PageSpy is Huolala’s open‑source front‑end remote debugging suite, comprising three repositories for the web UI, server API, and client SDK, with plugin‑based interception of console, network, storage, and other browser APIs, plus a WebSocket‑driven debugging client and strong data‑security guarantees.
The vivo Internet Big Data team presents a standardized, extensible H5 tracking solution that automates data collection via a JavaScript SDK for navigation, focus/blur, and visibility events, incorporates privacy safeguards, and feeds a multi‑layer data‑warehouse architecture with unified ID mapping and bitmap‑based retention modeling to support comprehensive user‑behavior dashboards and future advanced analyses.
This article explains why front‑end engineers need monitoring, outlines the key metrics to collect, and walks through the design and implementation of a JavaScript SDK that captures page views, API calls, resources, errors, performance, and custom events, sending logs to an ELK stack with batching and beacon fallback.
