Javascript tips: how to change the background color of a webpage and the color of a select box simultaneously

This article describes how to change the background color of a webpage in javascript and the color in the select box at the same time. the example analyzes the select and css style operations in javascript, which has some reference value, for more information about how to change the background color of a webpage in JavaScript and the color in the select box, see the following example. Share it with you for your reference. The specific implementation method is as follows:

The code is as follows:

JS enables the color of the webpage background to change at the same time as the color in the select box