I am working on trying to run TypeScript on the front_end/lighthouse files in DevTools, but I am running into several problems. Most prominently, LightHouse puts several types on the global scope, such as ReportRenderer and ReportUIFeatures (see the declarations in https://source.chromium.org/chromium/chromium/src/+/master:third_party/devtools-frontend/src/front_end/lighthouse/LighthouseReporterTypes.js;l=28-30;drc=1e10f8546c3cd94438e2046711e302a9dc771394)

To make consumption easier for DevTools and potentially improve tree-shaking and all, could we consider changing the way LightHouse exports symbols to use ES exports instead? E.g. rather than putting symbols on the global scope, make them export class definitions that DevTools can then import. This should be possible, now that LightHouse is bundled and several other infrastructure improvements have been made on the DevTools side.