OptionalattributionAdds a diagnostic breakdown to each metric, such as the LCP element or the interaction that
caused INP. Loads the larger web-vitals/attribution build on demand. Defaults to false.
Maximum number of metric reports to retain.
Whether to report metric updates as values change. Defaults to true.
OptionalsoftReports metrics separately for each soft navigation (an interaction that changes the URL and
paints), in browsers that detect them (Chromium 151+). The latest value of each metric then
belongs to the newest navigation; earlier ones stay in entries. Defaults to false.
Configuration for the Web Vitals collector.