1 files changed, 28 insertions, 0 deletions
diff --git a/library/moment/src/lib/create/check-overflow.js b/library/moment/src/lib/create/check-overflow.js
new file mode 100644
index 000000000..88a62ae54
--- /dev/null
+++ b/library/moment/src/lib/create/check-overflow.js
@@ -0,0 +1,28 @@
+import { daysInMonth } from '../units/month';
+import { YEAR, MONTH, DATE, HOUR, MINUTE, SECOND, MILLISECOND } from '../units/constants';
+import getParsingFlags from '../create/parsing-flags';
+
+export default function checkOverflow (m) {
+    var overflow;
+    var a = m._a;
+
+    if (a && getParsingFlags(m).overflow === -2) {
+        overflow =
+            a[MONTH]       < 0 || a[MONTH]       > 11  ? MONTH :
+            a[DATE]        < 1 || a[DATE]        > daysInMonth(a[YEAR], a[MONTH]) ? DATE :
+            a[HOUR]        < 0 || a[HOUR]        > 24 || (a[HOUR] === 24 && (a[MINUTE] !== 0 || a[SECOND] !== 0 || a[MILLISECOND] !== 0)) ? HOUR :
+            a[MINUTE]      < 0 || a[MINUTE]      > 59  ? MINUTE :
+            a[SECOND]      < 0 || a[SECOND]      > 59  ? SECOND :
+            a[MILLISECOND] < 0 || a[MILLISECOND] > 999 ? MILLISECOND :
+            -1;
+
+        if (getParsingFlags(m)._overflowDayOfYear && (overflow < YEAR || overflow > DATE)) {
+            overflow = DATE;
+        }
+
+        getParsingFlags(m).overflow = overflow;
+    }
+
+    return m;
+}
+