How can users remove an attachment before upload?

Hello,
I’ve got a contact form up and running happily. If a user clicks ‘Browse’ to attach a file and chooses the file, what if they then decide they don’t want to upload any files? It would be great if the ‘Browse’ button then changed to a ‘Remove’ button, so the user had the option to not upload that file.

Currently, it seems that the only way to not upload the file is to either choose another file, or refresh the page and start everything again.

Or is there some way to implement this?

Thanks,

Paul

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