Javascript:如何验证 MM-DD-YYYY 格式的日期? [英] Javascript: how to validate dates in format MM-DD-YYYY?

问题描述

我在这里看到了一个可能的答案，但那是针对 YYYY-MM-DD:JavaScript 日期验证

I saw a potential answer here but that was for YYYY-MM-DD: JavaScript date validation

我像这样修改了上面的 MM-DD-YYYY 代码代码，但我仍然无法让它工作:

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]));
}

如何使上述代码适用于 MM-DD-YYYY 和更好的 MM/DD/YYYY?

How can I get the above code to work for MM-DD-YYYY and better yet MM/DD/YYYY?

谢谢.

推荐答案

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'));

它有效.(用 Firebug 测试，因此是 console.log().)

It works. (Tested with Firebug, hence the console.log().)

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