Javascript: add 1 day to date

Question

Using the following code to add an extra day to a Date, however, it returns the value in numbers.

expiryDate = oldDate.setDate(olDate.getDate() + 1);
document.write(expiryDate);

Returns 1396393199000

Then, i tried formatting

expiryDate = oldDate.setDate(olDate.getDate() + 1);
document.write(format(expiryDate, "%2D/%2M/%2Y"));

And I get the following error;

Error while evaluating document Date '1396393199000': invalid character at position 5 ('3') JavaScript: error while evaluating script 'content htmlContent'.

Any advice?

Try passing oldDate to format() instead of expiryDate. The setDate() method will mutate the original object. — cookie monster
– cookie monster, Commented Mar 26, 2014 at 17:20
developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/… — Matt Burland
– Matt Burland, Commented Mar 26, 2014 at 17:22

Guilherme Lopes · Accepted Answer · 2014-03-26 17:32:27Z

1

Your expiryDate isnt valid, when you create dates you need to create a new Date();

Like:

var oldDate = new Date();
var expiryDate = new Date(oldDate.setDate(oldDate.getDate() + 1));

then you can run...

var oldDate = new Date();
var expiryDate = new Date(oldDate.setDate(oldDate.getDate() + 1));
document.write(expiryDate.getDate() + '/' + (expiryDate.getMonth() +1) + '/' + expiryDate. getFullYear());

Or you can use your format function from whatever library you are using...

answered Mar 26, 2014 at 17:32

Guilherme Lopes

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