/**
 * Checks if the current device is an iOS device or running Safari using the `navigator.userAgent` property.
 *
 * @returns{boolean} `true` if the device is an iOS device or running Safari, `false` otherwise.
 * @example* const isIosOrSafari = checkIosOrSafari();
 * if (isIosOrSafari) {
 *   console.log('This is an iOS device or running Safari');
 * } else {
 *   console.log('This is not an iOS device or running Safari');
 * }
 */
export declare function isIosOrSafari(): boolean;