如今，在大多数网站上，我都看到这样的网址
http://example.com/style.css?v=024741259dd2
其中 style.css 附加了一些文本。这个附加文本是什么版本号或日期和时间？如果是，它是如何生成的？这有什么意义？
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it is probably a "random" number (e.g. a file checksum, or the SHA of a commit under a versioning system, or the resource timestamp in MD5 format, or...) generated automatically on server-side as a cachebusting technique. The purpose is to invalidate the browser cache for that resource if you've already loaded it and a change was made.
As example, I always use that technique while I am developing a website with Jekyll and Jekyll-assets, so I can be sure to always see my recent changes without reloading my javascript and stylesheets file from the cache.
于 2013-06-26T08:40:58.567 回答