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- <!DOCTYPE html>
- <html>
- <head>
- <!--
- If you are serving your web app in a path other than the root, change the
- href value below to reflect the base path you are serving from.
-
- The path provided below has to start and end with a slash "/" in order for
- it to work correctly.
-
- For more details:
- * https://developer.mozilla.org/en-US/docs/Web/HTML/Element/base
-
- This is a placeholder for base href that will be replaced by the value of
- the `--base-href` argument provided to `flutter build`.
- -->
- <base href="$FLUTTER_BASE_HREF">
-
- <meta charset="UTF-8">
- <meta content="IE=Edge" http-equiv="X-UA-Compatible">
- <meta name="description" content="A new Flutter project.">
-
- <!-- iOS meta tags & icons -->
- <meta name="apple-mobile-web-app-capable" content="yes">
- <meta name="apple-mobile-web-app-status-bar-style" content="black">
- <meta name="apple-mobile-web-app-title" content="mobile">
- <link rel="apple-touch-icon" href="icons/Icon-192.png">
-
- <!-- Favicon -->
- <link rel="icon" type="image/png" href="favicon.png"/>
-
- <title>mobile</title>
- <link rel="manifest" href="manifest.json">
- </head>
- <body>
- <!-- This script installs service_worker.js to provide PWA functionality to
- application. For more information, see:
- https://developers.google.com/web/fundamentals/primers/service-workers -->
- <script>
- var serviceWorkerVersion = null;
- var scriptLoaded = false;
- function loadMainDartJs() {
- if (scriptLoaded) {
- return;
- }
- scriptLoaded = true;
- var scriptTag = document.createElement('script');
- scriptTag.src = 'main.dart.js';
- scriptTag.type = 'application/javascript';
- document.body.append(scriptTag);
- }
-
- if ('serviceWorker' in navigator) {
- // Service workers are supported. Use them.
- window.addEventListener('load', function () {
- // Wait for registration to finish before dropping the <script> tag.
- // Otherwise, the browser will load the script multiple times,
- // potentially different versions.
- var serviceWorkerUrl = 'flutter_service_worker.js?v=' + serviceWorkerVersion;
- navigator.serviceWorker.register(serviceWorkerUrl)
- .then((reg) => {
- function waitForActivation(serviceWorker) {
- serviceWorker.addEventListener('statechange', () => {
- if (serviceWorker.state == 'activated') {
- console.log('Installed new service worker.');
- loadMainDartJs();
- }
- });
- }
- if (!reg.active && (reg.installing || reg.waiting)) {
- // No active web worker and we have installed or are installing
- // one for the first time. Simply wait for it to activate.
- waitForActivation(reg.installing || reg.waiting);
- } else if (!reg.active.scriptURL.endsWith(serviceWorkerVersion)) {
- // When the app updates the serviceWorkerVersion changes, so we
- // need to ask the service worker to update.
- console.log('New service worker available.');
- reg.update();
- waitForActivation(reg.installing);
- } else {
- // Existing service worker is still good.
- console.log('Loading app from service worker.');
- loadMainDartJs();
- }
- });
-
- // If service worker doesn't succeed in a reasonable amount of time,
- // fallback to plaint <script> tag.
- setTimeout(() => {
- if (!scriptLoaded) {
- console.warn(
- 'Failed to load app from service worker. Falling back to plain <script> tag.',
- );
- loadMainDartJs();
- }
- }, 4000);
- });
- } else {
- // Service workers not supported. Just drop the <script> tag.
- loadMainDartJs();
- }
- </script>
- </body>
- </html>
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