window.matchMedia is not supported, media queries will not work.

gymnast relies on window.matchMedia API to be able to set layout breakpoints (responsive layout) efficiently.

This error may occur when running gymnast on an environment where either window or window.matchMedia are not available.

window may not be available if running on a non web environment (e.g. Node) and window.matchMedia is not available on old browsers.

This is mostly a concern for SSR since All gymnast supported browsers support matchMedia.