Fix lint errors

example/App.js

@@ -12,12 +12,12 @@ import ModalStack from './src/ModalStack';
 import LifecycleInteraction from './src/LifecycleInteraction';
 import GestureInteraction from './src/GestureInteraction';
 
-// Uncomment the following line to force RTL. Requires closing and re-opening
-// your app after you first load it with this option enabled.
-// I18nManager.forceRTL(true);
-
 // Comment the following two lines to stop using react-native-screens
 import { useScreens } from 'react-native-screens';
+
+// Uncomment the following line to force RTL. Requires closing and re-opening
+// your app after you first load it with this option enabled.
+I18nManager.forceRTL(false);
 useScreens();
 
 const data = [

example/src/GestureInteraction.js

@@ -5,18 +5,13 @@ import {
   InteractionManager,
   WebView,
   View,
-  StyleSheet,
 } from 'react-native';
 import { MapView } from 'expo';
-import { withNavigationFocus } from 'react-navigation';
 import {
   createStackNavigator,
   StackGestureContext,
 } from 'react-navigation-stack';
-import {
-  PanGestureHandler,
-  NativeViewGestureHandler,
-} from 'react-native-gesture-handler';
+import { NativeViewGestureHandler } from 'react-native-gesture-handler';
 
 const IndexScreen = ({ navigation }) => (
   <View style={{ flex: 1, alignItems: 'center', justifyContent: 'center' }}>

example/src/ImageStack.js

@@ -1,5 +1,5 @@
 import React from 'react';
-import { Dimensions, Button, Image, View, Text } from 'react-native';
+import { Dimensions, Button, Image, View } from 'react-native';
 import { createStackNavigator } from 'react-navigation-stack';
 import { FlatList, BorderlessButton } from 'react-native-gesture-handler';
 

example/src/LifecycleInteraction.js

@@ -1,11 +1,5 @@
 import React from 'react';
-import {
-  ActivityIndicator,
-  Button,
-  Text,
-  View,
-  StyleSheet,
-} from 'react-native';
+import { Button, Text, View, StyleSheet } from 'react-native';
 import { BarCodeScanner } from 'expo';
 import { withNavigationFocus } from 'react-navigation';
 import { createStackNavigator } from 'react-navigation-stack';

src/views/Header/HeaderBackButton.js

@@ -79,13 +79,7 @@ class HeaderBackButton extends React.PureComponent {
   };
 
   _maybeRenderTitle() {
-    const {
-      backTitleVisible,
-      titleStyle,
-      tintColor,
-      truncatedTitle,
-    } = this.props;
-
+    const { backTitleVisible, titleStyle, tintColor } = this.props;
     let backTitleText = this._getTitleText();
 
     if (!backTitleVisible || backTitleText === null) {

src/views/StackView/StackView.js

@@ -1,5 +1,5 @@
 import React from 'react';
-import { Platform, NativeModules } from 'react-native';
+import { NativeModules } from 'react-native';
 
 import { StackActions } from '@react-navigation/core';
 import StackViewLayout from './StackViewLayout';

src/views/StackView/StackViewLayout.js

@@ -1,9 +1,7 @@
 import React from 'react';
-
 import {
   Animated,
   StyleSheet,
-  PanResponder,
   Platform,
   View,
   I18nManager,
@@ -27,8 +25,6 @@ import StackGestureContext from '../../utils/StackGestureContext';
 import clamp from '../../utils/clamp';
 import { supportsImprovedSpringAnimation } from '../../utils/ReactNativeFeatures';
 
-const emptyFunction = () => {};
-
 const IPHONE_XS_HEIGHT = 812; // iPhone X and XS
 const IPHONE_XR_HEIGHT = 896; // iPhone XR and XS Max
 const { width: WINDOW_WIDTH, height: WINDOW_HEIGHT } = Dimensions.get('window');
@@ -63,11 +59,6 @@ const ANIMATION_DURATION = 500;
  */
 const POSITION_THRESHOLD = 1 / 2;
 
-/**
- * The threshold (in pixels) to start the gesture action.
- */
-const RESPOND_THRESHOLD = 20;
-
 /**
  * The distance of touch start from the edge of the screen where the gesture will be recognized
  */
@@ -390,8 +381,6 @@ class StackViewLayout extends React.Component {
 
     // TODO: remove this __getValue!
     let distance = layout.height.__getValue();
-
-    let translationY = nativeEvent.translationY;
     let value = index - nativeEvent.translationY / distance;
     return clamp(index - 1, value, index);
   };
@@ -412,7 +401,7 @@ class StackViewLayout extends React.Component {
     }
   };
 
-  _handleActivateGestureHorizontal = nativeEvent => {
+  _handleActivateGestureHorizontal = () => {
     let { index } = this.props.transitionProps.navigation.state;
 
     if (this._isMotionInverted()) {
@@ -449,7 +438,7 @@ class StackViewLayout extends React.Component {
     }
   };
 
-  _handleActivateGestureVertical = nativeEvent => {
+  _handleActivateGestureVertical = () => {
     let { index } = this.props.transitionProps.navigation.state;
 
     this.setState({
@@ -472,8 +461,7 @@ class StackViewLayout extends React.Component {
 
   _handleReleaseHorizontal = nativeEvent => {
     const {
-      transitionProps: { navigation, position, layout, scene },
-      mode,
+      transitionProps: { navigation, position, layout },
     } = this.props;
     const { index } = navigation.state;
     const immediateIndex =
@@ -525,8 +513,7 @@ class StackViewLayout extends React.Component {
 
   _handleReleaseVertical = nativeEvent => {
     const {
-      transitionProps: { navigation, position, layout, scene },
-      mode,
+      transitionProps: { navigation, position, layout },
     } = this.props;
     const { index } = navigation.state;
     const immediateIndex =

src/views/StackView/createPointerEventsContainer.js

@@ -23,8 +23,6 @@ export default function createPointerEventsContainer(Component) {
       this._bindPosition();
       this._pointerEvents = this._computePointerEvents();
 
-      const { navigation, scene } = this.props;
-
       return (
         <Component
           {...this.props}
@@ -52,7 +50,7 @@ export default function createPointerEventsContainer(Component) {
       );
     }
 
-    _onPositionChange = ({ value }) => {
+    _onPositionChange = (/* { value } */) => {
       // This should log each frame when releasing the gesture or when pressing
       // the back button! If not, something has gone wrong with the animated
       // value subscription

src/views/Transitioner.js

@@ -26,7 +26,7 @@ class Transitioner extends React.Component {
     };
 
     const position = new Animated.Value(this.props.navigation.state.index);
-    this._positionListener = position.addListener(({ value }) => {
+    this._positionListener = position.addListener((/* { value } */) => {
       // This should work until we detach position from a view! so we have to be
       // careful to not ever detach it, thus the gymnastics in _getPosition in
       // StackViewLayout
@@ -60,7 +60,8 @@ class Transitioner extends React.Component {
 
   componentWillUnmount() {
     this._isMounted = false;
-    this._positionListener && this.state.position.removeListener(this._positionListener);
+    this._positionListener &&
+      this.state.position.removeListener(this._positionListener);
   }
 
   // eslint-disable-next-line react/no-deprecated