manifest.json的'orientation'和'display'属性仅在注册Service Worker时有效吗？

Question

I'm building my first progressive web app. I haven't got as far as registering a service worker just yet, but I have created a manifest.json file, which looks like this:

{
  "short_name": "My PWA",
  "name": "My Progressive Web Application",
  "start_url": "/",
  "background_color": "#222",
  "display": "standalone",
  "scope": "/",
  "theme_color": "#222",
  "orientation": "portrait",
  "icons": [
    {
      "src": "/assets/images/logo-square-192.png",
      "type": "image/png",
      "sizes": "192x192"
    },
    {
      "src": "/assets/images/logo-square-512.png",
      "type": "image/png",
      "sizes": "512x512"
    }
  ]
}

I've loaded this onto a test server (not running over HTTPS currently, so I'm aware that a service worker won't work, hence I haven't got that far yet) and have looked at the site on Chrome latest on a new Nokia 6.1 running Android. I notice that the 'display' property doesn't seem to be doing what it should, and I can also turn the device to landscape and browse the site in that orientation. So it seems that the manifest.json file isn't doing anything.

I can't find any documentation stating whether the manifest.json file only becomes 'active' when a service worker is installed and/or via HTTPS so I wondered if anyone here could shed any light on this?

Many thanks.

Answer 1

So a bit of experimentation later... It seems the manifest.json rules only become active once the site has been added to the home-screen. (I don't have a service worker to facilitate this yet, but it can be done in the browser settings). So on Chrome/Android at least the manifest settings don't need HTTPS enabled nor a service worker.