Angular如何防止服务人员从api进行两次调用？

如何解决Angular如何防止服务人员从api进行两次调用？

我有PWA angular应用程序，我只希望可以缓存我的静态文件而不是api调用，因为有时它会调用两次。我该如何预防？

我的ngsw-config：

{
    "$schema": "./node_modules/@angular/service-worker/config/schema.json","index": "/index.html","assetGroups": [
      {
        "name": "app","installMode": "prefetch","resources": {
          "files": [
            "/favicon.ico","/index.html","/manifest.webmanifest","/*.css","/*.js"
          ]
        }
      },{
        "name": "assets","installMode": "lazy","updateMode": "prefetch","resources": {
          "files": [
            "/assets/**","/*.(eot|svg|cur|jpg|png|webp|gif|otf|ttf|woff|woff2|ani)"
          ]
        }
      }
    ]
  }

有时当api调用（进行GET）时，后端会收到2次调用，其中1次来自服务人员，第二次来自普通服务。如何预防呢？