Web Development Intermediate

What is SPA (Single Page Application)?

A web application that loads a single HTML page and dynamically updates content without full page reloads.

SPAs load once and use JavaScript to render content dynamically. Navigation happens client-side using the History API, creating a smooth, app-like experience without page refreshes. Data is fetched via AJAX/fetch API calls.

Popular SPA frameworks include React, Vue.js, and Angular. Challenges include SEO (solved by SSR/SSG), initial load time (code splitting), and browser history management. SPAs communicate with backends via REST or GraphQL APIs.

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Related Terms

A property where performing an operation multiple times produces the same result as performing it once.

An HTML element that tells search engines which URL is the preferred version of a page when duplicate or similar content exists at multiple URLs.

Storing copies of frequently accessed data in faster storage to reduce load times and server processing.

A technique that delays loading non-critical resources until they are needed, improving initial page load performance.

Content Negotiation

An HTTP mechanism where client and server agree on the best representation of a resource based on format, language, or encoding preferences.

HTTP headers that control cross-origin resource sharing between different domains, specifying allowed origins, methods, and headers.

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