diff --git a/src/navigationStore.js b/src/navigationStore.js
index 3e7b5e87c..a709b7dc2 100644
--- a/src/navigationStore.js
+++ b/src/navigationStore.js
@@ -109,7 +109,9 @@ function getProperties(component = {}) {
   delete res.children;
   return res;
 }
-function createTabBarOptions({ tabBarStyle, activeTintColor, inactiveTintColor, activeBackgroundColor, inactiveBackgroundColor, showLabel, labelStyle, tabStyle, ...props }) {
+function createTabBarOptions({
+  tabBarStyle, activeTintColor, inactiveTintColor, activeBackgroundColor, inactiveBackgroundColor, showLabel, labelStyle, tabStyle, ...props
+}) {
   return {
     ...props,
     style: tabBarStyle,
@@ -253,15 +255,15 @@ function createNavigationOptions(params) {
     }
 
     if (
-      rightButtonImage ||
-      rightTitle ||
-      params.renderRightButton ||
-      onRight ||
-      navigationParams.onRight ||
-      navigationParams.rightTitle ||
-      navigationParams.rightButtonImage ||
-      rightButtonTextStyle ||
-      ((drawerImage || drawerIcon) && !hideDrawerButton && drawerPosition === 'right')
+      rightButtonImage
+      || rightTitle
+      || params.renderRightButton
+      || onRight
+      || navigationParams.onRight
+      || navigationParams.rightTitle
+      || navigationParams.rightButtonImage
+      || rightButtonTextStyle
+      || ((drawerImage || drawerIcon) && !hideDrawerButton && drawerPosition === 'right')
     ) {
       res.headerRight = getValue(navigationParams.right || navigationParams.rightButton || params.renderRightButton, { ...navigationParams, ...screenProps }) || (
         <RightNavBarButton navigation={navigation} {...params} {...navigationParams} {...componentData} />
@@ -269,31 +271,30 @@ function createNavigationOptions(params) {
     }
 
     if (
-      leftButtonImage ||
-      backButtonImage ||
-      backTitle ||
-      leftTitle ||
-      params.renderLeftButton ||
-      leftButtonTextStyle ||
-      renderBackButton ||
-      backButtonTextStyle ||
-      onLeft ||
-      navigationParams.leftTitle ||
-      navigationParams.onLeft ||
-      navigationParams.leftButtonImage ||
-      navigationParams.backButtonImage ||
-      navigationParams.backTitle ||
-      ((drawerImage || drawerIcon) && !hideDrawerButton && drawerPosition !== 'right')
+      leftButtonImage
+      || backButtonImage
+      || backTitle
+      || leftTitle
+      || params.renderLeftButton
+      || leftButtonTextStyle
+      || renderBackButton
+      || backButtonTextStyle
+      || onLeft
+      || navigationParams.leftTitle
+      || navigationParams.onLeft
+      || navigationParams.leftButtonImage
+      || navigationParams.backButtonImage
+      || navigationParams.backTitle
+      || ((drawerImage || drawerIcon) && !hideDrawerButton && drawerPosition !== 'right')
     ) {
       const leftButton = navigationParams.left || navigationParams.leftButton || params.renderLeftButton;
-      res.headerLeft =
-        getValue(leftButton, { ...params, ...navigationParams, ...screenProps }) ||
-        (((onLeft && (leftTitle || navigationParams.leftTitle || leftButtonImage || navigationParams.leftButtonImage)) || drawerImage || drawerIcon) && (
+      res.headerLeft = getValue(leftButton, { ...params, ...navigationParams, ...screenProps })
+        || (((onLeft && (leftTitle || navigationParams.leftTitle || leftButtonImage || navigationParams.leftButtonImage)) || drawerImage || drawerIcon) && (
           <LeftNavBarButton navigation={navigation} {...params} {...navigationParams} {...componentData} />
-        )) ||
-        res.headerLeft ||
-        (init ? null : (!leftButton && renderBackButton && renderBackButton(state)) || (!leftButton && <BackNavBarButton navigation={navigation} {...state} />)) ||
-        null;
+        ))
+        || res.headerLeft
+        || (init ? null : (!leftButton && renderBackButton && renderBackButton(state)) || (!leftButton && <BackNavBarButton navigation={navigation} {...state} />))
+        || null;
     }
 
     if (back) {
@@ -334,7 +335,7 @@ function createNavigationOptions(params) {
 
     if (backToInitial) {
       const userDefinedTabBarOnPress = res.tabBarOnPress;
-      res.tabBarOnPress = data => {
+      res.tabBarOnPress = (data) => {
         if (userDefinedTabBarOnPress) {
           console.warn('backToInitial and tabBarOnPress were both defined and might cause unexpected navigation behaviors. I hope you know what you are doing ;-)');
           userDefinedTabBarOnPress(data);
@@ -365,11 +366,11 @@ function extendProps(props, store: NavigationStore) {
   const res = { ...props };
   for (const transition of Object.keys(props)) {
     if (
-      reservedKeys.indexOf(transition) === -1 &&
-      transition.startsWith('on') &&
-      transition.charAt(2) >= 'A' &&
-      transition.charAt(2) <= 'Z' &&
-      typeof props[transition] === 'string'
+      reservedKeys.indexOf(transition) === -1
+      && transition.startsWith('on')
+      && transition.charAt(2) >= 'A'
+      && transition.charAt(2) <= 'Z'
+      && typeof props[transition] === 'string'
     ) {
       if (store[props[transition]]) {
         res[transition] = params => store[props[transition]](params);
@@ -507,13 +508,13 @@ class NavigationStore {
     }
   }
 
-  setCustomReducer = Navigator => {
+  setCustomReducer = (Navigator) => {
     this.getStateForAction = Navigator.router.getStateForAction;
     const reducer = createReducer();
     Navigator.router.getStateForAction = (cmd, state) => (this.reducer ? this.reducer(state, cmd) : reducer(state, cmd));
   };
 
-  onEnterHandler = async currentScene => {
+  onEnterHandler = async (currentScene) => {
     if (this.states[currentScene]) {
       const handler = this[currentScene + OnEnter];
       const success = this.states[currentScene].success || defaultSuccess;
@@ -533,7 +534,7 @@ class NavigationStore {
     }
   };
 
-  onExitHandler = prevScene => {
+  onExitHandler = (prevScene) => {
     if (prevScene) {
       const exitHandler = this[prevScene + OnExit];
       if (exitHandler) {
@@ -560,13 +561,11 @@ class NavigationStore {
     if (this.currentScene !== this.prevScene) {
       // run onExit for old scene
       this.onExitHandler(this.prevScene);
-      setTimeout(() =>
-        this.dispatch({
-          type: ActionConst.FOCUS,
-          routeName: this.currentScene,
-          params: this.currentParams,
-        }),
-      );
+      setTimeout(() => this.dispatch({
+        type: ActionConst.FOCUS,
+        routeName: this.currentScene,
+        params: this.currentParams,
+      }));
       this.onEnterHandler(currentScene);
     } else {
       const routeName = getRouteNameByKey(this.state, action.key);
@@ -581,7 +580,7 @@ class NavigationStore {
     }
   };
 
-  setTopLevelNavigator = navigatorRef => {
+  setTopLevelNavigator = (navigatorRef) => {
     this._navigator = navigatorRef;
   };
 
@@ -589,7 +588,7 @@ class NavigationStore {
     this.refs[name] = ref;
   };
 
-  deleteRef = name => {
+  deleteRef = (name) => {
     delete this.refs[name];
   };
 
@@ -606,7 +605,7 @@ class NavigationStore {
     return createAppContainer(Navigator);
   };
 
-  createAction = name => args => {
+  createAction = name => (args) => {
     // console.log(`Transition to state=${name}`);
     if (this.isLogical[name]) {
       this[name](args);
@@ -622,8 +621,12 @@ class NavigationStore {
     }
     const res = {};
     const order = [];
-    const { navigator, renderer, contentComponent, drawerWidth, drawerLockMode, tabBarPosition, lazy, duration, ...parentProps } = scene.props;
-    let { tabs, modal, lightbox, overlay, drawer, transitionConfig, tabBarComponent } = parentProps;
+    const {
+      navigator, renderer, contentComponent, drawerWidth, drawerLockMode, tabBarPosition, lazy, duration, ...parentProps
+    } = scene.props;
+    let {
+      tabs, modal, lightbox, overlay, drawer, transitionConfig, tabBarComponent,
+    } = parentProps;
     if (scene.type === Modal) {
       modal = true;
     } else if (scene.type === Drawer) {
@@ -683,7 +686,9 @@ class NavigationStore {
       const key = child.key || `key${(counter += 1)}`;
       const init = key === children[0].key;
       assert(reservedKeys.indexOf(key) === -1, `Scene name cannot be reserved word: ${child.key}`);
-      const { component, type = tabs || drawer ? 'jump' : 'push', path, onEnter, onExit, on, failure, success, wrap, initial = false, ...props } = child.props;
+      const {
+        component, type = tabs || drawer ? 'jump' : 'push', path, onEnter, onExit, on, failure, success, wrap, initial = false, ...props
+      } = child.props;
       if (!this.states[key]) {
         this.states[key] = {};
       }
@@ -861,7 +866,7 @@ class NavigationStore {
     });
   };
 
-  dispatch = action => {
+  dispatch = (action) => {
     if (this.externalDispatch) {
       this.externalAction = action;
       this.externalDispatch(action);