HTML5 Date Validation

Question

I\'m looking to implement validation for a mobile site, where I have two input fields and I would like the first to validate the value is no later than todays date, and the

Answer 1

I like moment.js. It makes it easier to deal with dates and times.

First, let's make sure a day "is before tomorrow". This will depend a bit upon what the definition of tomorrow is.

var m = moment("26/11/2013", "MM/DD/YYYY");
// tomorrow this time
var t = moment().add("days", 1);
// tomorrow start of day
var tomorrow = moment([t.year(), t.month(), t.date()]);
if (m.lessThan(tomorrow)) {
   // today!!! (or before)
}

Similarly, the same approach can be used for a year from now. It's likely fine enough to not care about the time component in this case, and I've slogged on another day - but if it matters (e.g. looking for the start of the day), see the previous example.

var m = moment("26/11/2013", "MM/DD/YYYY");
var aYearFromNow = moment().add("years", 1).add("days", 1);
if (m.lessThan(aYearFromNow)) {
   // still less than a year!
}