Fix conditional expression

src/index.ts

@@ -13,18 +13,19 @@ export { createPostCSS } from "./shared";
 
 type GetClassName = (className: string) => string;
 
+interface RecursiveStringObject {
+  [modifier: string]: string | RecursiveStringObject;
+}
+
+export type CSSAttributeValue = string | (string | RecursiveStringObject)[];
+
 /**
  * Tagged template macro function for Tailwind classes
  * @example "tw" => tw`p-2 text-center`
  */
 export interface TailwindFunction {
   (strings: TemplateStringsArray): string;
-  (
-    ...args: (
-      | string
-      | ({ data?: { [key: string]: string } } & { [modifier: string]: string })
-    )[]
-  ): string;
+  (...args: (string | RecursiveStringObject)[]): string;
 }
 
 export interface TailwindPluginOptions {