Function isNativeFunction

packages/core/src/utils/supports.ts:96–98

(func: Function)

 */
// eslint-disable-next-line @typescript-eslint/ban-types
export function isNativeFunction(func: Function): boolean {
  return func && /^function\s+\w+\(\)\s+\{\s+\[native code\]\s+\}$/.test(func.toString());
}

/**
 * Tells whether current environment supports Fetch API natively