html - How does Reddit display anchor tags as images? -


example here: http://www.reddit.com/r/fffffffuuuuuuuuuuuu/comments/fn9e7/the_best_thing_about_walking_to_school/c1h7af4

i tried peek dom via firebug couldn't find reference images. found href attribute of anchor tags decides image displayed. new me. how work?

it's css background-image in :after pseudo-selector.


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