ReactJs PWA未显示更新可用模式

如何解决ReactJs PWA未显示更新可用模式

我已经创建了一个用于处理“新更新可用零食”的组件，并且一切都可以在Desktop中按预期工作，但是在移动设备上却无济于事。

在Andorid中，当我刷新页面时，它会更新而不显示模式。 在未定义的时间后，它会在ios中更新。

我该如何实现？ 在这些情况下寻找最佳做法。

我的PWA组件：

import React,{ Component } from "react";
//default imports...
import { withSnackbar } from "notistack";
import * as serviceWorker from "./serviceWorker";
import { Button } from "@material-ui/core";

class PWA extends Component {
  constructor(props) {
    super(props);
    this.state = {
      waitingWorker: {},};
  }

  componentDidMount = () => {
    serviceWorker.register({ onUpdate: this.onServiceWorkerUpdate });
  };

  registerPwaopeningHandler = (reg) => {
    let hidden;
    let visibilityChange;
    if (typeof document.hidden !== "undefined") {
      // Opera 12.10 and Firefox 18 and later support
      hidden = "hidden";
      visibilityChange = "visibilitychange";
    } else if (typeof document.msHidden !== "undefined") {
      hidden = "msHidden";
      visibilityChange = "msvisibilitychange";
    } else if (typeof document.webkitHidden !== "undefined") {
      hidden = "webkitHidden";
      visibilityChange = "webkitvisibilitychange";
    }

    window.document.addEventListener(visibilityChange,() => {
      if (!document[hidden]) {
        // manually force detection of a potential update when the pwa is opened
        reg.update();
      }
    });

    return reg;
  };

  onServiceWorkerUpdate = (registration) => {
    const { enqueueSnackbar } = this.props;
    // alert("new upodate"); this alert wornt trigered in mobile device
    this.setState(
      {
        waitingWorker: registration && registration.waiting,},() => {
        enqueueSnackbar("A new version was released",{
          persist: true,variant: "success",action: this.refreshAction(),});
      }
    );
  };

  updateServiceWorker = () => {
    const { waitingWorker } = this.state;
    waitingWorker && waitingWorker.postMessage({ type: "SKIP_WAITING" });
    this.setState({ newVersionAvailable: false });
    window.location.reload();
  };

  refreshAction = (key) => {
    //render the snackbar button
    return (
      <Button
        className="snackbar-button"
        size="small"
        onClick={this.updateServiceWorker}
      >
        {"refresh"}
      </Button>
    );
  };

  render() {
    return null;
  }
}
export default withSnackbar(PWA); //uses the snackbar context

我的CRA serviceWorker

// This optional code is used to register a service worker.
// register() is not called by default.

// This lets the app load faster on subsequent visits in production,and gives
// it offline capabilities. However,it also means that developers (and users)
// will only see deployed updates on subsequent visits to a page,after all the
// existing tabs open on the page have been closed,since prevIoUsly cached
// resources are updated in the background.

// To learn more about the benefits of this model and instructions on how to

const isLocalhost = Boolean(
  window.location.hostname === "localhost" ||
    // [::1] is the IPv6 localhost address.
    window.location.hostname === "[::1]" ||
    // 127.0.0.0/8 are considered localhost for IPv4.
    window.location.hostname.match(
      /^127(?:\.(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)){3}$/
    )
);

export function register(config) {
  if (process.env.NODE_ENV === "production" && "serviceWorker" in navigator) {
    // The URL constructor is available in all browsers that support SW.
    const publicUrl = new URL(process.env.PUBLIC_URL,window.location.href);
    if (publicUrl.origin !== window.location.origin) {
      // Our service worker won't work if PUBLIC_URL is on a different origin
      // from what our page is served on. This might happen if a CDN is used to
      // serve assets;
      return;
    }

    window.addEventListener("load",() => {
      const swUrl = `${process.env.PUBLIC_URL}/service-worker.js`;

      if (isLocalhost) {
        // This is running on localhost. Let's check if a service worker still exists or not.
        checkValidServiceWorker(swUrl,config);

        // Add some additional logging to localhost,pointing developers to the
        // service worker/PWA documentation.
        navigator.serviceWorker.ready.then(() => {
          console.log(
            "This web app is being served cache-first by a service " +
              "worker
          );
        });
      } else {
        // Is not localhost. Just register service worker
        registerValidSW(swUrl,config);
      }
    });
  }
}

function registerValidSW(swUrl,config) {
  navigator.serviceWorker
    .register(swUrl)
    .then((registration) => {
      registration.onupdatefound = () => {
        const installingWorker = registration.installing;
        // Execute callback
        if (config && config.onUpdate) {
          config.onUpdate(registration);
        }

        if (installingWorker == null) {
          return;
        }
        installingWorker.onstatechange = () => {
          if (installingWorker.state === "installed") {
            if (navigator.serviceWorker.controller) {
              // At this point,the updated precached content has been fetched,// but the prevIoUs service worker will still serve the older
              // content until all client tabs are closed.
              console.log(
                "New content is available and will be used when all " +
                  "tabs for this page are closed. See 
              );

              // // Execute callback
              // if (config && config.onUpdate) {
              //   config.onUpdate(registration);
              // }
            } else {
              // At this point,everything has been precached.
              // It's the perfect time to display a
              // "Content is cached for offline use." message.
              console.log("Content is cached for offline use.");

              // Execute callback
              if (config && config.onSuccess) {
                config.onSuccess(registration);
              }
            }
          }
        };
      };
    })
    .catch((error) => {
      console.error("Error during service worker registration:",error);
    });
}

function checkValidServiceWorker(swUrl,config) {
  // Check if the service worker can be found. If it can't reload the page.
  fetch(swUrl,{
    headers: { "Service-Worker": "script" },})
    .then((response) => {
      // Ensure service worker exists,and that we really are getting a JS file.
      const contentType = response.headers.get("content-type");
      if (
        response.status === 404 ||
        (contentType != null && contentType.indexOf("javascript") === -1)
      ) {
        // No service worker found. Probably a different app. Reload the page.
        navigator.serviceWorker.ready.then((registration) => {
          registration.unregister().then(() => {
            window.location.reload();
          });
        });
      } else {
        // Service worker found. Proceed as normal.
        registerValidSW(swUrl,config);
      }
    })
    .catch(() => {
      console.log(
        "No internet connection found. App is running in offline mode."
      );
    });
}

export function unregister() {
  if ("serviceWorker" in navigator) {
    navigator.serviceWorker.ready
      .then((registration) => {
        registration.unregister();
      })
      .catch((error) => {
        console.error(error.message);
      });
  }
}