Why use sessionStorage over localStorage

[TxHawks]

Is there a reason to use sessionStorage over localStorage to optimize for repeat visits? My understanding is that using sessionStorage only optimizes for repeat visits within the same window (so not even new tab), while localStorage could also for repeat visits after the window is closed or a new tab is opened.

Am I missing something?

[zachleat]

It’s mostly a personal preference based on cache invalidation assumptions. We’re using this flag as a loose approximation of having the font files in cache. It’s all in how you’d like it to fail, when it does.

• sessionStorage will request more often than it needs but is unlikely to fail with a false positive
• localStorage will request less often but is more likely to false positive (thinks it’s in cache when it isn’t)

[zachleat]

Of course this could be improved with serviceworker, too 👍