HeadlessExperimental.mainFrameReadyForScreenshots

Issued when the main frame has first submitted a frame to the browser. May only be fired while a BeginFrame is in flight. Before this event, screenshotting requests may fail.

{
  "name": "mainFrameReadyForScreenshots",
  "description": "Issued when the main frame has first submitted a frame to the browser. May only be fired while a BeginFrame is in flight. Before this event, screenshotting requests may fail."
}