Istanbul Coverage Data

Collecting Istanbul Coverage Data

• Before coverage collection: Instrumenting source code with Istanbul
  • webpack with babel loader: babel-plugin-istanbul, see example: webpack.config-istanbul.js
  • CLI: nyc instrument or API: istanbul-lib-instrument
  • vite: vite-plugin-istanbul
  • rollup: rollup-plugin-istanbul
  • swc: swc-plugin-coverage-instrument

Browser Collection

• Collecting coverage data from window.__coverage__, example: test-istanbul.js

Node.js Collection

• Collecting coverage data from global.__coverage__

CDP Collection

• getIstanbulCoverage() see CDP Client API