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Index.html
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<!DOCTYPE html>
<html lang="zh-CN">
<head>
<title>PWA demo</title>
<meta charset="utf-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0, shrink-to-fit=no">
<meta name="description" content="">
<meta name="author" content="">
<link rel="manifest" href="manifest.json">
<link rel="icon" type="image/png" sizes="144x144" href="images/logo-144.png">
<link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/bootstrap@4.3.1/dist/css/bootstrap.min.css"
asp-fallback-href="~/lib/bootstrap/dist/css/bootstrap.min.css" asp-fallback-test-class="sr-only"
asp-fallback-test-property="position" asp-fallback-test-value="absolute"
integrity="sha256-YLGeXaapI0/5IgZopewRJcFXomhRMlYYjugPLSyNjTY=" crossorigin="anonymous"/>
<link rel="stylesheet" href="css/site.css"/>
</head>
<body>
<header>
<nav class="navbar navbar-expand-md navbar-dark fixed-top bg-primary">
<a class="navbar-brand" href="javascript:void(0);">PWA demo</a>
<button class="navbar-toggler collapsed" type="button" data-toggle="collapse" data-target="#navbarCollapse"
aria-controls="navbarCollapse" aria-expanded="false" aria-label="Toggle navigation">
<span class="navbar-toggler-icon"></span>
</button>
<div class="navbar-collapse collapse" id="navbarCollapse">
<ul class="navbar-nav mr-auto">
<li class="nav-item active">
<a class="nav-link" href="javascript:void(0);">
Home <span class="sr-only">(current)</span>
</a>
</li>
<li class="nav-item">
<a class="nav-link" href="javascript:void(0);">Link</a>
</li>
<li class="nav-item">
<a class="nav-link disabled" href="javascript:void(0);">Disabled</a>
</li>
</ul>
<form class="form-inline mt-2 mt-md-0">
<input class="form-control mr-sm-2" type="text" placeholder="Search" aria-label="Search">
<button class="btn btn-outline-light my-2 my-sm-0" type="submit">Search</button>
</form>
</div>
</nav>
</header>
<main role="main" class="container">
<button id="btnInstall" class="btn btn-primary m-3" role="button" href="javascript:void(0);" aria-hidden="true" style="display: none">
安装
</button>
<p class="mt-3">必须使用http链接打开才可以看到安装按钮，用文件系统打开是不能看到的。</p>
<p>如使用 Visual Studio Code 打开可以使用 <a target="_blank" href="https://marketplace.visualstudio.com/items?itemName=ritwickdey.LiveServer">Live Server</a> 插件轻松实现使用http链接打开。</p>
</main>
<footer class="footer">
<div class="container text-center">
<span class="text-muted">Copyright © 2019 <a target="_blank" href="https://pwapp.net">PWAPP</a></span>
</div>
</footer>
<script src="https://cdn.jsdelivr.net/npm/jquery@3.4.1/dist/jquery.min.js"
asp-fallback-src="~/lib/jquery/dist/jquery.min.js" asp-fallback-test="window.jQuery"
integrity="sha256-CSXorXvZcTkaix6Yvo6HppcZGetbYMGWSFlBw8HfCJo=" crossorigin="anonymous">
</script>
<script src="https://cdn.jsdelivr.net/npm/bootstrap@4.3.1/dist/js/bootstrap.bundle.min.js"
asp-fallback-src="~/lib/bootstrap/dist/js/bootstrap.bundle.min.js"
asp-fallback-test="window.jQuery && window.jQuery.fn && window.jQuery.fn.modal"
integrity="sha256-fzFFyH01cBVPYzl16KT40wqjhgPtq6FFUB6ckN2+GGw=" crossorigin="anonymous">
</script>
<script async src="https://cdn.jsdelivr.net/npm/pwacompat@2.0.9/pwacompat.min.js"
integrity="sha384-VcI6S+HIsE80FVM1jgbd6WDFhzKYA0PecD/LcIyMQpT4fMJdijBh0I7Iblaacawc" crossorigin="anonymous">
</script>
<script type="text/javascript">
if ('serviceWorker' in navigator) {
navigator.serviceWorker.register('service-worker.js').then(function () {
console.log('Service Worker 注册成功');
});
}
var dfdPrompt = null;
var btnInstall = $("#btnInstall");
$(function () {
window.addEventListener('beforeinstallprompt', function (e) {
// 存储事件
dfdPrompt = e;
// 显示按钮
btnInstall.show();
// 阻止默认事件
e.preventDefault();
return false;
});
btnInstall.on("click", function () {
if (dfdPrompt == null) {
return;
}
// 通过按钮点击事件触发横幅显示
dfdPrompt.prompt();
// 监控用户的安装行为
dfdPrompt.userChoice.then(function (choiceResult) {
if (choiceResult.outcome === 'accepted') {
btnInstall.hide();
dfdPrompt = null;
}
});
});
});
</script>
</body>
</html>