Well that’s what chrome apps were... These are being discontinued, though. Not sure what they are going to be replaced with. But basically ChromeOs is what you

Well that’s what chrome apps were... These are being discontinued, though. Not sure what they are going to be replaced with. But basically ChromeOs is what you describe... Also observablehq.com is a collection of community-created javascript notebooks that run locally. You may be able to find all you need there...