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Editorial Team
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Asked: 2026-06-03T01:01:48+00:00

This is a newbie question, I know, but I couldn’t find clear answer. My

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This is a newbie question, I know, but I couldn’t find clear answer.

My web root looks like this:

/index.html

/img

I set up subdomain img.my-domain.com, it points to /img folder

Now, in my index.html I call image located in subdomain i.e. folder img

I can do it using relative and absolute path, both are working:

src=”/img/image.jpg”

src=”http://img.my-domain.com/image.jpg”

My question is: is there any difference? In the context of parallel downloads concept, is the image gonna be perceived by browser as coming from subdomain in both cases?

I have a lot of images and want to serve them from 2 subdomains. However I develop locally and when the website will go online, I would have to change image links from relative to absolute in case absolute path is required.

Thanks

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1 Answer

  1. Editorial Team

    src=”/img/image.jpg”

    Will send cookies for http://www.my-domain.com. Won’t appear as a separate domain.

    src=”http://img.my-domain.com/image.jpg”

    Will have separate cookies. Many websites do this to improve performance.

    You should real use the relative protocol so if you need SSL, you won’t get warnings. src="//img.my-domain.com/image.jpg"

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