From 51e8661144a285c995f95babca80e6814f5b18e4 Mon Sep 17 00:00:00 2001
From: Dmitrii Maganov <vonagam@gmail.com>
Date: Sun, 10 Feb 2019 15:47:00 +0300
Subject: [PATCH] feat: aliases `optional()` and `unknown()` (#460)

---
 src/mixed.js  | 1 +
 src/object.js | 4 ++++
 2 files changed, 5 insertions(+)

diff --git a/src/mixed.js b/src/mixed.js
index 27f781cc9..921c215ba 100644
--- a/src/mixed.js
+++ b/src/mixed.js
@@ -512,3 +512,4 @@ for (const method of ['validate', 'validateSync'])
 
 for (const alias of ['equals', 'is']) proto[alias] = proto.oneOf;
 for (const alias of ['not', 'nope']) proto[alias] = proto.notOneOf;
+proto.optional = proto.notRequired;
diff --git a/src/object.js b/src/object.js
index 417e83b5a..fdd51102e 100644
--- a/src/object.js
+++ b/src/object.js
@@ -245,6 +245,10 @@ inherits(ObjectSchema, MixedSchema, {
     return next;
   },
 
+  unknown(allow = true, message = locale.noUnknown) {
+    return this.noUnknown(!allow, message);
+  },
+
   transformKeys(fn) {
     return this.transform(obj => obj && mapKeys(obj, (_, key) => fn(key)));
   },