问题描述
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);
});
}
}
解决方法
暂无找到可以解决该程序问题的有效方法，小编努力寻找整理中！
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