[Web Development] Server-side rendering (SSR) → Emergence of Ajax and spread of SPA → Virtual DOM (React) → PWA
Server-side rendering (SSR): before 2000, all content was generated on the server and sent to the client; advent of Ajax and spread of SPA: from the early 2000s to around 2010, technology to update only part of the page through asynchronous communication using Ajax became popular and and SPA (Single Page Application) appeared.