import type { Middleware } from 'redux'; /** * Returns true if the passed value is "plain", i.e. a value that is either * directly JSON-serializable (boolean, number, string, array, plain object) * or `undefined`. * * @param val The value to check. * * @public */ export declare function isPlain(val: any): boolean; interface NonSerializableValue { keyPath: string; value: unknown; } /** * @public */ export declare function findNonSerializableValue(value: unknown, path?: string, isSerializable?: (value: unknown) => boolean, getEntries?: (value: unknown) => [string, any][], ignoredPaths?: readonly string[]): NonSerializableValue | false; /** * Options for `createSerializableStateInvariantMiddleware()`. * * @public */ export interface SerializableStateInvariantMiddlewareOptions { /** * The function to check if a value is considered serializable. This * function is applied recursively to every value contained in the * state. Defaults to `isPlain()`. */ isSerializable?: (value: any) => boolean; /** * The function that will be used to retrieve entries from each * value. If unspecified, `Object.entries` will be used. Defaults * to `undefined`. */ getEntries?: (value: any) => [string, any][]; /** * An array of action types to ignore when checking for serializability. * Defaults to [] */ ignoredActions?: string[]; /** * An array of dot-separated path strings to ignore when checking * for serializability, Defaults to ['meta.arg'] */ ignoredActionPaths?: string[]; /** * An array of dot-separated path strings to ignore when checking * for serializability, Defaults to [] */ ignoredPaths?: string[]; /** * Execution time warning threshold. If the middleware takes longer * than `warnAfter` ms, a warning will be displayed in the console. * Defaults to 32ms. */ warnAfter?: number; /** * Opt out of checking state, but continue checking actions */ ignoreState?: boolean; } /** * Creates a middleware that, after every state change, checks if the new * state is serializable. If a non-serializable value is found within the * state, an error is printed to the console. * * @param options Middleware options. * * @public */ export declare function createSerializableStateInvariantMiddleware(options?: SerializableStateInvariantMiddlewareOptions): Middleware; export {};