Relevant laws, regulations, and compliance requirements

In front-end development, security compliance is a core aspect of ensuring user data protection and business stability. With the refinement of data protection regulations, developers must strictly adhere to relevant laws and technical standards, mitigating risks at the code level.

Data Privacy Protection Regulations

GDPR (General Data Protection Regulation)

The EU's General Data Protection Regulation requires explicit user consent for data collection. Front-end implementations must include:

1. Clear consent pop-ups before collecting user data
2. Interfaces for data access/deletion requests

// GDPR-compliant Cookie Consent Component
class CookieConsent extends React.Component {
  state = { showModal: true };

  handleAccept = () => {
    setAnalyticsCookies(true);
    this.setState({ showModal: false });
  };

  render() {
    return this.state.showModal && (
      <div className="gdpr-modal">
        <p>We use cookies to enhance your experience</p>
        <button onClick={this.handleAccept}>Accept</button>
        <button onClick={this.handleReject}>Reject</button>
      </div>
    );
  }
}

CCPA (California Consumer Privacy Act)

California's regulation mandates:

• A "Do Not Sell My Personal Information" link
• 45-day response window for data requests

<!-- CCPA-compliant element -->
<footer>
  <a href="/ccpa-request" id="ccpa-link">
    Do Not Sell My Personal Information
  </a>
</footer>

Secure Transmission Standards

HTTPS Enforcement

Per PCI DSS standards:

1. All form submissions must use TLS 1.2+
2. Automatic mixed content upgrades

# Nginx HTTPS enforcement
server {
  listen 80;
  server_name example.com;
  return 301 https://$host$request_uri;
}

CSP (Content Security Policy)

XSS defense compliance requirement:

Content-Security-Policy: 
  default-src 'self';
  script-src 'self' https://trusted.cdn.com;
  style-src 'self' 'unsafe-inline';
  img-src * data:;

User Input Handling Standards

OWASP Top 10 Compliance

1. Sanitize all user input
2. Output encoding to prevent XSS

// Input sanitization example
function sanitizeInput(input) {
  return input
    .replace(/</g, '&lt;')
    .replace(/>/g, '&gt;')
    .replace(/'/g, '&#39;');
}

// React auto-escaping example
function UserProfile({ bio }) {
  return <div>{bio}</div>; // JSX auto-escapes HTML
}

Password Storage Standards

Per NIST SP 800-63B:

// Front-end password strength validation
function validatePassword(pwd) {
  const minLength = 12;
  const hasUpper = /[A-Z]/.test(pwd);
  const hasNumber = /\d/.test(pwd);
  return pwd.length >= minLength && hasUpper && hasNumber;
}

Auditing and Logging

Data Access Logs

ISO 27001-compliant critical operation logging:

// Critical operation logging
function logDataAccess(userId, action) {
  fetch('/api/audit-log', {
    method: 'POST',
    body: JSON.stringify({
      timestamp: new Date().toISOString(),
      user: userId,
      action: action,
      ip: getClientIP()
    })
  });
}

Third-Party Service Compliance

SDK usage verification:

// Compliant Google Analytics loading
if (userConsent.given) {
  window.dataLayer = window.dataLayer || [];
  function gtag(){ dataLayer.push(arguments); }
  gtag('js', new Date());
  gtag('config', 'GA_MEASUREMENT_ID', { 
    anonymize_ip: true,
    cookie_expires: 3600 
  });
}

Cross-Origin Resource Sharing (CORS)

Secure Header Configuration

Per OWASP security standards:

Access-Control-Allow-Origin: https://trusted.domain.com
Access-Control-Allow-Methods: GET, POST
Access-Control-Allow-Headers: Content-Type
Access-Control-Max-Age: 86400

Preflight Request Handling

// Express middleware example
app.use((req, res, next) => {
  res.header('Access-Control-Allow-Origin', ALLOWED_ORIGINS);
  res.header('Access-Control-Allow-Credentials', 'true');
  if (req.method === 'OPTIONS') {
    res.header('Access-Control-Allow-Methods', 'GET,PUT,POST,DELETE');
    return res.status(204).json({});
  }
  next();
});

Vulnerability Disclosure Policy

Security Response Headers

Compliance-mandated protections:

X-Content-Type-Options: nosniff
X-Frame-Options: DENY
X-XSS-Protection: 1; mode=block
Referrer-Policy: strict-origin-when-cross-origin

Vulnerability Reporting Channel

<!-- Add reporting link in footer -->
<footer>
  <a href="mailto:security@example.com">Report Security Issues</a>
</footer>

Continuous Compliance Monitoring

Automated Security Checks

CI/CD pipeline integration:

# GitHub Actions example
name: Security Scan
on: [push]
jobs:
  audit:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v2
      - run: npm audit
      - run: npx eslint --plugin security

Dependency Compliance Review

# License compliance check
npx license-checker --summary --failOn GPL