Max File Count
Limit the number of files that can be uploaded. The uploader rejects additional files once the limit is reached.
What you should see: at most 3 files. Select a 4th and it is refused, with the first three left untouched in the queue.
Drag & drop files here, or paste from clipboard
<core-upload asp-upload-url="/api/upload/upload"
asp-max-count="3"
asp-multiple="true"
asp-progress="true">
</core-upload>