mitmproxy/web/src/js/actions.js

var ActionTypes = {
    UPDATE_SETTINGS: "update_settings",
    ADD_EVENT: "add_event"
};

var SettingsActions = {
    update: function (settings) {
        settings = _.merge({}, SettingsStore.getAll(), settings);
        //TODO: Update server.

        //Facebook Flux: We do an optimistic update on the client already.
        AppDispatcher.dispatchViewAction({
            type: ActionTypes.UPDATE_SETTINGS,
            settings: settings
        });
    }
};