Edit fiddle - JSFiddle - React, Tailwind, and code Playground

JSFiddle - React, Tailwind, and code Playground

HTML

<script src="//cdnjs.cloudflare.com/ajax/libs/moment.js/2.4.0/moment.js"></script>

JavaScript

var formats = ['MM-DD-YYYY', 'MM/DD/YYYY']

    alert(moment('11/28/1981', formats).isValid())  // true
    alert(moment('2-29-2003', formats).isValid())   // false (not leap year)
    alert(moment('2-29-2004', formats).isValid())   // true

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JSFiddle - React, Tailwind, and code Playground

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