Алекс Арт

server {
	server_name m.example.ru ;
	ssl_certificate "/var/www/httpd-cert/example/m.example.ru_le1.crtca";
	ssl_certificate_key "/var/www/httpd-cert/example/m.example.ru_le1.key";
	ssl_ciphers EECDH:+AES256:-3DES:RSA+AES:!NULL:!RC4;
	ssl_prefer_server_ciphers on;
	ssl_protocols TLSv1 TLSv1.1 TLSv1.2;
	add_header Strict-Transport-Security "max-age=31536000;";
	ssl_dhparam /etc/ssl/certs/dhparam4096.pem;
	charset off;
	index index.php index.html;
	disable_symlinks if_not_owner from=$root_path;
	set $root_path /var/www/example/data/angular/mobile/src;
	root $root_path;
	gzip on;
	gzip_comp_level 9;
	gzip_disable "msie6";
	gzip_types text/plain text/css application/json application/x-javascript text/xml application/xml application/xml+rss text/javascript application/javascript;
	location / {
		location ~ [^/]\.ph(p\d*|tml)$ {
			try_files /does_not_exists @fallback;
		}
		location ~* ^.+\.(jpg|jpeg|gif|png|svg|js|css|mp3|ogg|mpe?g|avi|zip|gz|bz2?|rar|swf)$ {
			expires max;
			try_files $uri $uri/ @fallback;
		}
		location / {
			try_files /does_not_exists @fallback;
		}
	}
	location @fallback {
		proxy_pass http://127.0.0.1:4000;
		proxy_redirect http://127.0.0.1:4000 /;
		proxy_set_header Host $host;
		proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
		proxy_set_header X-Forwarded-Proto $scheme;
		proxy_set_header X-Forwarded-Port $server_port;
		access_log off;
	}
	access_log off;
	error_log /var/www/httpd-logs/m.example.ru.error.log notice;
	listen 80.252.130.250:443 ssl http2;
}

$('.switch').click(function(e) {
		e.preventDefault();
    var color = $(this).data('color');
    $('#viewport').css("background-color", color);
  });

<li><button class="switch" data-color="green">Green</button></li>