Can Service Workers respond to synchronous XHR requests?

Question

I would like to use Service Workers to enhance an existing web site. In particular, I would like to add better offline support by having Service Workers respond to requests

Answer 1

According to XMLHttpRequest spec, the fetch procedure for both synchronous and asynchronous requests is the same so, in theory, it should be intercepted but Synchronous XHR has been deprecated so I would not expect Chrome to fix this.