Two elements that influence this dynamic are the containers that hold content and a Web page's programming. Scroll bars can disappear when content is able to fit inside its container. For example ...

For those coming from a PC background, it may feel like ... its built-in scroll wheel to navigate up and down pages. How to change your scrolling preferences on a Mac If after a while, however ...

Isn’t it annoying when you’re scrolling through a page and it suddenly jumps back ... happen when a site loads additional content in the background above the visible area, pushing down what ...