I have a FileList object which holds previously uploaded documents. I'm trying to use another function to add more files to this collection, by using another FileList object, so I need to "append" the secondary FileList object onto the primary one. How would it be possible to achieve this?
You have to first convert the FileList
objects to Arrays, after which you can simply concat
the multiple arrays.
const joined = Array.from(fileListA).concat(Array.from(fileListB));