An SPA is a web application that loads once and dynamically updates content without refreshing the page, providing a smooth, app-like experience.
Why It Matters
SPAs feel faster and more responsive than traditional websites because they don't wait for full page reloads—critical for applications where speed equals conversion.
When to Use This
- Dashboards with real-time data updates
- Social applications with live feeds
- Productivity tools (like Trello or Notion)
- Mobile-first web applications
Examples
- Gmail loading emails without page refresh
- Trello board updating cards in real-time
- Dashboard charts that update when data changes