shorthand http:// as // for script and link tags? anyone see / use this before?

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Starting a URL with // means “Use a different server but keep the same scheme”

So if you load //example.net/script from https://example.com/ it will get https://example.net/script, while if you load it from http://example.com/ it will get http://example.net/script.

If, on the other hand, you load it from file://c:/Users/You/Documents/test.html then it will probably not resolve to anything useful. Make sure you do development with a local web server (and access http://localhost/) if you use this syntax.

This is a standard part of URIs, it well supported, and is usually known as “scheme relative URIs”

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