At its core, TW works by violating a prime rule of Javascript: It
saves itself (and other material) to a local machine.
[...]
So I'm wondering if we're going to wake up one day to [browsers]
that no longer [allow] TW to save. Nor alternatives via java?
While that possibility exists, it seems highly unlikely. Browser
vendors, while security-conscious, are very keen on not breaking
compatibility with existing websites or applications.
It's worth noting that TiddlyWiki will always be readable, so you will
not lose access to your data.
Is there some browser that we can count on to always run TW?
Site-specific browsers like Prism, perhaps.
Will the new HTML5 basis guarantee that TW will always have a
legitimate way to save itself?
While HTML5 provides local storage, that is currently is limited to a
database within the respective user's individual browser - so it's not
very portable.
However, there are efforts to provide a sanctioned mechanism for
file-system access:
http://www.w3.org/News/2010.html#entry-8762
Too bad they don't have a portable web-server app. That might
future-proof TW.
Indeed, that would always remain an option.
TiddlyWeb already provides this - it's just that we don't have a
one-click install for Windows yet:
http://tiddlyweb.peermore.com/wiki/recipes/docs/tiddlers/Installing%20on%20Windows
We're hoping that someone with an interest in that particular OS will
contribute to simplify the experience (should not be hard at all).
Now, I believe that it would be really cool if TW became implemented
using only HTML 5, no Javascript. I saw somewhere a online drawing
app, which is totally HTML 5 based.
HTML5 and JavaScript are not mutually exclusive - quite the opposite.
Anything highly dynamic or interactive - including canvas, which you
seem to be alluding to - is driven by JavaScript.
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