Please implement StorageEstimate.usageDetails Explainer: https://jarryd999.github.io/quota-usage-details/ Spec PR: https://github.com/whatwg/storage/pull/69 Web Platform Tests (estimate-usage-details-*): https://github.com/web-platform-tests/wpt/tree/master/storage Chrome Feature Status: https://www.chromestatus.com/feature/5737131066523648
<rdar://problem/53034206>