pwa

pwa(progressive web app) is an app that can be installed via a browser on windows, android, etc.
to enable the offline operation for this, register the service worker and cache resources.

webmanifest

if display does not support the specified mode, fall back in order fullscreen, standalone, minimal-ui, browser.
short_name may be used when name cannot be displayed in full.

code

<link rel='manifest' crossorigin='use-credentials' href='data:application/manifest+json;charset=utf-8,{
    "display":"fullscreen"
    ,"short_name":null
    ,"name":null
    ,"icons":[{
        "sizes":"any"
        ,"type":"image/svg+xml"
        ,"src":null
    }]
    ,"start_url":null
}'>