The API changes are due to enabling strict checks in TypeScript (via `strict: true`). The payload size changes in `polyfills.js` are due to more browser APIs being patched in recent versions (e.g. `fetch`, `customElement v1`). PR Close #28219
@stable
These are no longer needed as stable docs are computed as those that do not have `@experimental` or `@deprecated` tags. PR Close #23210
PR Close #23108