Summary of the usage of the select drop-down box in javascript

This article mainly introduces the usage of select drop-down boxes in javascript. select is often used in development for Option Selection, for more information about the problem encountered in the development project, see the following section.

Question 1: how to select the value in select option?

First, a method onchange () is used. This method is mainly used to trigger the change time of the content in the selection box.

Implementation Code:

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