S

src/RichTextEditor.js

   setEditorAvailableHeightBasedOnKeyboardHeight(keyboardHeight) {
     const {top = 0, bottom = 0} = this.props.contentInset;
     const {marginTop = 0, marginBottom = 0} = this.props.style;
+    const {heightToScreenTop = 0} = this.props;
     const spacing = marginTop + marginBottom + top + bottom;
 
-    const editorAvailableHeight = Dimensions.get('window').height - keyboardHeight - spacing;
+    const editorAvailableHeight = Dimensions.get('window').height - keyboardHeight - spacing - heightToScreenTop;
     this.setEditorHeight(editorAvailableHeight);
   }
 

src/editor.html

 			}
 
 			zss_editor.updateOffset = function() {
-
 				if (!zss_editor.updateScrollOffset)
 					return;
 
 				var futureEditorHeight = caretYPosition + lineHeight;
 				if (caretYPosition < offsetY) {
 					newPos = caretYPosition;
-				} else if (futureEditorHeight > editorHeight + offsetY) {
-					newPos = futureEditorHeight - editorHeight + halfLineHeight;
+				} else if (futureEditorHeight > parseInt(editorHeight) + offsetY) {
+					newPos = futureEditorHeight - parseInt(editorHeight) + halfLineHeight;
 				}
 
 				if (newPos) {