All Skills > Feature Setup > Span Streaming (JavaScript)

Sentry Span Streaming Migration (JavaScript)

Migrate from the default transaction-based trace lifecycle (static) to span streaming (stream), where spans are sent individually as they complete instead of being batched into a transaction at the end.

This skill covers the JavaScript SDK (Browser, Node.js, Bun, Deno, Cloudflare). For Python, see Span Streaming (Python).

Invoke This Skill When

• User asks to "enable span streaming" or "migrate to span streaming" in a JavaScript project
• User wants to switch from transaction-based to streamed span delivery
• User mentions traceLifecycle, spanStreamingIntegration, or withStreamedSpan
• User wants lower latency span delivery or per-span processing

Phase 1: Detect