html - How to prevent loading image from cache when the src is a redirect url to the actual image file -


all:

when try solve problem when load image cache, got answers post:how force web browser not cache images

it talks add timestamp src 

<img src="picture.jpg?1222259157.415" alt="">

but in case, not direct image url, avatar url github like:

<img src="https://avatars.githubusercontent.com/u/614?v=3" alt="">

when add timestamp 79399.92599998368 it, becomes:

<img src="https://avatars.githubusercontent.com/u/614?v=379399.92599998368" alt="">

i wonder why src can still correctly recognized , image url changed? tell me why works , how browser deal this?

thanks

a question mark (?) in url separates location , query string, listing arguments.

in case, github ignores arguments , serves image identified location part. in other words, github looks @ first part , serves same content, user's browser cannot predict this, needs load content if whole url doesn't fit cached one.


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