javascript - How to move elements on scroll-down with scrolling down the page? -

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please @ website. see in sections, when scroll down page, actual page not going down, elements , images start moving taking effect. did best implement such thing failed how can implement such thing (specially taking effect)?

a nice site, , example of parallax scrolling.

achieving site going take long time, can start looking @ parallax sites here, idea of source code , through demo's.


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