Background

I migrate this blog to a performance server recently and proxy the service from another server.

It was testing the theme function, the theme didn't change after refresh no matter what I set.

Then I open the developer tool and found the css file was cached beacuse the request has a Cache-Control header.

It may be added by nginx on default.

Solution

I set the header to no-cache and everything works well

server {
    ...
    ...
    ...
    location / {
        ...
        ...
        ...
        add_header Cache-Control "no-cache";
        ...
        ...
        ...
    }
    ...
    ...
    ...
}