import { Primitive } from '@sentry/types';
/**
* Checks whether given value's type is one of a few Error or Error-like
* {@link isError}.
*
* @param wat A value to be checked.
* @returns A boolean representing the result.
*/
export declare function isError(wat: unknown): wat is Error;
/**
* Checks whether given value's type is ErrorEvent
* {@link isErrorEvent}.
*
* @param wat A value to be checked.
* @returns A boolean representing the result.
*/
export declare function isErrorEvent(wat: unknown): boolean;
/**
* Checks whether given value's type is DOMError
* {@link isDOMError}.
*
* @param wat A value to be checked.
* @returns A boolean representing the result.
*/
export declare function isDOMError(wat: unknown): boolean;
/**
* Checks whether given value's type is DOMException
* {@link isDOMException}.
*
* @param wat A value to be checked.
* @returns A boolean representing the result.
*/
export declare function isDOMException(wat: unknown): boolean;
/**
* Checks whether given value's type is a string
* {@link isString}.
*
* @param wat A value to be checked.
* @returns A boolean representing the result.
*/
export declare function isString(wat: unknown): wat is string;
/**
* Checks whether given value is a primitive (undefined, null, number, boolean, string, bigint, symbol)
* {@link isPrimitive}.
*
* @param wat A value to be checked.
* @returns A boolean representing the result.
*/
export declare function isPrimitive(wat: unknown): wat is Primitive;
/**
* Checks whether given value's type is an object literal
* {@link isPlainObject}.
*
* @param wat A value to be checked.
* @returns A boolean representing the result.
*/
export declare function isPlainObject(wat: unknown): wat is Record<string, unknown>;
/**
* Checks whether given value's type is an Event instance
* {@link isEvent}.
*
* @param wat A value to be checked.
* @returns A boolean representing the result.
*/
export declare function isEvent(wat: unknown): boolean;
/**
* Checks whether given value's type is an Element instance
* {@link isElement}.
*
* @param wat A value to be checked.
* @returns A boolean representing the result.
*/
export declare function isElement(wat: unknown): boolean;
/**
* Checks whether given value's type is an regexp
* {@link isRegExp}.
*
* @param wat A value to be checked.
* @returns A boolean representing the result.
*/
export declare function isRegExp(wat: unknown): wat is RegExp;
/**
* Checks whether given value has a then function.
* @param wat A value to be checked.
*/
export declare function isThenable(wat: any): wat is PromiseLike<any>;
/**
* Checks whether given value's type is a SyntheticEvent
* {@link isSyntheticEvent}.
*
* @param wat A value to be checked.
* @returns A boolean representing the result.
*/
export declare function isSyntheticEvent(wat: unknown): boolean;
/**
* Checks whether given value is NaN
* {@link isNaN}.
*
* @param wat A value to be checked.
* @returns A boolean representing the result.
*/
export declare function isNaN(wat: unknown): boolean;
/**
* Checks whether given value's type is an instance of provided constructor.
* {@link isInstanceOf}.
*
* @param wat A value to be checked.
* @param base A constructor to be used in a check.
* @returns A boolean representing the result.
*/
export declare function isInstanceOf(wat: any, base: any): boolean;
//# sourceMappingURL=is.d.ts.map