StencilJS Component Bundle Interaction with Node/Express Server During Deployment

StencilJS compiles components into a Rollup bundle that must be served by a Node/Express runtime, yet deployment logs often truncate the details needed to diagnose failures.

The core uncertainty lies in how the compiler’s output maps to runtime expectations, especially regarding missing modules, polyfill loading, CSS extraction, and automatic service‑worker registration, all of which are not explicitly documented.

What specific log entries reveal a missing module or polyfill failure in the server stack trace? Does the Stencil compiler automatically register a service‑worker for PWA support, or must it be added manually? How can we confirm that CSS extraction succeeded when the build log reports a generic “Failed to load component stylesheet” message?