1. 确认您的应用程序已启用Service Worker，您可以在app.module.ts文件中检查其是否已被注册。以下是一个例子：

import { BrowserModule } from '@angular/platform-browser';
import { NgModule } from '@angular/core';
import { AppComponent } from './app.component';
import { ServiceWorkerModule } from '@angular/service-worker';
import { environment } from '../environments/environment';

@NgModule({
  declarations: [
    AppComponent
  ],
  imports: [
    BrowserModule,
    ServiceWorkerModule.register('ngsw-worker.js', {
      enabled: environment.production,
      // other options here...
    })
  ],
  providers: [],
  bootstrap: [AppComponent]
})
export class AppModule { }

2. 确认您的Service Worker缓存策略是否正确配置。检查ngsw-config.json文件并更新resources中的配置以确保您要缓存的文件被包含在其中。您还可以在ngsw-config.json中查看或更新缓存时间。

例如，在ngsw-config.json文件中：

{
  "$schema": "./node_modules/@angular/service-worker/config/schema.json",
  "index": "/index.html",
  "assets": [
    "favicon.ico",
    "assets/*",
    "manifest.json"
  ],
  "dataGroups": [
    {
      "name": "api-freshness",
      "urls": [
        "https://example.com/api/products"
      ],
      "cacheConfig": {
        "strategy": "freshness",
        "maxAge": "5m",
        "maxSize": 100
      }
    },
    {
      "name": "images",
      "urls": [
        "https://example.com/images/**"
      ],
      "cacheConfig": {
        "maxSize": 50,
        "maxAge": "1d",
        "timeout": "10s"
      }
    }
  ]
}

3. 确认您的应用程序的Service Worker是否已升级。您可以通过删除浏览器缓存并在新的应用程序版本中重新加载页面来安装更新。或