js如何实现提示安装pwa的弹出层？
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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>PWA Install Button</title>
</head>
<body>
<button id="installBtn" style="display: none;">安装PWA</button>
<script>
let deferredPrompt;
window.addEventListener('beforeinstallprompt', (event) => {
// 阻止默认行为
event.preventDefault();
// 保存事件，稍后触发...点击查看剩余70%
by thinkfuture
我知道答案，我要回答
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