Use file uploader for file size till 100mb, later use chunks by its own

[NeelBhatt]

We want to use ng2 file uploader only for files till 100mb and if file size is more than 100mb, we do not want to use the library and want to upload it by converting it into chunks. We can put a condition to check if file size is greater than 100mb but how can we get actual file object which we can convert to chunks? Has anyone used like this before? Thanks in advance.