Function classNames

packages/react-select/src/utils.ts:44–62

(
  prefix?: string | null,
  state?: ClassNamesState,
  ...classNameList: string[]
)

}

export function classNames(
  prefix?: string | null,
  state?: ClassNamesState,
  ...classNameList: string[]
) {
  const arr = [...classNameList];
  if (state && prefix) {
    for (let key in state) {
      if (state.hasOwnProperty(key) && state[key]) {
        arr.push(`${applyPrefixToName(prefix, key)}`);
      }
    }
  }

  return arr
    .filter((i) => i)
    .map((i) => String(i).trim())
    .join(' ');
}
// ==============================
// Clean Value
// ==============================