var M = d.getMonth()+1;
var D = d.getDate();
var DT = d.getDate()+1;// what if i + 20 days from today? the format would be invalid
var today = Y+"-"+M+"-"+D;
var tomorrow = Y+"-"+M+"-"+DT;
alert(today+" <> "+tomorrow);
// "<>" means nothing
You may try like this using getdate(), setdate() and getdate():
var myDate = new Date();
myDate.setDate(myDate.getDate() + 7);
If you already have a date object as in the code you show:
var d = new Date();
...then you can add 7 days to it like this:
d.setDate( d.getDate() + 7 );
...and it will automatically increment the month if needed.
Further reading:
The Date object
.getDate() method
.setDate() method
If you need to extract the year, month and day in order to format the result a particular way do so after adding days.
The solution is to convert your date string into unix timestamp, and them add 3600 * 24 * <number of days> to the timestamp and them convert it back to date string.
The code can be as follows:
function addDaysToDate(date, days) {
var time = Date.parse(date) + days * 24 * 3600;
date = new Date(time);
return date.getFullYear() + '-' + date.getMonth() + '-' + date.getDate();
}
var date = '2013-12-28';
console.log(addDaysToDate(date, 7));
I'm using a script to display the current date to someone, but I want to do two things to it.
First, I want to change the format to MM/DD/YY, so it's only showing the year in 2 digits.
Then second, how can I add a default? So if it's not able to be pulled by someone, it will show "Today" instead of a date?
Here's the script if anyone could help:
var currentTime = new Date()
var month = currentTime.getMonth() + 1
var day = currentTime.getDate()
var year = currentTime.getFullYear()
document.write(month + "/" + day + "/" + year)
Working FIDDLE Demo
Add a div to your HTML and put your default text inside it:
<div id="date">Today</div>
Then with javascript, change it, and if the user don't have javascript, it remains not changed:
// create date
var currentTime = new Date();
var month = currentTime.getMonth() + 1;
var day = currentTime.getDate();
var year = currentTime.getFullYear();
var date = month + "/" + day + "/" + (year + '').substring(2);
// now insert it
document.getElementById('date').innerHTML = date;
[!] Don't forget to add the JS after your element or add it to document ready.
I don't see any reason for this to fail, If javascript is enabled in the client it should work, still if you want error handling
try {
var currentTime = new Date()
var month = currentTime.getMonth() + 1
var day = currentTime.getDate()
var year = currentTime.getFullYear()
document.write(month + "/" + day + "/" + (year + '').substring(2))
}catch(e){
document.write('Today');
}
You can get the last two digits of day by doing String(year).substring(2,4). So you end up with:
console.log(day+"/"+month+"/"+String(year).substring(2,4));
To set defaults you can use the following:
var demo = value1 || default
You can play around with these ideas here
I have this code:
var fd=1+self.theDate.getMonth() +'/'+ today+'/'+self.theDate.getFullYear();
It works, but it's format is Month, Day, Year.
I need to change it to: Day, Month Year.
So, I tried this:
var fd=1+today +'/'+ self.theDate.getMonth()+'/'+self.theDate.getFullYear();
Now, my change does not work. Is it that I have not done it properly or is my change right?
Thanks
I expect the correct answer is this:
var fd=today +'/'+ (self.theDate.getMonth() + 1) +'/'+self.theDate.getFullYear();
This leaves today alone, and groups Month so that it does a proper number addition instead of string concatenation.
var theDate = new Date();
var today = theDate.getDate();
var month = theDate.getMonth()+1; // js months are 0 based
var year = theDate.getFullYear();
var fd=today +'/'+ month +'/'+year
or perhaps you prefer 22/05/2011
var theDate = new Date();
var today = theDate.getDate();
if (today<10) today="0"+today;
var month = theDate.getMonth()+1; // js months are 0 based
if (month < 10) month = "0"+month;
var year = theDate.getFullYear();
var fd=""+today +"/"+ month +"/"+year
You are no longer adding 1 to the month, you are adding it to today. Make sure to parenthesize this since "x" + 1 + 2 => "x12" but "x" + (1 + 2) => "x3"