@chakra-ui/react

ChakraProvider: ({
    children,
    theme,
    toastOptions,
    ...restProps
}: ChakraProviderProps) => JSX.Element;

extendTheme: (...extensions: any[]) => Dict;

mergeThemeOverride: (...overrides: any[]) => any;

withDefaultColorScheme: ({
    colorScheme,
    components,
}: {
    colorScheme: ThemingProps;
    components?: string[] | Dict;
}) => ThemeExtension;

withDefaultProps: ({
    defaultProps: { colorScheme, variant, size },
    components,
}: {
    defaultProps: ComponentDefaultProps;
    components?: string[] | Dict;
}) => (theme: Dict) => any;

withDefaultSize: ({
    size,
    components,
}: {
    size: ThemingProps;
    components?: string[] | Dict;
}) => ThemeExtension;

withDefaultVariant: ({
    variant,
    components,
}: {
    variant: ThemingProps;
    components?: string[] | Dict;
}) => ThemeExtension;

type BaseThemeWithExtensions<
    BaseTheme extends ChakraTheme,
    Extensions extends readonly [...any]
> = BaseTheme &
    (Extensions extends [infer L, ...infer R]
        ? L extends AnyFunction
            ? ReturnType<L> & BaseThemeWithExtensions<BaseTheme, R>
            : L & BaseThemeWithExtensions<BaseTheme, R>
        : Extensions);

type DeepPartial<T> = {
    [P in keyof T]?: T[P] extends object ? DeepPartial<T[P]> : T[P];
};

type ThemeExtension<Override extends ThemeOverride = ThemeOverride> = (
    themeOverride: Override
) => Override;

type ThemeOverride<BaseTheme = Theme> = DeepPartial<ChakraTheme> &
    DeepThemeExtension<BaseTheme, ChakraTheme> &
    Dict;