How do i create those buttons that allow you to upload data from your device?!

Question

I want to create a type of button that, when clicked it allows you to select an item from your device and upload it as an attachment. Problem is i donno how. PLEASE HELP

Answer 1

Like <input type="file" /> ?

Answer 2

I think you can do it this way :
https://code.sololearn.com/W3Iv96vryNvp/?ref=app