当我离线时，带有PWA的Angular Web App无法工作

Question

尽管这是我第一次在Angular项目中使用PWA，但我正在使用Angular和PWA构建音乐网络应用程序。但是我面临的问题是，当我单击Chrome中的离线模式时，我的应用程序无法正常工作。当我离线时，浏览器始终显示“无互联网连接”。请问我该怎么办？ 我网站的提单页面是https://naipod.com/home/music，下面是我的manifest.json内容和ngsw-config.json。

### manifest.json ###

{
  "name": "naipod",
  "short_name": "naipod",
  "theme_color": "#F96816",
  "background_color": "#fafafa",
  "display": "standalone",
  "scope": "/",
  "start_url": "/",
  "icons": [
    {
      "src": "assets/icons/icon-72x72.png",
      "sizes": "72x72",
      "type": "image/png"
    },
    {
      "src": "assets/icons/icon-96x96.png",
      "sizes": "96x96",
      "type": "image/png"
    },
    {
      "src": "assets/icons/icon-128x128.png",
      "sizes": "128x128",
      "type": "image/png"
    },
    {
      "src": "assets/icons/icon-144x144.png",
      "sizes": "144x144",
      "type": "image/png"
    },
    {
      "src": "assets/icons/icon-152x152.png",
      "sizes": "152x152",
      "type": "image/png"
    },
    {
      "src": "assets/icons/icon-192x192.png",
      "sizes": "192x192",
      "type": "image/png"
    },
    {
      "src": "assets/icons/icon-384x384.png",
      "sizes": "384x384",
      "type": "image/png"
    },
    {
      "src": "assets/icons/icon-512x512.png",
      "sizes": "512x512",
      "type": "image/png"
    }
  ]
}

ngsw-config.json

{
  "index": "/index.html",
  "assetGroups": [
    {
      "name": "app",
      "installMode": "prefetch",
      "resources": {
        "files": [
          "/favicon.ico",
          "/index.html",
          "/*.css",
          "/*.js"
        ]
      }
    }, {
      "name": "assets",
      "installMode": "lazy",
      "updateMode": "prefetch",
      "resources": {
        "files": [
          "/assets/**",
          "/*.(eot|svg|cur|jpg|png|webp|gif|otf|ttf|woff|woff2|ani)"
        ]
      }
    }
  ],
  "dataGroups": [{
    "name": "naipodapi",
    "urls": [
      "https://naipod.com/naipodapi/getsongs"

    ],
    "cacheConfig": {
      "strategy" : "performance",
      "maxAge" : "1d",
      "maxSize" : 100
    }
  }
  ]

}

我在做什么错了。