It may happen that f.e. a javascript doesn’t work online: check how you link your javascript; they must not be http, but https.
https and free hosting
It is a very serious problem: there are very good free hosting, but unfortunately without a free https service.
How avoid https problems in localhost
Since a solution to force browsers toward a secured connection (with https and not http) is using an .htaccess file in the root folder, you can avoid many problems with https in localhost with this code, which you can put into the .htaccess, before the last row:
RewriteCond %{HTTP_HOST} ^[^.]+\.[^.]{3}$So your .htacces file should contain these rows
RewriteEngine On
RewriteCond %{HTTPS} !on
RewriteCond %{HTTP_HOST} ^[^.]+.[^.]{3}$
RewriteRule (.*) https://%{HTTP_HOST}%{REQUEST_URI}
This way you will have, with the same file, in local an http connection, and in remore an https connection.
https in localhost
Ho provato in molti modi a creare dei certificati in local: sia Chrome sia Firefox li rifiutano.
Allora ho deciso di dire ai browser di accettare una eccezione alla sicurezza per quanto concerne localhost.
In linux però, con xampp, bisogna modificare anche il file /opt/lampp/etc/extra/httpd-ssl.conf indicandogli dove si trova localhost e poi riavviare il server, altrimenti dà un errore di permessi o di oggetto non trovato.