How can I implement security headers in my Next.js application?

How can I implement security headers in my Next.js application?

You can implement security headers in Next.js by using the next.config.js file. You can set headers in the async headers() function.

What are some important security headers I should include?

Important security headers include Content Security Policy (CSP), X-Content-Type-Options, X-Frame-Options, and Strict-Transport-Security.

Can you give me an example of how to set these headers?

Sure! Here's an example:

module.exports = {
  async headers() {
    return [
      {
        source: '/(.*)',
        headers: [
          {
            key: 'Content-Security-Policy',
            value: "default-src 'self';"
          },
          {
            key: 'X-Content-Type-Options',
            value: 'nosniff'
          },
          {
            key: 'X-Frame-Options',
            value: 'DENY'
          },
          {
            key: 'Strict-Transport-Security',
            value: 'max-age=63072000; includeSubDomains'
          }
        ],
      },
    ];
  },
};

Is there a way to test if my security headers are working?

Yes, you can use online tools like SecurityHeaders.com or browser developer tools to check if your headers are set correctly.