nginx redirect non-www to www code example

Example 1: nginx redirect www to non-www

server {
    server_name www.example.com;
    return 301 $scheme://example.com$request_uri;
}

Example 2: nginx redirect to non www

server {
    server_name www.example.com;
    return 301 $scheme://example.com$request_uri;
}

Example 3: redirect www to non-www nginx

# With wildcard:

server {
    server_name ~^(www\.)(?<domain>.+)$;
    return 301 $scheme://$domain;
}