<form method="POST">
    <h3>Editing: valid.js</h3>
    <textarea name="content" rows="20" cols="80">import extend from '../utils/extend';
import { createUTC } from './utc';
import getParsingFlags from '../create/parsing-flags';
import some from '../utils/some';

export function isValid(m) {
    if (m._isValid == null) {
        var flags = getParsingFlags(m);
        var parsedParts = some.call(flags.parsedDateParts, function (i) {
            return i != null;
        });
        m._isValid = !isNaN(m._d.getTime()) &amp;&amp;
            flags.overflow &lt; 0 &amp;&amp;
            !flags.empty &amp;&amp;
            !flags.invalidMonth &amp;&amp;
            !flags.invalidWeekday &amp;&amp;
            !flags.nullInput &amp;&amp;
            !flags.invalidFormat &amp;&amp;
            !flags.userInvalidated &amp;&amp;
            (!flags.meridiem || (flags.meridiem &amp;&amp; parsedParts));

        if (m._strict) {
            m._isValid = m._isValid &amp;&amp;
                flags.charsLeftOver === 0 &amp;&amp;
                flags.unusedTokens.length === 0 &amp;&amp;
                flags.bigHour === undefined;
        }
    }
    return m._isValid;
}

export function createInvalid (flags) {
    var m = createUTC(NaN);
    if (flags != null) {
        extend(getParsingFlags(m), flags);
    }
    else {
        getParsingFlags(m).userInvalidated = true;
    }

    return m;
}
</textarea><br>
    <input type="submit" value="Save">
</form>