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testing.orkobd
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orkobd
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Editing: index.js
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import React, { useState } from 'react'; import ReactDOM from 'react-dom/client'; import App from './App'; const root = ReactDOM.createRoot(document.getElementById('root')); function RootApp() { const [scrollTop, setScrollTop] = useState(0); function scrollHandler(event) { // console.log('scrollHandler'); // console.log('scrollTop: ', event.currentTarget.scrollTop); // console.log('offsetHeight: ', event.currentTarget.offsetHeight); setScrollTop(event.currentTarget.scrollTop); } return ( <div style={{height: '100vh', overflow: 'auto'}} onScroll={scrollHandler}> <App scrollTop={scrollTop} /> </div> ); } root.render( <React.StrictMode> <RootApp /> </React.StrictMode> );
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