@base-ui-components/react/esm/utils/resolveClassName.js

Base UI is a library of headless ('unstyled') React components and low-level hooks. You gain complete control over your app's CSS and accessibility features.

/**
 * If the provided className is a string, it will be returned as is.
 * Otherwise, the function will call the className function with the state as the first argument.
 *
 * @param className
 * @param state
 */
export function resolveClassName(className, state) {
  return typeof className === 'function' ? className(state) : className;
}