createActionType.js

export const APP = "r3";

export const createActionType = app => duck => type => `${app}/${duck}/${type}`;

export const createDuckType = createActionType(APP);

/**
 * Constructs a new action with a required type and optional additional action properties supplied as
 * optional argument(s*); *see `...rest` param below.
 *
 * @export
 * @param {string} type the action type
 * @param {...any} rest addition action properties; one or more.
 * @returns {Action} An action with the provided type and any additional props.
 * @throws {TypeError} for an undefined or otherwise invalid type property.
 * @example
 *
 * import import { createDuckType } from ../path/to/import;
 * const createActionType = createDuckType("myReducer");
 * export const MY_ACTION_TYPE = createActionType("MY_ACTION_TYPE");
 */
export function createAction(type, ...rest) {
    if (!type || typeof type !== "string") throw new TypeError(`An invalid type argument was supplied: ${type}`);
    return { type, ...rest };
}