1 files changed, 43 insertions, 0 deletions
diff --git a/library/moment/src/lib/moment/compare.js b/library/moment/src/lib/moment/compare.js
new file mode 100644
index 000000000..b6634737a
--- /dev/null
+++ b/library/moment/src/lib/moment/compare.js
@@ -0,0 +1,43 @@
+import { isMoment } from './constructor';
+import { normalizeUnits } from '../units/aliases';
+import { createLocal } from '../create/local';
+
+export function isAfter (input, units) {
+    var inputMs;
+    units = normalizeUnits(typeof units !== 'undefined' ? units : 'millisecond');
+    if (units === 'millisecond') {
+        input = isMoment(input) ? input : createLocal(input);
+        return +this > +input;
+    } else {
+        inputMs = isMoment(input) ? +input : +createLocal(input);
+        return inputMs < +this.clone().startOf(units);
+    }
+}
+
+export function isBefore (input, units) {
+    var inputMs;
+    units = normalizeUnits(typeof units !== 'undefined' ? units : 'millisecond');
+    if (units === 'millisecond') {
+        input = isMoment(input) ? input : createLocal(input);
+        return +this < +input;
+    } else {
+        inputMs = isMoment(input) ? +input : +createLocal(input);
+        return +this.clone().endOf(units) < inputMs;
+    }
+}
+
+export function isBetween (from, to, units) {
+    return this.isAfter(from, units) && this.isBefore(to, units);
+}
+
+export function isSame (input, units) {
+    var inputMs;
+    units = normalizeUnits(units || 'millisecond');
+    if (units === 'millisecond') {
+        input = isMoment(input) ? input : createLocal(input);
+        return +this === +input;
+    } else {
+        inputMs = +createLocal(input);
+        return +(this.clone().startOf(units)) <= inputMs && inputMs <= +(this.clone().endOf(units));
+    }
+}