Then on each host, Chrome starts off with no javascript, and there is an icon in the URL bar to enable it. Thus I can enable all javascript for trusted hosts. And in regular mode, that change is permanent, so I'm not bothered

Additionally, open up an incognito, and allow javascript for a host, and that decision is only valid as long as the incognito window is open.

So the workflow is:

1.) Always surf with javascript disabled

2.) Permanently allow all trusted hosts

3.) When needed, temporarily allow a host via incognito (ex: blogspot sites)

This does not require any additional extensions.