问中的函数中丢失状态变量值的原因

EN

import React from 'react';

export default function App() {

function dummy(){
    return (<div>USERID von dummy: {USERID}</div>);
  }

  const [USERID, setUSERID] = React.useState(9);

  return (
    <View style={styles.container}>
      <h1>REACT - AXIOS</h1>
      <StatusBar style="auto" />
      <table>
        <tr>
          UserID: <TextField onChange={text => setUSERID(parseInt(text))} variant="outlined" name="userid" label="userid" id="userid" />
        </tr>
        <tr>
          <td>
            {dummy()}
          </td>
        </tr>
        <tr style={{ marginTop: 30 }} >
          <td> </td>
        </tr>
      </table>
    </View>
  );
}