How to replace a file that doesn't exist in htaccess?

Question

htaccess

Subject, is it possible to make the user go to the address:
site.ru/file.docx
if the file is not found, he will be shown another file but all under the same link?

Answer 1

RewriteEngine on
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule ^file.docx$ /file.txt [L]