Can I use javascript urls in react16.9?

 In React 16.9, `javascript:` URLs would log a warning in the console because URLs starting with `javascript:` are dangerous security vulnerabilities (XSS attacks).

     const companyProfile = {
       website: "javascript: alert('Your website is hacked')",
     };
     // This logged a warning in React 16.9
     // Now blocked or throws error in modern React
     <a href={companyProfile.website}>More details</a>;

 **Modern Best Practice:**
 - Never use `javascript:` URLs
 - Use proper event handlers instead:
 

     const handleClick = (e) => {
       e.preventDefault();
       // Your logic here
     };
     
     <a href="#" onClick={handleClick}>More details</a>
     // Or better:
     <button onClick={handleClick}>More details</button>