A single-page application (SPA) is a type of web application that loads a single HTML page and updates its content dynamically as the user interacts with it, without requiring full page reloads. SPAs rely heavily on JavaScript, APIs, and the browser’s DOM to deliver app-like experiences. Frameworks like React, Vue, and Angular are commonly used to build SPAs.
Why it matters
SPAs provide smoother navigation and faster interactions by reducing unnecessary network requests and page reloads. However, they also introduce challenges in SEO, initial load performance, and state management.
Examples
Web apps like dashboards, email clients, or project management tools often use an SPA architecture. Lessons like Single-Page vs Multi-Page Applications compare SPA and MPA tradeoffs.