Function typeName

packages/shared/CheckStringCoercion.js:21–32

(value: mixed)

// $FlowFixMe[incompatible-return] only called in DEV, so void return is not possible.
function typeName(value: mixed): string {
  if (__DEV__) {
    // toStringTag is needed for namespaced types like Temporal.Instant
    const hasToStringTag = typeof Symbol === 'function' && Symbol.toStringTag;
    const type =
      (hasToStringTag && (value: any)[Symbol.toStringTag]) ||
      (value: any).constructor.name ||
      'Object';
    // $FlowFixMe[incompatible-return]
    return type;
  }
}

// $FlowFixMe[incompatible-return] only called in DEV, so void return is not possible.
function willCoercionThrow(value: mixed): boolean {