Nested in a ScrollView

A form, a note, a snippet in a list: sometimes the editor sits in a page that scrolls and must not scroll on its own. Two props and one event do it.

import { useState } from 'react';
import { ScrollView, TextInput } from 'react-native';
import { CodeEditor } from 'react-native-codepad';

export function NotePage() {
  const [height, setHeight] = useState(120);
  return (
    <ScrollView keyboardShouldPersistTaps="handled">
      <TextInput placeholder="Title" />
      <CodeEditor
        style={{ height }}
        language="markdown"
        softWrap
        scrollEnabled={false}
        onContentSizeChange={(e) => setHeight(Math.ceil(e.height))}
      />
      <TextInput placeholder="Tags" />
    </ScrollView>
  );
}

• scrollEnabled={false} means the view never claims touch scrolling, so a drag over it scrolls the page. Taps, long presses and handle drags still work.
• softWrap keeps the content within the page width.
• onContentSizeChange reports the size at which nothing scrolls, insets included. Feed its height back into style. With soft wrap a tall document converges over a few frames as lines are measured, and Math.ceil avoids a one pixel scroll.
• keyboardShouldPersistTaps="handled" lets a tap place the caret without the page dismissing the keyboard first.

Caret reveal is yours

The editor cannot scroll the page. In onSelectionChange, read getCursorRect() (view coordinates, in dp), add the editor's offset in the page from its onLayout, and scroll the page when the caret leaves the visible band:

onSelectionChange={() => {
  const rect = editor.current?.getCursorRect();
  if (!rect) return;
  const y = editorTop + rect.y;
  if (y < pageScrollY || y + rect.height > pageScrollY + pageHeight) {
    page.current?.scrollTo({ y: y - pageHeight / 2, animated: true });
  }
}}

Leave avoidKeyboard off here: an editor that does not scroll has nothing to inset. Let the page handle the keyboard with a KeyboardAvoidingView or keyboard-controller's KeyboardAwareScrollView.

Keep nested documents small

An auto height editor lays out and draws every line. A few hundred lines is fine, a 10k line file belongs in a scrolling editor with a fixed height.