From e3c01aee2ee757ecb492f4a8ef2cc24be88ebf7b Mon Sep 17 00:00:00 2001
From: LoliPix <lolipix@shiniei.top>
Date: Tue, 11 Aug 2026 21:08:18 +0800
Subject: [PATCH] Return this in setWaterAmount method

Add return statement to setWaterAmount method.
---
 .../04-private-protected-properties-methods/article.md           | 1 +
 1 file changed, 1 insertion(+)

diff --git a/1-js/09-classes/04-private-protected-properties-methods/article.md b/1-js/09-classes/04-private-protected-properties-methods/article.md
index 4396358d5..90ec94dee 100644
--- a/1-js/09-classes/04-private-protected-properties-methods/article.md
+++ b/1-js/09-classes/04-private-protected-properties-methods/article.md
@@ -163,6 +163,7 @@ class CoffeeMachine {
   *!*setWaterAmount(value)*/!* {
     if (value < 0) value = 0;
     this._waterAmount = value;
+    return this;
   }
 
   *!*getWaterAmount()*/!* {