http://foo.com vs. //foo.com in tag?

Question

I found lots of sites using <a href='//foo.com'> instead of <a href='http://foo.com'>

Is there any difference?
What are the benefits?

When using // instead of http://, is it possible to direct them to https://?

I think this has been answered before: [http://stackoverflow.com/questions/9358609/why-do-i-keep-seeing-instead-of-http-for-resources-lately][1] [1]: http://stackoverflow.com/questions/9358609/why-do-i-keep-seeing-instead-of-http-for-resources-lately — Mark Kelly, Jan 31 '15 at 23:46

score 0 · Accepted Answer · answered Feb 01 '15 at 02:57

0

It is a protocol-relative URL. Every URL such as this inherits parent document's protocol (HTTP or HTTPS). Useful if you want to serve both versions of webpage.

answered Feb 01 '15 at 02:57

zakjan

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http://foo.com vs. //foo.com in tag?

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