♻️Update base href in index.html for serving web app in a non-root path

esentis · Aug 7, 2024 · 05e9ff5 · 05e9ff5
1 parent b14c6ac
commit 05e9ff5
Showing 1 changed file with 30 additions and 86 deletions.
diff --git a/example/web/index.html b/example/web/index.html
@@ -1,7 +1,7 @@
 <!DOCTYPE html>
 <html>
-<head>
-  <!--
+  <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.
 
@@ -14,91 +14,35 @@
     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="$FLUTTER_BASE_HREF">
-
-  <meta charset="UTF-8">
-  <meta content="IE=Edge" http-equiv="X-UA-Compatible">
-  <meta name="description" content="A new Flutter project.">
-
-  <!-- iOS meta tags & icons -->
-  <meta name="apple-mobile-web-app-capable" content="yes">
-  <meta name="apple-mobile-web-app-status-bar-style" content="black">
-  <meta name="apple-mobile-web-app-title" content="example">
-  <link rel="apple-touch-icon" href="icons/Icon-192.png">
-
-  <!-- Favicon -->
-  <link rel="icon" type="image/png" href="favicon.png"/>
-
-  <title>example</title>
-  <link rel="manifest" href="manifest.json">
-</head>
-<body>
-  <!-- This script installs service_worker.js to provide PWA functionality to
+    <base href="$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="example" />
+    <link rel="apple-touch-icon" href="icons/Icon-192.png" />
+
+    <!-- Favicon -->
+    <link rel="icon" type="image/png" href="favicon.png" />
+
+    <title>example</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;
+    <script>
+      if ("serviceWorker" in navigator) {
+        window.addEventListener("load", function () {
+          navigator.serviceWorker.register("flutter_service_worker.js");
+        });
       }
-      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>
+    </script>
+    <script src="main.dart.js" type="application/javascript"></script>
+  </body>
 </html>