Chrome Version       : 67.0.3396.62
OS Version: OS X 10.13.4
URLs (if applicable) :
Other browsers tested:
  Add OK or FAIL after other browsers where you have tested this issue:
     Safari: FAIL (no support for SharedWorker)
    Firefox: OK
    IE/Edge: FAIL (no support for SharedWorker)

What steps will reproduce the problem?
1. Paste this code in DevTools:

new SharedWorker(URL.createObjectURL(new Blob([`onconnect = e => {e.ports[0].onmessage = e => console.log(e['data'])}`], {type: 'text/javascript'}))).port.postMessage("hai")


What is the expected result?
See a log.

What happens instead of that?
You see nothing. Not even a request in the network tab. You need to inspect the SharedWorker itself via chrome://inspect#worker


UserAgentString: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_13_4) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/67.0.3396.62 Safari/537.36