From 472a636d25913284492070ffd83ca4b435b036c2 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Thibaut=20Mar=C3=A9chal?= <t.marechal@evs.com>
Date: Tue, 7 Jul 2026 12:07:58 +0200
Subject: [PATCH 1/2] fix: setState called after unmount in validateForm
 function.

---
 src/Formsy.ts | 12 +++++++++++-
 1 file changed, 11 insertions(+), 1 deletion(-)

diff --git a/src/Formsy.ts b/src/Formsy.ts
index 75e8e13d..a10c41e2 100644
--- a/src/Formsy.ts
+++ b/src/Formsy.ts
@@ -67,6 +67,7 @@ export class Formsy extends React.Component<PropsWithChildren<FormsyProps>, Form
   public emptyArray: any[];
   public prevInputNames: any[] | null = null;
   private readonly debouncedValidateForm: () => void;
+  private mounted: boolean = false;
 
   public constructor(props: FormsyProps) {
     super(props);
@@ -85,14 +86,23 @@ export class Formsy extends React.Component<PropsWithChildren<FormsyProps>, Form
     };
     this.inputs = [];
     this.emptyArray = [];
-    this.debouncedValidateForm = debounce(this.validateForm, ONE_RENDER_FRAME);
+    this.debouncedValidateForm = debounce(() => {
+      if (this.mounted) {
+        this.validateForm();
+      }
+    }, ONE_RENDER_FRAME);
   }
 
   public componentDidMount = () => {
+    this.mounted = true;
     this.prevInputNames = this.inputs.map((component) => component.props.name);
     this.validateForm();
   };
 
+  public componentWillUnmount = () => {
+    this.mounted = false;
+  }
+
   public componentDidUpdate = (prevProps: FormsyProps) => {
     const { validationErrors, disabled = false } = this.props;
 

From 7bb5a77185b622bad65e44fea1a51a75b0324ea6 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Thibaut=20Mar=C3=A9chal?= <t.marechal@evs.com>
Date: Tue, 7 Jul 2026 12:08:41 +0200
Subject: [PATCH 2/2] fix: setState called after unmount in validateForm
 function.

---
 src/Formsy.ts | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/Formsy.ts b/src/Formsy.ts
index a10c41e2..eb50546b 100644
--- a/src/Formsy.ts
+++ b/src/Formsy.ts
@@ -101,7 +101,7 @@ export class Formsy extends React.Component<PropsWithChildren<FormsyProps>, Form
 
   public componentWillUnmount = () => {
     this.mounted = false;
-  }
+  };
 
   public componentDidUpdate = (prevProps: FormsyProps) => {
     const { validationErrors, disabled = false } = this.props;