JavaScript custom browser scroll bars compatible with IE, Firefox, and chrome

This article mainly shares ideas and methods for implementing browser scroll bar compatibility with IE, Firefox and chrome using native JavaScript, which has some reference value, let's take a look at the following small series. Today we will share with you the browser scroll bar I made myself. We know that it is quite good to use css to customize the scroll bar, although css can be customized to change the style of the chrome browser scroll bar, css can also change the color of the IE browser scroll bar. However, css can only change the color of IE, and CSS cannot change the style and color of Firefox. So it can only be implemented through JavaScript. There are also plug-ins. I will share my thoughts on using native JavaScript. First, let's see the effect in the previous figure:

The idea of JavaScript implementation is to simulate the browser's own scroll bar. The idea I made was to first place the entire document in a container, and then adjust the top value of p in the container to implement the rolling effect layout as follows:

 
 
 
 
 
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Define the slider and slide bar first, and then define a box for content loading. The layout is very simple. Set the body overflow to hidden to hide the default scroll bar.

The main idea is: slider moving distance/slider rolling range = Content Rolling distance/Content Rolling height; slider moving distance is the distance to be dragged after the mouse is pressed,

The scroll height of the content is the total height of the content minus the height of the visible area. In addition, the overall height of the scroll bar is the height of the visible area, the height of the slider = the height of the visible area/the total height of the content * the height of the visible area. The last step is to determine whether the browser is Firefox.