Ignore props without a restyle function in buildStyle

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 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

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];

src/test/createText.test.tsx

@@ -96,6 +96,47 @@ 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('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}>

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(