dekun
90 lines
2.2 KiB
JavaScript
90 lines
2.2 KiB
JavaScript
(function (global) {
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var deferredPrompt = null;
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function isStandalone() {
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return (
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(global.matchMedia && global.matchMedia("(display-mode: standalone)").matches) ||
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global.navigator.standalone === true
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);
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}
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function btn() {
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return document.getElementById("hub-install-btn");
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}
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function setHint(msg) {
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var el = document.getElementById("hub-install-hint");
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if (el) el.textContent = msg || "";
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}
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function showInstall() {
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var el = btn();
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if (!el || isStandalone()) return;
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el.hidden = false;
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}
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function hideInstall() {
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var el = btn();
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if (el) el.hidden = true;
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setHint("");
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}
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function downloadShortcut() {
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var origin = global.location.origin;
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var body = "[InternetShortcut]\r\nURL=" + origin + "/\r\n";
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var blob = new Blob([body], { type: "application/internet-shortcut" });
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var a = document.createElement("a");
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a.href = URL.createObjectURL(blob);
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a.download = "期权中控.url";
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document.body.appendChild(a);
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a.click();
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a.remove();
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setTimeout(function () {
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URL.revokeObjectURL(a.href);
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}, 1000);
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}
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async function onInstallClick() {
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setHint("");
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if (deferredPrompt) {
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deferredPrompt.prompt();
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try {
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var choice = await deferredPrompt.userChoice;
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deferredPrompt = null;
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if (choice && choice.outcome === "accepted") {
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hideInstall();
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return;
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}
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} catch (e) {
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deferredPrompt = null;
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}
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}
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downloadShortcut();
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setHint("已下载快捷方式，拖到桌面即可。Chrome / Edge 也可在地址栏右侧点「安装」。");
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}
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function boot() {
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if (isStandalone()) {
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hideInstall();
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return;
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}
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showInstall();
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global.addEventListener("beforeinstallprompt", function (ev) {
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ev.preventDefault();
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deferredPrompt = ev;
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showInstall();
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});
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global.addEventListener("appinstalled", function () {
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deferredPrompt = null;
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hideInstall();
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});
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var el = btn();
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if (el) el.addEventListener("click", onInstallClick);
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if ("serviceWorker" in navigator) {
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navigator.serviceWorker.register("/sw.js", { scope: "/" }).catch(function () {});
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}
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}
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global.HubPwa = { boot: boot };
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})(window);
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