// Header.js import React from 'react'; const Header = () => { return ( <header> <h1>Welcome to My App</h1> <nav> <ul> <li><a href="/">Home</a></li> <li><a href="/docal">DOCAL</a></li> <li><a href="/showresult">SHOWRESULT</a></li> </ul> </nav> </header> ); } export default Header;