vila4480 You can access files from a fixed location on your hard drive with NWJS.ReadFile() expression. You'll have to use the Desktop app to preview your project if you need to use NWJS features.
Thank you for your reply dop2000 - I am indeed using the desktop app and NWjs.Readfile(), but I'm getting a non-disclosed access error while in preview. I've tried exporting (which takes a long time between versions) as NWjs and it does work - but the preview mode just doesn't seem to be able to access local files at all.
Agreeing with Ashley, I'm thinking that would likely be a CORS issue, since the preview runs under "https://preview.construct.net" instead of localhost (like construct 2 used to run).
So my question is how should I set it up so that I can access my local files in preview mode without having to run a private server with special CORS policies set.
I'm sorry if it feels like I'm insisting on this topic, but so far I haven't seen any answers that solve the issue of working with local files in preview - and since this wasn't an issue in Construct 2, I'm having a hard time accepting that it isn't possible in Construct 3. There's got to be a way ..right?