Server Side Rendering Ssr Interview Questions

Server-Side Rendering (SSR) generates HTML on the server instead of client. Provides better initial page load, SEO benefits. SvelteKit handles SSR automatically with hydration on client-side.

Hydration is the process where client-side JavaScript takes over server-rendered HTML. Makes static content interactive. Preserves server-rendered state. Happens automatically in SvelteKit.

Server-side data loading uses load functions in +page.server.js. Returns data for page rendering. Supports async operations. Data available during SSR and hydration.

Client-Side Rendering (CSR) fallback handles cases where SSR fails or is disabled. Uses +page.js instead of +page.server.js. Provides graceful degradation.

Disable SSR using export const ssr = false in +page.js. Page renders only on client. Useful for browser-specific functionality. Impacts initial page load.

Server-only modules run exclusively on server. Use .server.js extension. Cannot be imported by client code. Useful for sensitive operations like database access.

SSR errors handled by error.svelte pages. Support error boundaries. Can provide fallback content. Error details available through error prop.

Streaming SSR sends HTML in chunks as it's generated. Improves Time To First Byte (TTFB). Supports progressive rendering. Available through Response.body.

Environment variables accessed through $env/static/private or $env/dynamic/private. Only available server-side. Must prefix with VITE_ for client access.

Prerendering generates static HTML at build time. Uses export const prerender = true. Improves performance. Suitable for static content.

SSR data fetching uses load functions. Handle async operations. Support caching strategies. Implement error handling. Manage data dependencies.

SSR caching implements cache strategies. Handle cache invalidation. Support cache headers. Implement cache storage. Manage cache lifecycle.

SSR optimization includes code splitting, caching, streaming. Handle resource optimization. Support performance monitoring. Implement optimization strategies.

SSR session state manages user sessions. Handle session storage. Support session persistence. Implement session security. Manage session lifecycle.

SSR middleware processes server requests. Handle request transformation. Support middleware chain. Implement middleware patterns. Manage middleware order.

SSR authentication manages user auth state. Handle auth flows. Support session management. Implement auth strategies. Manage auth security.

SSR routing handles server-side navigation. Handle route matching. Support dynamic routes. Implement routing strategies. Manage route state.

SSR headers manage HTTP headers. Handle cache control. Support content types. Implement header strategies. Manage header security.

SSR forms handle form submissions server-side. Handle form validation. Support file uploads. Implement CSRF protection. Manage form state.

Advanced patterns include streaming, progressive enhancement. Handle complex scenarios. Support pattern composition. Implement advanced strategies.

SSR testing verifies server rendering. Handle test isolation. Support integration testing. Implement test utilities. Manage test coverage.

SSR monitoring tracks server performance. Handle metrics collection. Support debugging tools. Implement monitoring strategies.

SSR security prevents vulnerabilities. Handle input sanitization. Support security headers. Implement security measures. Manage security policies.

SSR error handling manages server errors. Handle error recovery. Support error boundaries. Implement error logging. Manage error state.

Optimization strategies improve SSR performance. Handle resource optimization. Support caching strategies. Implement performance metrics.

State management handles server state. Handle state serialization. Support state hydration. Implement state patterns.

SSR documentation describes server features. Generate documentation automatically. Support example usage. Manage documentation updates.

SSR debugging tracks server issues. Handle debugging tools. Support state inspection. Implement debug logging.

SSR internationalization handles multiple languages. Support content translation. Implement i18n patterns. Manage translations.

SSR accessibility ensures server-rendered content is accessible. Handle ARIA attributes. Support screen readers. Implement a11y patterns.