How to swipe left of screen to go back in webview on andriod( I figured it out)

[mlafortune1223]

Here is my code

    <GestureHandlerRootView
      gesture={tap}
      style={{flex:1}}
      onSwipeLeft={() => onSwipeLeft()}
      >
      <Pressable
                style={{
                  float:'right',
                  top:'95%',
                  left:10,
                  height:24,
                  width:24,
                  zIndex:100
                }}>
      <AntDesign 
      name="left" size={24} color="black" onPress={goBack}/>
      </Pressable>
      <GestureDetector gesture={tap} >
    <WebView
    style={{
      marginTop:20,//it starts scrolled down so the top of the page is white, but the view can bleed into the unaccesable top bar, so this balances that out
    }}
    allowsBackForwardNavigationGestures={true}
      ref={webViewRef}
      applicationNameForUserAgent='FCMobileApp'
      source={{ uri: WEBVIEW_URL }}
      onMessage={event => console.log(event)}
      javaScriptEnabled={true}
      startInLoadingState={true}
      renderLoading={() => (
        <ActivityIndicator color="black" size="large" />
      )}
    />
    </GestureDetector>
    </GestureHandlerRootView>

);
}

I am wondering what event and event listener I should use to add a "Swipe left to go back" feature inside the webview. It picks up on all events, but it's really not clear which event is just someone swiping from the left of the screen. I've tried reading tap, and longpress, but I haven't managed to figure anything out. Please help

[mlafortune1223]

It was this. Please ignore

const panHandler = Gesture.Pan().onEnd((event) => {
if (event.absoluteX - event.translationX < 60 && event.translationX > 90) goBack()
});