ngsw-config.json

{
  "$schema": "./node_modules/@angular/service-worker/config/schema.json",
  "index": "/index.html",
  "appData": {
    "version": "0.0.1",
    "changelog": "Added better resource caching"
  },
  "assetGroups": [{
      "name": "app",
      "installMode": "prefetch",
      "updateMode": "prefetch",
      "resources": {
        "files": [
          "/index.html",
          "/manifest.webmanifest",
          "/*.css",
          "/main.*.js",
          "/polyfills.*.js",
          "/runtime.*.js",
          "/*.js",
          "!/*-sw.js"
        ]
      }
    },
    {
      "name": "assets",
      "installMode": "lazy",
      "updateMode": "prefetch",
      "resources": {
        "files": [
          "/assets/**",
          "/*.(eot|svg|cur|jpg|png|webp|gif|otf|ttf|woff|woff2|ani)"
        ],
        "urls": ["https://fonts.googleapis.com/**"]
      }
    }
  ],
  "dataGroups": [{
      "name": "from-static",
      "version": 1,
      "urls": ["/data/data.json"],
      "cacheConfig": {
        "strategy": "performance",
        "maxSize": 10,
        "maxAge": "1d",
        "timeout": "5s"
      }
    },
    {
      "name": "from-api",
      "version": 2,
      "urls": ["/statistics/current", "/statistics/historical"],
      "cacheConfig": {
        "strategy": "freshness",
        "maxSize": 15,
        "maxAge": "1h",
        "timeout": "3s"
      }
    }
  ]
}