What is Server-Side Rendering?
Server-side rendering (SSR) generates a page’s initial HTML on the server and sends it to the browser. Client-side JavaScript may subsequently hydrate that HTML to provide interactive behavior.
How Server-Side Rendering works
SSR executes component rendering on a server for each request or from a server-side cache, producing an HTML representation that can be displayed before the application bundle runs. Hydration then attaches client logic to matching markup when interactivity is needed. This differs from static generation, which creates HTML ahead of requests, and from purely client-rendered pages that begin with a minimal shell. SSR sits in the web delivery path and can combine request context, backend data, and routing before response.
Key facts
- 1Hydration expects the client’s initial tree to match the server markup; locale, time, randomness, or browser-only branches can cause mismatches and discarded work.
- 2Server rendering can improve first-content availability, but slow backend data or uncached computation increases time to first byte unless work is streamed or cached.
- 3Code executed during SSR has no browser DOM, so modules that access window or document during import or render must be isolated behind a client boundary.
When Server-Side Rendering matters
Use SSR when initial content, link previews, search discovery, or resilience without JavaScript matters. It adds server rendering work and can cause hydration errors if browser output differs from the server HTML.
Common use cases for platform workflows
These examples cover platform workflows broadly, not specifically Server-Side Rendering.
- Running repeatable upload, import, processing, AI, storage, and notification pipelines.
- Tracking long-running media work independently from an application request.
- Referencing centrally stored credentials by name instead of sending storage secrets with each request.
Working with platform workflows
This guidance covers platform workflows broadly, not just Server-Side Rendering.
A client authenticates and submits files or references together with workflow instructions. The platform validates the request, schedules dependent operations, records state transitions, and exposes results through a response, polling endpoint, or notification.
Platform concepts become reliable only when their lifecycle is explicit. Authentication, idempotency, retries, timeouts, observability, quotas, and terminal states should be designed together rather than added after failures occur.
What you gain
- Reusable workflows separate application intent from processing infrastructure.
- Stable job identifiers and lifecycle events improve observability and recovery.
- Managed queues and workers let products scale without embedding every media tool.
What it costs
- Synchronous responses are simple but keep connections open while long work executes.
- Aggressive retries improve recovery from transient faults but can duplicate work or overload a dependency.
- Higher concurrency reduces queue time until resource contention or a downstream limit becomes the bottleneck.
Before production
- 1Define authentication, authorization, idempotency, retries, and terminal error behavior.
- 2Observe queue time, execution time, callbacks, and partial results with stable identifiers.
- 3Exercise malformed, duplicate, interrupted, and unauthorized requests before launch.