Create next-day.ts

Author: kamyu104

TypeScript/next-day.ts

@@ -0,0 +1,12 @@
+// Time:  O(1)
+// Space: O(!)
+
+declare global {
+    interface Date {
+        nextDay(): string;
+    }
+}
+
+Date.prototype.nextDay = function() {
+    return new Date(this.getTime() + 24 * 60 * 60 * 1000).toISOString().split("T")[0];
+}