How to make the effect of pushpin?

Prompt how best to implement the effect of "hitting" the bottom of the block on the top when scrolling, have seen many times on sites, but to wigglit really did not work, usually do so with a footer. Something similar is FM in Google on the link
I would be grateful for any help..
June 5th 19 at 21:08
2 answers
June 5th 19 at 21:10
June 5th 19 at 21:12

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