RewriteEngine On

# Handle CORS preflight requests
RewriteCond %{REQUEST_METHOD} OPTIONS
RewriteRule ^(.*)$ index.php [QSA,L]

# Route all requests to index.php
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule ^(.*)$ index.php [QSA,L]