/**
 * Determines if the code is running in a standard browser environment.
 *
 * This function checks for specific conditions that indicate whether the code is
 * running in a standard browser environment, allowing Axios to work in various
 * environments like web workers, React Native, or NativeScript.
 *
 * @returns {boolean} True if running in a standard browser environment, false otherwise.
 */
export declare const isStandardBrowserEnv: boolean;
/**
 * Determines if the code is running in a standard browser WebWorker environment.
 *
 * This function checks for specific conditions that indicate whether the code is
 * running in a standard browser WebWorker environment. It takes into account the
 * limitations of the `isStandardBrowserEnv` method when working with WebWorkers.
 *
 * @returns {boolean} True if running in a standard browser WebWorker environment, false otherwise.
 */
export declare const isStandardBrowserWebWorkerEnv: boolean;
/**
 * Determine if a value is a FormData
 *
 * @param {*} thing The value to test
 * @returns {boolean} True if value is an FormData, otherwise false
 */
export declare const isFormData: (thing: unknown) => boolean;
/**
 * Utility function to assign a property to an object if the value is defined.
 *
 * @param {Object} obj - The object to which the property will be assigned.
 * @param {string} prop - The property name.
 * @param {*} value - The value to assign if it is defined.
 */
export declare const assignIfDefined: <T extends object>(obj: T, prop: string, value: unknown) => void;