Reactjs: useCallback and React.memo fun - code - 3

ok.js

let _int_val1 = 0;
const IntValComp1 = ({initFunc}) => {
  const [value, setValue] = React.useState(-1);
  console.log('IntValComp1');
 
  React.useEffect(
    () => {
      const val = _int_val1++;
      if (_int_val1 >= 100000) _int_val1 = 0;
 
      setValue(val);
      initFunc(val);
    },
    [initFunc],
  );
 
  return <div>{`int value one: ${value}`}</div>;
};
 
const ParentComp = () => {
  const [intVal1, setIntVal1] = React.useState();
  const updateValue1 = React.useCallback((v) => setIntVal1(v), []);
  return (
    <div>
      <IntValComp1 initFunc={updateValue1} />
    </div>
  );
};