Native JavaScript implements scroll bar effect _javascript technique

This article illustrates the native JavaScript implementation of the scroll bar effect of the code, to share with you for your reference, the specific contents are as follows

The principle is to monitor the sliding bar, press the mouse button, monitor the mouse movement, and then according to the percentage of sliding movement of the rolling area to calculate the scrolling extent, with marginleft for scrolling, specific written in the comments.

The whole became an object to prevent all sorts of messy data from polluting global variables. In addition, functions that are called inside the object are also written to the object constructor, which cannot be invoked externally because of the principle of the scope chain of the object.

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Hopefully this article will help you learn about JavaScript programming.