Fix caretRangeFromPoint for Firefox (#6598)

WordPress · May 5, 2018 · fb13235 · fb13235
1 parent c37a222
commit fb13235
Showing 1 changed file with 7 additions and 0 deletions.
diff --git a/utils/dom.js b/utils/dom.js
@@ -251,6 +251,13 @@ function caretRangeFromPoint( doc, x, y ) {
 	}
 
 	const point = doc.caretPositionFromPoint( x, y );
+
+	// If x or y are negative, outside viewport, or there is no text entry node.
+	// https://developer.mozilla.org/en-US/docs/Web/API/Document/caretRangeFromPoint
+	if ( ! point ) {
+		return null;
+	}
+
 	const range = doc.createRange();
 
 	range.setStart( point.offsetNode, point.offset );