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Enterprise Frontend Checklist

A comprehensive checklist for building and maintaining modern enterprise-grade frontend applications, with focus on security, accessibility, performance, maintainability, AI integration, and sustainability. This enhanced checklist covers traditional frontend concerns while embracing emerging technologies and practices.

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Security

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  • Implementation Questions:
    • Are all HTTP requests automatically redirected to HTTPS with 301 status codes?
    • Is HSTS (HTTP Strict Transport Security) header configured with max-age and includeSubDomains?
    • Are TLS certificates properly configured with strong cipher suites and modern protocols?
    • Is certificate auto-renewal implemented to prevent expiration issues?
    • Are development and staging environments also enforcing HTTPS?
    • Is the application checking for mixed content warnings in browser console?
    Key Considerations:
    • Configure proper certificate pinning for enhanced security against certificate authority compromises
    • Implement OCSP stapling to improve SSL handshake performance and security validation
    • Use security headers like Strict-Transport-Security with appropriate max-age values
    • Test SSL configuration regularly using tools like SSL Labs or similar security scanners
    Red Flags:
    • HTTP endpoints still accessible without automatic HTTPS redirection
    • Mixed content errors appearing in browser console (HTTP resources on HTTPS pages)
    • Weak or outdated TLS versions (below TLS 1.2) still enabled
    • Certificate expiration warnings or self-signed certificates in production environments
  • Implementation Questions:
    • Is Content Security Policy header present on all HTML responses with appropriate directives?
    • Are script-src and style-src directives properly configured to prevent inline code execution?
    • Is CSP configured in enforcement mode rather than report-only for production?
    • Are nonce or hash values being used for legitimate inline scripts and styles?
    • Is unsafe-eval and unsafe-inline avoided in CSP directives?
    • Are CSP violation reports being collected and monitored for policy effectiveness?
    Key Considerations:
    • Start with report-only mode to identify legitimate violations before enforcing
    • Use specific domain allowlists rather than wildcard (*) directives
    • Implement proper nonce generation for dynamic content and third-party integrations
    • Regular review and updates of CSP policies as application features evolve
    Red Flags:
    • Missing CSP headers entirely or overly permissive policies with unsafe-inline/unsafe-eval
    • CSP violations appearing frequently in monitoring without investigation
    • Third-party scripts loading without proper CSP whitelisting
    • Development environments bypassing CSP leading to production deployment issues

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Accessibility

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Performance

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Design & UX

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Scalability

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Monitoring

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Privacy

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Team & Process

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DevOps & Infrastructure

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Modern Architecture

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AI/ML Integration

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Developer Experience

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Sustainability

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Cost Management

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Vendor Management

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Technical Debt

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Innovation Pipeline

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Crisis Management

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