Why is the script not processed in Contact Form 7?

Question

JavaScript

I needed to style the input file so that the name of the selected file is displayed in a certain field. Everything works fine anywhere in the template, except for the contact form 7 form template. I've already tried everything, and inserted the script into the form template itself, and output it to the header and footer, <?php wp_head(); ?> and <?php wp_footer(); ?> in place((( I tried everything, the name is still not displayed, that is, I see that this script is not processed exactly in the form! What to do, save me!

Answer 1

"so that the name of the selected file is displayed in a certain field" --- can you be more specific?
Better yet, a link to a page where it already works.