emulation library Null safety
- This domain emulates different environments for the page.
- Screen orientation.
- Used to specify User Agent Cient Hints to emulate. See https://wicg.github.io/ua-client-hints
- Used to specify User Agent Cient Hints to emulate. See https://wicg.github.io/ua-client-hints Missing optional values will be filled in by the target with what it would normally use.
- Enum of image types that can be disabled.
- advance: If the scheduler runs out of immediate work, the virtual time base may fast forward to allow the next delayed task (if any) to run; pause: The virtual time base may not advance; pauseIfNetworkFetchesPending: The virtual time base may not advance if there are any pending resource fetches.