Upload / download .stl files by javascript

hi there
its my first time here
I need to upload .stl files by form in html after that store the file in database to view the file in grid in another page and when click button download this file
so how I can do that Is there a reference for this or ready code to solve the problem? I just want to upload and download the file. I don’t want to display it?
please any idea

Hello and welcome!

Here is Playground example how to upload files to scene - https://playground.babylonjs.com/#3AN09E#9
You may use it as a base for your specific needs.

It’s better if you create a Playground with your code as it makes it much easier for the community to debug.