indexTemplate function
Implementation
String indexTemplate({String? projectName}) => '''
<!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="$_url" />
<meta charset="UTF-8" />
<meta content="IE=Edge" http-equiv="X-UA-Compatible" />
<meta name="description" content="A new Flutter project." />
<!-- iOS meta tags & icons -->
<meta name="apple-mobile-web-app-capable" content="yes" />
<meta name="apple-mobile-web-app-status-bar-style" content="black" />
<meta name="apple-mobile-web-app-title" content="example" />
<link rel="apple-touch-icon" href="icons/Icon-192.png" />
<script src="https://unpkg.com/@lottiefiles/lottie-player@latest/dist/lottie-player.js"></script>
<!-- Favicon -->
<link rel="icon" type="image/png" href="favicon.png" />
<title>$projectName</title>
<link rel="stylesheet" href="splash/style.css" />
<link rel="manifest" href="manifest.json" />
</head>
<body>
<div id="preloader" class="preloader-container">
<div class="animation">
<div class="player">
<lottie-player
src="splash/splash.json"
background="transparent"
speed="1"
style="width: 400px; height: 400px"
loop
autoplay
></lottie-player>
</div>
</div>
</div>
<!-- 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);
}
let box = document.querySelector("#preloader");
function fadeOut() {
box.classList.add("visuallyhidden");
box.addEventListener(
"transitionend",
function (e) {
box.classList.add("hidden");
},
{
capture: false,
once: true,
passive: false,
}
);
}
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 {
//fadeOut();
// Existing service worker is still good.
console.log("Loading app from service worker.");
loadMainDartJs();
}
});
setTimeout(fadeOut, 3000);
// 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 {
fadeOut();
// Service workers not supported. Just drop the <script> tag.
loadMainDartJs();
}
</script>
</body>
</html>
''';
