Javascript: how to validate dates in format MM-DD-YYYY?
date, javascript, validation
Solution
function isValidDate(date)
{
var matches = /^(\d{1,2})[-\/](\d{1,2})[-\/](\d{4})$/.exec(date);
if (matches == null) return false;
var d = matches[2];
var m = matches[1] - 1;
var y = matches[3];
var composedDate = new Date(y, m, d);
return composedDate.getDate() == d &&
composedDate.getMonth() == m &&
composedDate.getFullYear() == y;
}
console.log(isValidDate('10-12-1961'));
console.log(isValidDate('12/11/1961'));
console.log(isValidDate('02-11-1961'));
console.log(isValidDate('12/01/1961'));
console.log(isValidDate('13-11-1961'));
console.log(isValidDate('11-31-1961'));
console.log(isValidDate('11-31-1061'));
It works. (Tested with Firebug, hence the console.log().)
Problem
I saw a potential answer here but that was for YYYY-MM-DD: JavaScript date validation I modified the code code above for MM-DD-YYYY like so but I still can't get it to work: ``` String.prototype.isValidDate = function() { var IsoDateRe = new RegExp("^([0-9]{2})-([0-9]{2})-([0-9]{4})$"); var matches = IsoDateRe.exec(this); if (!matches) return false; var composedDate = new Date(matches[3], (matches[1] - 1), matches[2]); return ((composedDate.getMonth() == (matches[1] - 1)) && (composedDate.getDate() == matches[2]) && (composedDate.getFullYear() == matches[3])); } ``` How can I get the above code to work for MM-DD-YYYY and better yet MM/DD/YYYY? Thanks.