title: How to prevent Android's back gesture from selecting text inside of nested webview?
body: <p>We have an app that uses a Webview to render a text editor (<code>contentEditable</code>) inside of a React Native application. This works well overall, except that the Android back gesture can lead to changes in the selection of text inside the Webview and similar strange behaviors.</p>
  <p>We've tried things like having an element along the screen edge that pops out to overlay the Webview when a user begins a back gesture, tried with both <code>onPress</code> and <code>onPressIn</code>.</p>
  <p>But by that time, it's already too late to <code>evt.preventDefault()</code> - and the text selection takes place even though the Webview is now covered by another element, I guess because it's technically still the same event that triggered the overlay. (Also tried <code>evt.stopPropagation</code> in desperation.)</p>
  <p>Is there any way to prevent text selection within our Webview when a user uses the back gesture?</p>