disable momentum scrolling for vertical ScrollView

Libraries/Components/ScrollView/ScrollView.js

@@ -401,8 +401,8 @@ export type Props = $ReadOnly<{|
   /**
    * When true, the scroll view stops on the next index (in relation to scroll
    * position at release) regardless of how fast the gesture is. This can be
-   * used for horizontal pagination when the page is less than the width of
-   * the ScrollView. The default value is false.
+   * used for pagination when the page is less than the width of the
+   * horizontal ScrollView or the height of the vertical ScrollView. The default value is false.
    */
   disableIntervalMomentum?: ?boolean,
   /**

React/Views/ScrollView/RCTScrollView.m

@@ -738,6 +738,8 @@ - (void)scrollViewWillEndDragging:(UIScrollView *)scrollView withVelocity:(CGPoi
     if (isHorizontal) {
       // Use current scroll offset to determine the next index to snap to when momentum disabled
       targetContentOffsetAlongAxis = self.disableIntervalMomentum ? scrollView.contentOffset.x : targetContentOffset->x;
+    } else {
+      targetContentOffsetAlongAxis = self.disableIntervalMomentum ? scrollView.contentOffset.y : targetContentOffset->y;
     }
 
     // Offset based on desired alignment

ReactAndroid/src/main/java/com/facebook/react/views/scroll/ReactScrollView.java

@@ -73,6 +73,7 @@ public class ReactScrollView extends ScrollView
   private @Nullable String mScrollPerfTag;
   private @Nullable Drawable mEndBackground;
   private int mEndFillColor = Color.TRANSPARENT;
+  private boolean mDisableIntervalMomentum = false;
   private int mSnapInterval = 0;
   private float mDecelerationRate = 0.985f;
   private @Nullable List<Integer> mSnapOffsets;
@@ -135,6 +136,10 @@ private OverScroller getOverScrollerFromParent() {
     return scroller;
   }
 
+  public void setDisableIntervalMomentum(boolean disableIntervalMomentum) {
+    mDisableIntervalMomentum = disableIntervalMomentum;
+  }
+
   public void setSendMomentumEvents(boolean sendMomentumEvents) {
     mSendMomentumEvents = sendMomentumEvents;
   }
@@ -609,6 +614,10 @@ private void flingAndSnap(int velocityY) {
 
     int maximumOffset = getMaxScrollY();
     int targetOffset = predictFinalScrollPosition(velocityY);
+    if (mDisableIntervalMomentum) {
+      targetOffset = getScrollY();
+    }
+
     int smallerOffset = 0;
     int largerOffset = maximumOffset;
     int firstOffset = 0;