import { hooks } from '../utils/hooks';
import hasOwnProp from '../utils/has-own-prop';
import isUndefined from '../utils/is-undefined';
import getParsingFlags from '../create/parsing-flags';
// Plugins that add properties should also add the key here (null value),
// so we can properly clone ourselves.
var momentProperties = hooks.momentProperties = [];
export function copyConfig(to, from) {
var i, prop, val;
if (!isUndefined(from._isAMomentObject)) {
to._isAMomentObject = from._isAMomentObject;
}
if (!isUndefined(from._i)) {
to._i = from._i;
}
if (!isUndefined(from._f)) {
to._f = from._f;
}
if (!isUndefined(from._l)) {
to._l = from._l;
}
if (!isUndefined(from._strict)) {
to._strict = from._strict;
}
if (!isUndefined(from._tzm)) {
to._tzm = from._tzm;
}
if (!isUndefined(from._isUTC)) {
to._isUTC = from._isUTC;
}
if (!isUndefined(from._offset)) {
to._offset = from._offset;
}
if (!isUndefined(from._pf)) {
to._pf = getParsingFlags(from);
}
if (!isUndefined(from._locale)) {
to._locale = from._locale;
}
if (momentProperties.length > 0) {
for (i = 0; i < momentProperties.length; i++) {
prop = momentProperties[i];
val = from[prop];
if (!isUndefined(val)) {
to[prop] = val;
}
}
}
return to;
}
var updateInProgress = false;
// Moment prototype object
export function Moment(config) {
copyConfig(this, config);
this._d = new Date(config._d != null ? config._d.getTime() : NaN);
if (!this.isValid()) {
this._d = new Date(NaN);
}
// Prevent infinite loop in case updateOffset creates new moment
// objects.
if (updateInProgress === false) {
updateInProgress = true;
hooks.updateOffset(this);
updateInProgress = false;
}
}
export function isMoment (obj) {
return obj instanceof Moment || (obj != null && obj._isAMomentObject != null);
}
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