The storage limitation
Extracted from the official documentation provided by the W3C:
Web Storage: Editor's Draft 10 July 2012 - disk space:
User agents should limit the total amount of space allowed for storage areas.
A mostly arbitrary limit of five megabytes per origin is recommended. Implementation feedback is welcome and will be used to update this suggestion in the future.
Is safe to assume that developers follow the recommendations and in fact there's a limit (five megabytes). Do beware that everything is in flux, but I don't think this limit will change drastically.
Additionally, you can access http://html5test.com/ and check your browser's support.
As a personal note:
I'm a programmer and I've developed some APPs for iOS and Android, that go over the 5MB limitation. All is working well, and had no complains from the client or the APP users.
My recommendation: Try to respect the limit if possible, but I believe that those 5MB will soon be expanded.
Check this article that provides some tests on the Offline Storage Limits.Posted on February 24, 2011 by Garth
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