Hello TAG!

I'm requesting a TAG review of:

• Name: Storage - persistence and quota/usage estimation APIs
• Specification URL: https://storage.spec.whatwg.org
• Explainer, Requirements Doc, or Example code: MDN
• Primary contacts: @inexorabletash

You should also know that...

The Storage spec (authored by @annevk) attempts to define web platform storage architecture - the theoretical concepts underpinning various storage APIs like DOM Storage, Indexed DB, Service Worker's Cache, notifications, etc

It also defines two new APIs: a permission for making an origin's storage persistent (two promise-based methods to request and check the permission), and a means for an origin to get an estimate of its current usage and potential quota (a single promise-based method).

Parts of this (the persistent storage permission) have shipped in Chrome (since 55) and Opera (since 42). Chrome has an experimental implementation of the usage/quota estimation method. Firefox has experimental implementations of both parts.

(Relevant history: Chrome has previously shipped usage/quota estimation APIs based on early iterations (1, 2) of https://www.w3.org/TR/quota-api/ - but the current API as defined in that document was never shipped. Chrome also experimented with an earlier bifurcation between 'temporary' and 'persistent' storage, exposed on individual storage API entry points, but that was only ever implemented for the File System API that only Chrome ever shipped.)

We'd prefer the TAG provide feedback as (please select one):

• open issues in our Github repo for each point of feedback
• open a single issue in our Github repo for the entire review
• leave review feedback as a comment in this issue and @-notify [github usernames]