Window is not reactive and will not update automatically.

https://github.com/alfg/opendrinks/blob/f446f0e9356b9b43155d207b4f7c5214d9da91ab/src/components/RecipeToolbar.vue#L95

Likely use either https://vueuse.org/core/useWindowSize/#usewindowsize

Or set up event listeners for window `onMounted(() => { window.addEventListener('resize', () => { windowWidth.value = window.innerWidth })` etc etc.