Store - vanilla JS TEA/Redux module

store.js

export const dispatch = e => window.dispatchEvent(e);

const handler = subscribe => state => update => action => {
    const [newState, cmds] = update(state)(action);

    if (state != newState) {
        subscribe(newState);
    }
    state = newState;
    if (cmds && cmds.length > 0) {
        cmds.forEach(cmd => {
            cmd(state); // TODO CMD returns plain actions and Dispatch action here
        });
    }
};

const domActor = eventHandler => events => {
    events.forEach(([key, reducer]) => {
        window.addEventListener(key, eventHandler(reducer), false);
    });
};

export const store = (render, initState, events) =>
    domActor(handler(render)(initState))(events);