How to determine whether the scroll bar exists in jquery

Jquery method to determine whether the scroll bar exists: first use jquery to control the scroll bar scrolling; then determine whether the scroll bar is offset. If there is an offset, it means that the scroll bar exists. Otherwise, it means that the scroll bar does not exist. exist.

The operating environment of this tutorial: Windows 7 system, jquery version 1.10.0. This article is applicable to all brands of computers.

Judgment idea:

Use jQuery to control the scroll bar scrolling, and then determine whether the scroll bar is offset. If there is, the scroll bar exists, otherwise it does not exist without scrolling.

(Learning video sharing:jquery video tutorial)

Code implementation:

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