One neat use case for the HTTP ETag header is client-side HTTP caching for GET requests. Along with the ETag header, the caching workflow requires you to fiddle with other conditional HTTP headers like If-Match or If-None-Match. However, their interaction can feel a bit confusing at times.Every time I need to tackle this, I end up spending some time browsing through the relevant MDN docs123 to jog my memory. At this point, I’ve done it enough times to justify spending the time to write this.Cach...