From cf05a412d564eb8919f775d56a44ed0afd692908 Mon Sep 17 00:00:00 2001
From: Christopher Pruijsen <christopher.pruijsen@gmail.com>
Date: Fri, 9 Oct 2026 22:14:04 +0100
Subject: [PATCH 1/2] Ignore props without a restyle function in buildStyle

---
 CHANGELOG.md                   |  1 +
 src/composeRestyleFunctions.ts |  4 +++-
 src/test/createText.test.tsx   | 27 +++++++++++++++++++++++++++
 src/test/createVariant.test.ts | 22 ++++++++++++++++++++++
 4 files changed, 53 insertions(+), 1 deletion(-)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index 04e0341f..3c2b6c5e 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -7,6 +7,7 @@ and adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.html).
 
 ## Next
 
+- Fixed: Crash with `funcsMap[propKey] is not a function` when a variant contains style props that are not Restyle props.
 - Chore: Use npm trusted publishing and isolate package builds from publishing permissions.
 
 ## 2.4.5 - 2025-03-19
diff --git a/src/composeRestyleFunctions.ts b/src/composeRestyleFunctions.ts
index a598c259..f40f6a7b 100644
--- a/src/composeRestyleFunctions.ts
+++ b/src/composeRestyleFunctions.ts
@@ -54,7 +54,9 @@ const composeRestyleFunctions = <
     // We make the assumption that the props object won't have extra prototype keys.
     // eslint-disable-next-line guard-for-in
     for (const key in props) {
-      const mappedProps = funcsMap[key](props, options);
+      const func = funcsMap[key];
+      if (func === undefined) continue;
+      const mappedProps = func(props, options);
       // eslint-disable-next-line guard-for-in
       for (const mappedKey in mappedProps) {
         styles[mappedKey as keyof ViewStyle] = mappedProps[mappedKey];
diff --git a/src/test/createText.test.tsx b/src/test/createText.test.tsx
index 364834c9..e7a904fc 100644
--- a/src/test/createText.test.tsx
+++ b/src/test/createText.test.tsx
@@ -96,6 +96,33 @@ describe('createText', () => {
     ]);
   });
 
+  it('ignores textVariant values that are not restyle props', () => {
+    const themeWithNonRestyleProp = createTheme({
+      ...theme,
+      textVariants: {
+        ...theme.textVariants,
+        title: {
+          ...theme.textVariants.title,
+          transform: [{rotate: '45deg'}],
+        },
+      },
+    });
+
+    const {root} = render(
+      <ThemeProvider theme={themeWithNonRestyleProp}>
+        <Text variant="title">Some text</Text>
+      </ThemeProvider>,
+    );
+
+    expect(root.findByType(RNText).props.style).toStrictEqual([
+      {
+        color: palette.black,
+        fontSize: 48,
+        fontWeight: 'bold',
+      },
+    ]);
+  });
+
   it('passes all React Native Text Style Props', () => {
     const {root} = render(
       <ThemeProvider theme={theme}>
diff --git a/src/test/createVariant.test.ts b/src/test/createVariant.test.ts
index 9dc1803c..9ddf2e2f 100644
--- a/src/test/createVariant.test.ts
+++ b/src/test/createVariant.test.ts
@@ -175,6 +175,28 @@ describe('createVariant', () => {
     expect(variant.func({}, {theme, dimensions})).toStrictEqual({});
   });
 
+  it('ignores variant values that are not restyle props', () => {
+    const themeWithNonRestyleProp = {
+      ...theme,
+      textVariants: {
+        ...theme.textVariants,
+        rotated: {
+          fontSize: 14,
+          transform: [{rotate: '45deg'}],
+        },
+      },
+    };
+    const variant = createVariant({themeKey: 'textVariants'});
+    expect(
+      variant.func(
+        {variant: 'rotated'},
+        {theme: themeWithNonRestyleProp, dimensions},
+      ),
+    ).toStrictEqual({
+      fontSize: 14,
+    });
+  });
+
   it('supports referencing other theme values in the variant', () => {
     const variant = createVariant({themeKey: 'textVariants'});
     expect(

From 071edbc80f19af4caad8fa38c3f4b71be1c9deed Mon Sep 17 00:00:00 2001
From: Christopher Pruijsen <christopher.pruijsen@gmail.com>
Date: Fri, 9 Oct 2026 22:16:53 +0100
Subject: [PATCH 2/2] Test createText with a theme that has no textVariants

---
 CHANGELOG.md                 |  2 +-
 src/test/createText.test.tsx | 14 ++++++++++++++
 2 files changed, 15 insertions(+), 1 deletion(-)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index 3c2b6c5e..f499a38d 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -7,7 +7,7 @@ and adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.html).
 
 ## Next
 
-- Fixed: Crash with `funcsMap[propKey] is not a function` when a variant contains style props that are not Restyle props.
+- Fixed: Crash with `funcsMap[propKey] is not a function` when the theme has no `textVariants` or a variant contains props that are not Restyle props.
 - Chore: Use npm trusted publishing and isolate package builds from publishing permissions.
 
 ## 2.4.5 - 2025-03-19
diff --git a/src/test/createText.test.tsx b/src/test/createText.test.tsx
index e7a904fc..eba3f7cd 100644
--- a/src/test/createText.test.tsx
+++ b/src/test/createText.test.tsx
@@ -123,6 +123,20 @@ describe('createText', () => {
     ]);
   });
 
+  it('renders when the theme has no textVariants', () => {
+    const {textVariants, ...themeWithoutTextVariants} = theme;
+
+    const {root} = render(
+      <ThemeProvider theme={themeWithoutTextVariants}>
+        <Text color="black">Some text</Text>
+      </ThemeProvider>,
+    );
+
+    expect(root.findByType(RNText).props.style).toStrictEqual([
+      {color: palette.black},
+    ]);
+  });
+
   it('passes all React Native Text Style Props', () => {
     const {root} = render(
       <ThemeProvider theme={theme}>