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According to the source, the JS and CSS files I'm loading are:


Just wondering how those "v" parameters are generated. On my websites I generally just use an integer which I manually increment, so I'm curious if these are generated automatically somehow.

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Don't know, but they're probably hashed for build updates. – Nightfirecat Nov 15 '11 at 7:11
up vote 8 down vote accepted


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Followup question - how do you insert the SHA1 prefix into (presumably) the ASP.NET MVC app? – Jon Nov 15 '11 at 8:30
@Jon: The app has access to a local copy of the file (even if it's eventually served from the CDN), so it can just read the file once at startup, build the checksum, and then cache it. – balpha Nov 15 '11 at 8:50

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