I recently went on a brief deep dive into 103 Early Hints because I looked at a Shakapacker PR for adding 103 Early Hints support. Here’s what I learned. Briefly, 103 Early Hints is a status code for an HTTP response that happens before a regular HTTP response with content like HTML. The frontrunning response hints to the browser what additional assets (javascript, css) the browser will have to load when it renders the subsequent HTTP response with all the content. The idea being that the b...
