This will require updates in two areas:

• https://github.com/os-js/osjs-gui/blob/master/src/components/ListView.js - The selectedIndex needs to be changed to an array if a property named multiselect is set to true. As well as update the selection events to reflect this.
• FileManager UI needs to use mutliselect, and all event emitters needs to use arrays of refs, and not direct file refs.

So it should be fairly simple to implement this

I've started on implementing this. Here's a sneak preview:

Ref:

• Added multiselect to ListView (#32) osjs-gui#33
• Multiselect support (#22) #23

Actually I think beside gui, the VFS and Adapter needs to be changed too.
One part of problem is in osjs/gui that must select multiple rows, it seem you handled it.
Next step we need Adapter supports operations like delete on it.
Adapter operates on array of vfs.oject instead of single vfs.object.

The VFS does not need any changes The file manager can just use Promise.all to handle bulk operations.

I believe I've made all of the appropriate changes to the filemanager application, and now need to finish up the ListView component changes and I can put out a beta on npm for testing :)

Oh, Thank U Andres. How can I test beta version? Is it on npm rep at moment?

I haven't published it onto npm yet as I'm not 100% done.

You can try this out by checking out the code locally.

I tested multiselect option,but didnt works.
Even readdir throws bellow warning message:

TypeError: files.map is not a function

Also throws bellow warning as i click on edit menu:

TypeError: items.some is not a function

for readfile throws bellow error:

Uncaught TypeError: data.forEach is not a function