Function joinFuncishClassNames

packages/preact/src/options-manip.ts:78–101

(
  input0: FuncishClassNameInput, // added to string first
  input1: FuncishClassNameInput,
  optionName: string,
)

invalid values before the formal refinement pass.
*/
export function joinFuncishClassNames(
  input0: FuncishClassNameInput, // added to string first
  input1: FuncishClassNameInput,
  optionName: string,
): FuncishClassNameInput {
  const isFunc0 = typeof input0 === 'function'
  const isFunc1 = typeof input1 === 'function'

  if (isFunc0 || isFunc1) {
    const combinedFunc = (info: any) => {
      return joinClassNames(
        refineClassName(isFunc0 ? input0(info) : input0, optionName),
        refineClassName(isFunc1 ? input1(info) : input1, optionName),
      )
    }
    (combinedFunc as any).parts = [input0, input1] // see CalendarDataManager::processRawCalendarOptions
    return combinedFunc
  }

  return joinClassNames(
    refineClassName(input0 as ClassNameInput, optionName),
    refineClassName(input1 as ClassNameInput, optionName),
  )
}

export function mergeContentInjectors(
  contentGenerator0: ContentGenerator<any>, // fallback