ExtJs Application Cache warning

Question

I have a single page app written with ExtJs. I'm not using the application cache but when the app launches I see the following warning in Chrome:

[Deprecation] Application Cache API use is deprecated and will be removed in M82, around April 2020. See https://www.chromestatus.com/features/6192449487634432 for more details.

This question has been posted multiple times on the Sencha forums (here and here) going back several years. The only response has been from a non-Sencha poster saying it "should be ok." Not exactly the answer you would hope for.

Does anyone have any idea how to get rid of this warning? Considering I am not explicitly using the application cache it sounds as if ExtJs might be doing something with it in the background. That is what concerns me.

Answer 1

You can turn appCache off in app.json:

/**
  * Settings specific to production builds.
  */
"production": {
    "output": {
        "appCache": {
            "enable": true, // <- change this to false and rebuild
            "path": "cache.appcache"
        }
    },