@tracelane/report

The reporter for your WebdriverIO tests — Playwright and Cypress on the roadmap. Self-contained HTML for every run — replay failures, audit successes, attach to any bug tracker. No SaaS, no dashboard, no signup.

The self-contained, offline HTML report builder for tracelane. Given a captured rrweb event stream plus test metadata, it produces a single .html file that:

• opens in any browser, fully offline (no network fetch at view time);
• embeds the rrweb-player UMD + CSS inline;
• embeds the events as a gzipped, base64-encoded blob that is decompressed in-page with an inlined fflate gunzip;
• renders console + network panels, a metadata header, and a "Copy as Markdown for AI paste" button.

Not generally intended for direct consumption — depend on a product package (@tracelane/wdio) instead. See the @tracelane/wdio README for the integration guide.

Usage

import { buildReport } from '@tracelane/report';

const html = buildReport(events, {
  spec: 'login.spec.ts',
  title: 'logs in with valid credentials',
  status: 'failed',
  error: 'expected element to be visible',
  durationMs: 4210,
  browserName: 'chrome',
  browserVersion: '124.0',
  viewport: { width: 1280, height: 720 },
  // commitSha / buildUrl auto-detected from CI env when omitted
});
// write `html` to ./tracelane-reports/<spec>--<title>.html

Design

• Player: [email protected] (upstream). @posthog/rrweb-player was the natural lineage match for the @cubenest/rrweb-core substrate fork, but every published version pins an unpublished dependency (@posthog/[email protected], 404) and is therefore uninstallable. Upstream rrweb-player descends from the same rrweb 2.x line (2.0.0-alpha.x) that the substrate's @posthog/[email protected] was forked from (2.0.0-alpha.17), so the recorded event shape replays correctly.
• Decompression: the build side uses @cubenest/rrweb-core's compress() (fflate gzip); the view side inlines fflate's browser gunzipSync for a small (~8 KB) offline decompressor.
• Asset inlining: the player UMD/CSS and the fflate gunzip source are read from node_modules at build time (fs.readFileSync) — never hand-pasted into source.

License

Apache 2.0. The inlined rrweb player and fflate remain MIT-licensed; see NOTICE.