I am using javascript fetch-api to read files from a folder. Consider I have a folder named 'Bin_folder' which has 6 files

1. file1.bin
2. file2.bin
3. file3.bin
4. file4.bin
5. file5.bin
6. file6.bin

Now if 2 users are using my website at the same time ,

• one user should get any two different files (ie.. file3.bin & file5.bin)
• the other user should get any other two
• files should be unique

How can I do this in javascript without the use of node.js.?

fetch('Bin_folder/'+ selectedFile)
                  .then(response => response.arrayBuffer())
                  .then(data => {
                             // Data process //
                                 })