Can I use javascript urls in react16.9?

⚠️ DEPRECATED: As of React 19, javascript: URLs are no longer supported and may throw errors.

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>
     

## Disclaimer

The questions provided in this repository are the summary of frequently asked questions across numerous companies. We cannot guarantee that these questions will actually be asked during your interview process, nor should you focus on memorizing all of them. The primary purpose is for you to get a sense of what some companies might ask — do not get discouraged if you don't know the answer to all of them ⁠— that is ok!

Good luck with your interview 😊

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