Are there situations where omitting the protocol in http:// or https:// will fail to work in certain browsers? [duplicate]

This question already has answers here: 开发者_开发技巧 Closed 11 years ago.

Possible Duplicate:

Can I change all my links to just //?

I.e. if I do: //www.google.com it would point to http://www.google.com or https://www.google.com depending on what the current protocol is. Are there browsers that is reasonable to support where this doesn't work, if so which?

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This would work on all browsers according to RFC 3986 Section 4.2. They call it relative reference.

Further more I have seen good JavaScript coders using it / recommending it

1. The protocol-relative URL by Paul Irish
2. Cripple the Google CDN’s caching with a single character by Dave Ward

Furthermore you can find related questions here and here.