react bootstrap hide toggle menu when scrolling down

To hide the toggle menu in React Bootstrap when scrolling down, you can use the useState and useEffect hooks in combination with CSS. Here's an example of how you can achieve this:

import React, { useState, useEffect } from 'react';
import { Navbar } from 'react-bootstrap';

const App = () => {
  const [isNavVisible, setIsNavVisible] = useState(true);
  const [prevScrollPos, setPrevScrollPos] = useState(0);

  useEffect(() => {
    const handleScroll = () => {
      const currentScrollPos = window.pageYOffset;

      setIsNavVisible((prevScrollPos > currentScrollPos && prevScrollPos - currentScrollPos > 70) || currentScrollPos < 10);
      setPrevScrollPos(currentScrollPos);
    };

    window.addEventListener('scroll', handleScroll);

    return () => {
      window.removeEventListener('scroll', handleScroll);
    };
  }, [prevScrollPos]);

  return (
    <Navbar className={isNavVisible ? 'navbar-show' : 'navbar-hide'}>
      {/ Your menu items /}
    </Navbar>
  );
};

export default App;

In this example, we use the useState hook to manage the visibility of the navbar (isNavVisible) and the previous scroll position (prevScrollPos). The useEffect hook is used to add a scroll event listener and update the navbar's visibility based on the scroll direction and position.

The CSS classes navbar-show and navbar-hide can be defined in your CSS file to control the visibility of the navbar. For example:

.navbar-hide {
  transform: translateY(-100%);
  transition: transform 0.3s ease-in-out;
}

.navbar-show {
  transform: translateY(0);
  transition: transform 0.3s ease-in-out;
}

By default, the navbar is visible (isNavVisible is set to true). When the user scrolls down, the navbar will hide (isNavVisible is set to false). When the user scrolls up, the navbar will show again.

Remember to replace Navbar with the appropriate Bootstrap component you are using for your menu.