When redirecting output to a file, how to NOT create a file if there is no output?

Question

bash

./myscript.sh 2>err.log
When the command is executed, the err.log file is created
How to cancel the creation of the file if nothing was written to stderr?
In my script, I delete the err.log file before executing the rest of the commands. I check the file size at the end of the script. If there is no file content, then I delete it after executing all commands.

Answer 1

No way.
When you open a redirect, you touch the file.
You can write all sorts of perversions, but it's easier to delete the file after execution if it is empty.