Function interpolate

packages/core/src/internal/interpolate.ts:5–19

(
  strings: TemplateStringsArray | Class,
  interpolations: Class[],
)

// based on https://github.com/lukeed/clsx and https://github.com/jorgebucaran/classcat
export function interpolate(
  strings: TemplateStringsArray | Class,
  interpolations: Class[],
): string {
  return Array.isArray(strings) && Array.isArray((strings as unknown as TemplateStringsArray).raw)
    ? interleave(strings as unknown as TemplateStringsArray, interpolations, (value) =>
        toString(value).trim(),
      )
    : interpolations
        .filter(Boolean)
        .reduce(
          (result: string, value) => result + toString(value),
          strings ? toString(strings as Class) : '',
        )
}

function toString(value: Class): string {
  let result = ''