Nginx try_files fallback path returns 404 when using url query args

Question

Goal

I have a folder /assets which contains files like index.hml, css/*, js/*, etc.

Here is what I want to accomplish:

• / or index.html server index.html
• Try to try to a serve static file (css/main.css, etc)
• If above fails, 404

I also need query params ($args) to be passed through

Here is my enginx partial configuration:

location / {
  root /assets;
  try_files $uri $uri/index.html$is_args$args =404;
}

With this settings I get the following results:

• domain.com/css/main.css > 200: domain.com/css/main.css

• domain.com/index.html > 200: domain.com/index.html

• domain.com/ > 200: (renders same as domain.com/index.html)
• domain.com/index.html?q=x > 200: domain.com/index.html?q=x
• domain.com/?q=x > 404: Not Found

Question

What do I have to change to have domain.com/?q=x to return the same response as domain.com/index.html?q=x instead of not 404

Answer 1

The proposed answer by @richard-smith solved it

location / {
  root /assets;
   index index.html;
   try_files $uri $uri/ =404;