Bump version -> 2.0.0-alpha.29

This change removes the behavior that's been added for an unclear reason. We may consider reverting this one, however I was unable to reproduce a problem when setting header title view layout measurements was necessary. To the contrary it was causing issues in the case when the title header view updates. In such a case we would never update width/height so the updated view might be cropped. In addition we are changing the way we schedule native layout updates. Previously we'd use handler.post but it was causing one frame delay so this change migrates us to use choreographer.

Example/yarn.lock

@@ -1633,7 +1633,7 @@ combined-stream@~1.0.6:
   dependencies:
     delayed-stream "~1.0.0"
 
-commander@^2.19.0, commander@~2.20.0:
+commander@^2.19.0:
   version "2.20.0"
   resolved "https://registry.yarnpkg.com/commander/-/commander-2.20.0.tgz#d58bb2b5c1ee8f87b0d340027e9e94e222c5a422"
   integrity sha512-7j2y+40w61zy6YC2iRNpUe/NwhNyoXrYpHMrSunaMG64nRnaf96zO/KMQR4OyN/UnE5KLyEBnKHd4aG3rskjpQ==
@@ -1642,6 +1642,11 @@ commander@~2.13.0:
   version "2.13.0"
   resolved "https://registry.yarnpkg.com/commander/-/commander-2.13.0.tgz#6964bca67685df7c1f1430c584f07d7597885b9c"
 
+commander@~2.20.3:
+  version "2.20.3"
+  resolved "https://registry.yarnpkg.com/commander/-/commander-2.20.3.tgz#fd485e84c03eb4881c20722ba48035e8531aeb33"
+  integrity sha512-GpVkmM8vF2vQUkj2LvZmD35JxeJOLCwJ9cUkugyk2nuhbv3+mJvpLYYt+0+USMxE+oj+ey/lJEnhZw75x/OMcQ==
+
 commondir@^1.0.1:
   version "1.0.1"
   resolved "https://registry.yarnpkg.com/commondir/-/commondir-1.0.1.tgz#ddd800da0c66127393cca5950ea968a3aaf1253b"
@@ -2487,9 +2492,9 @@ growly@^1.3.0:
   resolved "https://registry.yarnpkg.com/growly/-/growly-1.3.0.tgz#f10748cbe76af964b7c96c93c6bcc28af120c081"
 
 handlebars@^4.0.3:
-  version "4.2.0"
-  resolved "https://registry.yarnpkg.com/handlebars/-/handlebars-4.2.0.tgz#57ce8d2175b9bbb3d8b3cf3e4217b1aec8ddcb2e"
-  integrity sha512-Kb4xn5Qh1cxAKvQnzNWZ512DhABzyFNmsaJf3OAkWNa4NkaqWcNI8Tao8Tasi0/F4JD9oyG0YxuFyvyR57d+Gw==
+  version "4.5.3"
+  resolved "https://registry.yarnpkg.com/handlebars/-/handlebars-4.5.3.tgz#5cf75bd8714f7605713511a56be7c349becb0482"
+  integrity sha512-3yPecJoJHK/4c6aZhSvxOyG4vJKDshV36VHp0iVCDVh7o9w2vwi3NSnL2MMPj3YdduqaBcu7cGbggJQM0br9xA==
   dependencies:
     neo-async "^2.6.0"
     optimist "^0.6.1"
@@ -4806,7 +4811,7 @@ react-native-safe-area-view@^0.14.1:
     debounce "^1.2.0"
 
 "react-native-screens@file:..":
-  version "2.0.0-alpha.3"
+  version "2.0.0-alpha.22"
   dependencies:
     debounce "^1.2.0"
 
@@ -5761,11 +5766,11 @@ uglify-es@^3.1.9:
     source-map "~0.6.1"
 
 uglify-js@^3.1.4:
-  version "3.6.0"
-  resolved "https://registry.yarnpkg.com/uglify-js/-/uglify-js-3.6.0.tgz#704681345c53a8b2079fb6cec294b05ead242ff5"
-  integrity sha512-W+jrUHJr3DXKhrsS7NUVxn3zqMOFn0hL/Ei6v0anCIMoKC93TjcflTagwIHLW7SfMFfiQuktQyFVCFHGUE0+yg==
+  version "3.7.3"
+  resolved "https://registry.yarnpkg.com/uglify-js/-/uglify-js-3.7.3.tgz#f918fce9182f466d5140f24bb0ff35c2d32dcc6a"
+  integrity sha512-7tINm46/3puUA4hCkKYo4Xdts+JDaVC9ZPRcG8Xw9R4nhO/gZgUM3TENq8IF4Vatk8qCig4MzP/c8G4u2BkVQg==
   dependencies:
-    commander "~2.20.0"
+    commander "~2.20.3"
     source-map "~0.6.1"
 
 ultron@1.0.x:

README.md

@@ -100,12 +100,12 @@ To do that react-native-screens provides you with two components documented belo
 ### `<ScreenContainer/>`
 
 This component is a container for one or more `Screen` components.
-It does not accept other component types are direct children.
-The role of container is to control which of its children screens should be attached to the view hierarchy.
-It does that by monitoring `active` property of each of its children.
-It it possible to have as many `active` children as you'd like but in order for the component to be the most efficient we should keep the number of active screens to the minimum.
-In a case of stack navigator or tabs navigator we only want to have one active screen (the top most view on a stack or the selected tab).
-Then for the time of transitioning between views we may want to activate a second screen for the duration of transition, and then go back to just one active screen.
+It does not accept other component types as direct children.
+The role of the container is to control which of its children screens should be attached to the view hierarchy.
+It does that by monitoring the `active` property of each of its children.
+It is possible to have as many `active` children as you'd like but in order for the component to be the most efficient we should keep the number of active screens to a minimum.
+In a case of a stack navigator or tabs navigator we only want to have one active screen (the top most view on a stack or the selected tab).
+While transitioning between views we may want to activate a second screen for the duration of the transition, and then go back to just one active screen.
 
 ### `<Screen/>`
 

android/src/main/java/com/swmansion/rnscreens/ScreenContainer.java

@@ -25,7 +25,7 @@ public class ScreenContainer<T extends ScreenFragment> extends ViewGroup {
   private final Set<ScreenFragment> mActiveScreenFragments = new HashSet<>();
   private final ArrayList<Runnable> mAfterTransitionRunnables = new ArrayList<>(1);
 
-  private @Nullable FragmentManager mFragmentManager;
+  protected @Nullable FragmentManager mFragmentManager;
   private @Nullable FragmentTransaction mCurrentTransaction;
   private @Nullable FragmentTransaction mProcessingTransaction;
   private boolean mNeedUpdate;
@@ -33,6 +33,7 @@ public class ScreenContainer<T extends ScreenFragment> extends ViewGroup {
   private boolean mIsTransitioning;
   private boolean mLayoutEnqueued = false;
 
+
   private final ChoreographerCompat.FrameCallback mFrameCallback = new ChoreographerCompat.FrameCallback() {
     @Override
     public void doFrame(long frameTimeNanos) {
@@ -40,9 +41,9 @@ public class ScreenContainer<T extends ScreenFragment> extends ViewGroup {
     }
   };
 
-  private final Runnable mLayoutRunnable = new Runnable() {
+  private final ChoreographerCompat.FrameCallback mLayoutCallback = new ChoreographerCompat.FrameCallback() {
     @Override
-    public void run() {
+    public void doFrame(long frameTimeNanos) {
       mLayoutEnqueued = false;
       measure(
               MeasureSpec.makeMeasureSpec(getWidth(), MeasureSpec.EXACTLY),
@@ -66,9 +67,13 @@ public class ScreenContainer<T extends ScreenFragment> extends ViewGroup {
   public void requestLayout() {
     super.requestLayout();
 
-    if (!mLayoutEnqueued) {
+    if (!mLayoutEnqueued && mLayoutCallback != null) {
       mLayoutEnqueued = true;
-      post(mLayoutRunnable);
+      // we use NATIVE_ANIMATED_MODULE choreographer queue because it allows us to catch the current
+      // looper loop instead of enqueueing the update in the next loop causing a one frame delay.
+      ReactChoreographer.getInstance().postFrameCallback(
+              ReactChoreographer.CallbackType.NATIVE_ANIMATED_MODULE,
+              mLayoutCallback);
     }
   }
 
@@ -184,16 +189,9 @@ public class ScreenContainer<T extends ScreenFragment> extends ViewGroup {
     return ((FragmentActivity) context).getSupportFragmentManager();
   }
 
-  protected final FragmentManager getFragmentManager() {
-    if (mFragmentManager == null) {
-      mFragmentManager = findFragmentManager();
-    }
-    return mFragmentManager;
-  }
-
   protected FragmentTransaction getOrCreateTransaction() {
     if (mCurrentTransaction == null) {
-      mCurrentTransaction = getFragmentManager().beginTransaction();
+      mCurrentTransaction = mFragmentManager.beginTransaction();
       mCurrentTransaction.setReorderingAllowed(true);
     }
     return mCurrentTransaction;
@@ -243,24 +241,12 @@ public class ScreenContainer<T extends ScreenFragment> extends ViewGroup {
     return mScreenFragments.contains(screenFragment);
   }
 
-  protected void ensureFragmentManager() {
-    if (mFragmentManager != null && mFragmentManager.isDestroyed()) {
-      // When fragmentManager is destroyed, try to remove current fragment's views
-      for (int i = 0, size = mScreenFragments.size(); i < size; i++) {
-        ScreenFragment screenFragment = mScreenFragments.get(i);
-        removeView(screenFragment.getScreenRootView());
-      }
-      mFragmentManager = null;
-      mActiveScreenFragments.clear();
-      mNeedUpdate = true;
-    }
-  }
-
   @Override
   protected void onAttachedToWindow() {
     super.onAttachedToWindow();
     mIsAttached = true;
-    ensureFragmentManager();
+    mNeedUpdate = true;
+    mFragmentManager = findFragmentManager();
     updateIfNeeded();
   }
 
@@ -268,6 +254,14 @@ public class ScreenContainer<T extends ScreenFragment> extends ViewGroup {
   protected void onDetachedFromWindow() {
     super.onDetachedFromWindow();
     mIsAttached = false;
+
+    // fragment manager is destroyed so we can't do anything with it anymore
+    mFragmentManager = null;
+    // so we don't add the same screen twice after re-attach
+    removeAllViews();
+    mActiveScreenFragments.clear();
+    // after re-attach we'll update the screen and add views again
+    markUpdated();
   }
 
   @Override

android/src/main/java/com/swmansion/rnscreens/ScreenFragment.java

@@ -1,13 +1,11 @@
 package com.swmansion.rnscreens;
 
 import android.annotation.SuppressLint;
-import android.content.Context;
 import android.os.Bundle;
 import android.view.LayoutInflater;
 import android.view.View;
 import android.view.ViewGroup;
 
-import androidx.annotation.NonNull;
 import androidx.annotation.Nullable;
 import androidx.fragment.app.Fragment;
 
@@ -35,10 +33,6 @@ public class ScreenFragment extends Fragment {
     return mScreenView;
   }
 
-  protected ViewGroup getScreenRootView() {
-    return mScreenView;
-  }
-
   public Screen getScreen() {
     return mScreenView;
   }

android/src/main/java/com/swmansion/rnscreens/ScreenStack.java

@@ -22,7 +22,7 @@ public class ScreenStack extends ScreenContainer<ScreenStackFragment> {
   private final FragmentManager.OnBackStackChangedListener mBackStackListener = new FragmentManager.OnBackStackChangedListener() {
     @Override
     public void onBackStackChanged() {
-      if (getFragmentManager().getBackStackEntryCount() == 0) {
+      if (mFragmentManager.getBackStackEntryCount() == 0) {
         // when back stack entry count hits 0 it means the user's navigated back using hw back
         // button. As the "fake" transaction we installed on the back stack does nothing we need
         // to handle back navigation on our own.
@@ -70,24 +70,24 @@ public class ScreenStack extends ScreenContainer<ScreenStackFragment> {
 
   @Override
   protected void onDetachedFromWindow() {
-    super.onDetachedFromWindow();
-    FragmentManager fm = getFragmentManager();
-    fm.removeOnBackStackChangedListener(mBackStackListener);
-    getFragmentManager().unregisterFragmentLifecycleCallbacks(mLifecycleCallbacks);
-    if (!fm.isStateSaved()) {
-      // state save means that the container where fragment manager was installed has been unmounted.
-      // This could happen as a result of dismissing nested stack. In such a case we don't need to
-      // reset back stack as it'd result in a crash caused by the fact the fragment manager is no
-      // longer attached.
-      fm.popBackStack(BACK_STACK_TAG, FragmentManager.POP_BACK_STACK_INCLUSIVE);
+    if (mFragmentManager != null) {
+      mFragmentManager.removeOnBackStackChangedListener(mBackStackListener);
+      mFragmentManager.unregisterFragmentLifecycleCallbacks(mLifecycleCallbacks);
+      if (!mFragmentManager.isStateSaved()) {
+        // state save means that the container where fragment manager was installed has been unmounted.
+        // This could happen as a result of dismissing nested stack. In such a case we don't need to
+        // reset back stack as it'd result in a crash caused by the fact the fragment manager is no
+        // longer attached.
+        mFragmentManager.popBackStack(BACK_STACK_TAG, FragmentManager.POP_BACK_STACK_INCLUSIVE);
+      }
     }
-
+    super.onDetachedFromWindow();
   }
 
   @Override
   protected void onAttachedToWindow() {
     super.onAttachedToWindow();
-    getFragmentManager().registerFragmentLifecycleCallbacks(mLifecycleCallbacks, false);
+    mFragmentManager.registerFragmentLifecycleCallbacks(mLifecycleCallbacks, false);
   }
 
   @Override
@@ -230,8 +230,8 @@ public class ScreenStack extends ScreenContainer<ScreenStackFragment> {
       // notified when it gets resumed so that we can install the handler.
       return;
     }
-    getFragmentManager().removeOnBackStackChangedListener(mBackStackListener);
-    getFragmentManager().popBackStack(BACK_STACK_TAG, FragmentManager.POP_BACK_STACK_INCLUSIVE);
+    mFragmentManager.removeOnBackStackChangedListener(mBackStackListener);
+    mFragmentManager.popBackStack(BACK_STACK_TAG, FragmentManager.POP_BACK_STACK_INCLUSIVE);
     ScreenStackFragment firstScreen = null;
     for (int i = 0, size = mStack.size(); i < size; i++) {
       ScreenStackFragment screen = mStack.get(i);
@@ -241,14 +241,13 @@ public class ScreenStack extends ScreenContainer<ScreenStackFragment> {
       }
     }
     if (topScreen != firstScreen && topScreen.isDismissable()) {
-      getFragmentManager()
+      mFragmentManager
               .beginTransaction()
-              .hide(topScreen)
               .show(topScreen)
               .addToBackStack(BACK_STACK_TAG)
               .setPrimaryNavigationFragment(topScreen)
               .commitAllowingStateLoss();
-      getFragmentManager().addOnBackStackChangedListener(mBackStackListener);
+      mFragmentManager.addOnBackStackChangedListener(mBackStackListener);
     }
   }
 }

android/src/main/java/com/swmansion/rnscreens/ScreenStackFragment.java

@@ -96,11 +96,6 @@ public class ScreenStackFragment extends ScreenFragment {
     return mScreenRootView;
   }
 
-  @Override
-  protected ViewGroup getScreenRootView() {
-    return mScreenRootView;
-  }
-
   public boolean isDismissable() {
     View child = mScreenView.getChildAt(0);
     if (child instanceof ScreenStackHeaderConfig) {

android/src/main/java/com/swmansion/rnscreens/ScreenStackHeaderConfig.java

@@ -33,6 +33,7 @@ public class ScreenStackHeaderConfig extends ViewGroup {
   private boolean mGestureEnabled = true;
   private boolean mIsBackButtonHidden;
   private boolean mIsShadowHidden;
+  private boolean mDestroyed;
   private int mTintColor;
   private final Toolbar mToolbar;
 
@@ -50,6 +51,10 @@ public class ScreenStackHeaderConfig extends ViewGroup {
     setVisibility(View.GONE);
 
     mToolbar = new Toolbar(context);
+    // reset content insets to be 0 to allow react position custom navbar views. Note that this does
+    // not affect platform native back button as toolbar does not apply left inset when navigation
+    // button is specified
+    mToolbar.setContentInsetsAbsolute(0, 0);
 
     // set primary color as background by default
     TypedValue tv = new TypedValue();
@@ -63,6 +68,10 @@ public class ScreenStackHeaderConfig extends ViewGroup {
     // no-op
   }
 
+  public void destroy() {
+    mDestroyed = true;
+  }
+
   @Override
   protected void onAttachedToWindow() {
     super.onAttachedToWindow();
@@ -116,7 +125,7 @@ public class ScreenStackHeaderConfig extends ViewGroup {
     boolean isRoot = stack == null ? true : stack.getRootScreen() == parent;
     boolean isTop = stack == null ? true : stack.getTopScreen() == parent;
 
-    if (!mIsAttachedToWindow || !isTop) {
+    if (!mIsAttachedToWindow || !isTop || mDestroyed) {
       return;
     }
 
@@ -225,7 +234,7 @@ public class ScreenStackHeaderConfig extends ViewGroup {
   }
 
   private void maybeUpdate() {
-    if (getParent() != null) {
+    if (getParent() != null && !mDestroyed) {
       onUpdate();
     }
   }

android/src/main/java/com/swmansion/rnscreens/ScreenStackHeaderConfigViewManager.java

@@ -4,11 +4,12 @@ import android.view.View;
 
 import com.facebook.react.bridge.JSApplicationCausedNativeException;
 import com.facebook.react.module.annotations.ReactModule;
-import com.facebook.react.uimanager.PixelUtil;
 import com.facebook.react.uimanager.ThemedReactContext;
 import com.facebook.react.uimanager.ViewGroupManager;
 import com.facebook.react.uimanager.annotations.ReactProp;
 
+import javax.annotation.Nonnull;
+
 @ReactModule(name = ScreenStackHeaderConfigViewManager.REACT_CLASS)
 public class ScreenStackHeaderConfigViewManager extends ViewGroupManager<ScreenStackHeaderConfig> {
 
@@ -32,6 +33,11 @@ public class ScreenStackHeaderConfigViewManager extends ViewGroupManager<ScreenS
     parent.addConfigSubview((ScreenStackHeaderSubview) child, index);
   }
 
+  @Override
+  public void onDropViewInstance(@Nonnull ScreenStackHeaderConfig view) {
+    view.destroy();
+  }
+
   @Override
   public void removeAllViews(ScreenStackHeaderConfig parent) {
     parent.removeAllConfigSubviews();

android/src/main/java/com/swmansion/rnscreens/ScreenStackHeaderSubview.java

@@ -43,18 +43,15 @@ public class ScreenStackHeaderSubview extends ReactViewGroup {
 
   @Override
   protected void onLayout(boolean changed, int left, int top, int right, int bottom) {
-    if (changed && (mType == Type.CENTER || mType == Type.TITLE)) {
+    if (changed && (mType == Type.CENTER)) {
+      // if we want the view to be centered we need to account for the fact that right and left
+      // paddings may not be equal.
       Measurements measurements = new Measurements();
-      measurements.width = right - left;
-      if (mType == Type.CENTER) {
-        // if we want the view to be centered we need to account for the fact that right and left
-        // paddings may not be equal.
-        View parent = (View) getParent();
-        int parentWidth = parent.getWidth();
-        int rightPadding = parentWidth - right;
-        int leftPadding = left;
-        measurements.width = Math.max(0, parentWidth - 2 * Math.max(rightPadding, leftPadding));
-      }
+      View parent = (View) getParent();
+      int parentWidth = parent.getWidth();
+      int rightPadding = parentWidth - right;
+      int leftPadding = left;
+      measurements.width = Math.max(0, parentWidth - 2 * Math.max(rightPadding, leftPadding));
       measurements.height = bottom - top;
       mUIManager.setViewLocalData(getId(), measurements);
     }

ios/RNSScreenStack.m

@@ -102,7 +102,16 @@
   RCTRootContentView *rootView = (RCTRootContentView *)parent;
   [rootView.touchHandler cancel];
 
-  return _controller.viewControllers.count > 1;
+  UIView *topView = _controller.viewControllers.lastObject.view;
+  RNSScreenStackHeaderConfig *config = nil;
+  for (UIView *subview in topView.reactSubviews) {
+    if ([subview isKindOfClass:[RNSScreenStackHeaderConfig class]]) {
+      config = (RNSScreenStackHeaderConfig*) subview;
+      break;
+    }
+  }
+
+  return _controller.viewControllers.count > 1 && (config == nil || config.gestureEnabled);
 }
 
 - (void)markChildUpdated

ios/RNSScreenStackHeaderConfig.m

@@ -267,7 +267,6 @@
   }
 
   [navctr setNavigationBarHidden:shouldHide animated:YES];
-  navctr.interactivePopGestureRecognizer.enabled = config.gestureEnabled;
 #ifdef __IPHONE_13_0
   if (@available(iOS 13.0, *)) {
     vc.modalInPresentation = !config.gestureEnabled;

package.json

@@ -1,6 +1,6 @@
 {
   "name": "react-native-screens",
-  "version": "2.0.0-alpha.24",
+  "version": "2.0.0-alpha.29",
   "description": "First incomplete navigation solution for your react-native app.",
   "scripts": {
     "start": "node node_modules/react-native/local-cli/cli.js start",

yarn.lock

@@ -1741,10 +1741,10 @@ commander@~2.13.0:
   version "2.13.0"
   resolved "https://registry.yarnpkg.com/commander/-/commander-2.13.0.tgz#6964bca67685df7c1f1430c584f07d7597885b9c"
 
-commander@~2.20.0:
-  version "2.20.0"
-  resolved "https://registry.yarnpkg.com/commander/-/commander-2.20.0.tgz#d58bb2b5c1ee8f87b0d340027e9e94e222c5a422"
-  integrity sha512-7j2y+40w61zy6YC2iRNpUe/NwhNyoXrYpHMrSunaMG64nRnaf96zO/KMQR4OyN/UnE5KLyEBnKHd4aG3rskjpQ==
+commander@~2.20.3:
+  version "2.20.3"
+  resolved "https://registry.yarnpkg.com/commander/-/commander-2.20.3.tgz#fd485e84c03eb4881c20722ba48035e8531aeb33"
+  integrity sha512-GpVkmM8vF2vQUkj2LvZmD35JxeJOLCwJ9cUkugyk2nuhbv3+mJvpLYYt+0+USMxE+oj+ey/lJEnhZw75x/OMcQ==
 
 commondir@^1.0.1:
   version "1.0.1"
@@ -2765,9 +2765,9 @@ growly@^1.3.0:
   resolved "https://registry.yarnpkg.com/growly/-/growly-1.3.0.tgz#f10748cbe76af964b7c96c93c6bcc28af120c081"
 
 handlebars@^4.0.3:
-  version "4.1.2"
-  resolved "https://registry.yarnpkg.com/handlebars/-/handlebars-4.1.2.tgz#b6b37c1ced0306b221e094fc7aca3ec23b131b67"
-  integrity sha512-nvfrjqvt9xQ8Z/w0ijewdD/vvWDTOweBUm96NTr66Wfvo1mJenBLwcYmPs3TIBP5ruzYGD7Hx/DaM9RmhroGPw==
+  version "4.5.3"
+  resolved "https://registry.yarnpkg.com/handlebars/-/handlebars-4.5.3.tgz#5cf75bd8714f7605713511a56be7c349becb0482"
+  integrity sha512-3yPecJoJHK/4c6aZhSvxOyG4vJKDshV36VHp0iVCDVh7o9w2vwi3NSnL2MMPj3YdduqaBcu7cGbggJQM0br9xA==
   dependencies:
     neo-async "^2.6.0"
     optimist "^0.6.1"
@@ -5855,11 +5855,11 @@ uglify-es@^3.1.9:
     source-map "~0.6.1"
 
 uglify-js@^3.1.4:
-  version "3.6.0"
-  resolved "https://registry.yarnpkg.com/uglify-js/-/uglify-js-3.6.0.tgz#704681345c53a8b2079fb6cec294b05ead242ff5"
-  integrity sha512-W+jrUHJr3DXKhrsS7NUVxn3zqMOFn0hL/Ei6v0anCIMoKC93TjcflTagwIHLW7SfMFfiQuktQyFVCFHGUE0+yg==
+  version "3.7.3"
+  resolved "https://registry.yarnpkg.com/uglify-js/-/uglify-js-3.7.3.tgz#f918fce9182f466d5140f24bb0ff35c2d32dcc6a"
+  integrity sha512-7tINm46/3puUA4hCkKYo4Xdts+JDaVC9ZPRcG8Xw9R4nhO/gZgUM3TENq8IF4Vatk8qCig4MzP/c8G4u2BkVQg==
   dependencies:
-    commander "~2.20.0"
+    commander "~2.20.3"
     source-map "~0.6.1"
 
 ultron@1.0.x: