How to use the jsfl command to close the currently used document

I have opened several files, and I want to use the jsfl command to close the currently operating file, similar to ctrl+w, but there is no need to prompt to save. I checked the help manual,
Inside there is a fl.closeDocument(fl.documents[0], false);
But the closed file is not the currently operating document,
What I want now is to close the document I'm currently working on without being prompted to save it.
Can jsfl make it possible? I'm too dumb to code, but I need something like this.
can you help me? Thanks