Js drop-down selection box and input box are linked to add the selected value to the input box _ javascript tips

This article mainly introduces how to add the selected value to the input box by linking the js drop-down box and the input box. It involves the onchange event and page element traversal techniques in javascript and has some reference value, for more information about how to add a selected value to the input box, see the examples in this article. Share it with you for your reference. The details are as follows:

This example shows how to associate the js drop-down box with the input box to directly add the selected value to the input box. I believe many of you have seen this effect, saving the trouble of user input. Here, we use JS to directly assign the value to the input box. After understanding the principle, we can flexibly use it to expand more special effects.

Run the following command:

The Online Demo address is as follows:

Http://demo.jb51.net/js/2015/js-select-value-to-input-codes/

The Code is as follows:

The drop-down selection box is linked with the input box to directly add the selected value to the input box.  Select  Unti1  Unti2  Unti3  Unti4  Unti5