How to send child window values to parent window in local PC?

I would likt to just send child window value to parent window or call function from parent window in local PC. (display.html => Control.html)

but, my Web browser chrome, edge also cause CORS error.

I just would likt to make some html files and test in my local PC. How solve this problem?

I tried to configure chrome web browser but it doesn’t work.

[my chrome web browser version: 126.0.6478.127(public build) (64bit)]

here below my code and error capture.

Please let me know, Thanks 🙂

* parent window: Control.html

* child window: display.html

* my chrome browser error capture