micro-frontends

Composing one web UI from independently built and deployed frontends owned by separate teams. Covers the integration techniques (build-time, server-side, client-side runtime — iframes, web components, Module Federation, import maps), routing and orchestration (single-spa, app shell), cross-app communication, and the when-to-use tradeoffs. Use when splitting a frontend across teams, choosing between Module Federation / single-spa / server-side composition, integrating fragments from multiple apps, or migrating a frontend monolith incrementally.