/* Keep this file in ES5 syntax: it must run even when the application cannot. */
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(function () {
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var finished = false;
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var lastError = '';
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var timer;
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function errorText(error) {
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return String(error && error.message ? error.message : error || '未知启动错误').slice(0, 300);
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}
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function showFailure(error) {
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if (finished || document.getElementById('mom-startup-error')) return;
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var box = document.createElement('section');
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box.id = 'mom-startup-error';
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box.setAttribute('role', 'alert');
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box.style.cssText = 'position:fixed;z-index:99999;left:0;right:0;top:0;bottom:0;overflow:auto;background:#fff;color:#0f172a;padding:24px;box-sizing:border-box;font:16px/1.6 sans-serif;';
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function line(tag, text) {
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var element = document.createElement(tag);
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element.textContent = text;
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element.style.wordBreak = 'break-word';
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box.appendChild(element);
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return element;
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}
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line('h2', '平台未能完成启动');
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line('p', '可能是浏览器兼容性或脚本加载失败。请打开检测页，将检测结果提供给管理员。');
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line('p', '启动信息：' + errorText(error));
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line('p', '浏览器：' + navigator.userAgent);
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var link = line('a', '打开浏览器检测页');
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link.href = document.querySelector('script[data-startup-check]').src.replace(/[^/]*$/, 'browser-check.html');
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link.style.cssText = 'display:block;min-height:48px;color:#0369a1;';
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var button = line('button', '重新加载');
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button.style.cssText = 'min-height:48px;padding:8px 20px;font-size:16px;';
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button.onclick = function () { window.location.reload(); };
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document.body.appendChild(box);
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}
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window.__MOM_STARTUP__ = {
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finish: function () {
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finished = true;
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window.clearTimeout(timer);
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var box = document.getElementById('mom-startup-error');
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if (box) box.parentNode.removeChild(box);
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},
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fail: function (error) { showFailure(error); }
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};
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window.addEventListener('error', function (event) {
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if (event.message) lastError = errorText(event.message);
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else if (event.target && event.target.tagName === 'SCRIPT') lastError = '脚本文件加载失败';
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}, true);
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window.addEventListener('unhandledrejection', function (event) { lastError = errorText(event.reason); });
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timer = window.setTimeout(function () {
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showFailure(lastError || '30 秒内未完成初始化；请检查浏览器能力与脚本请求。');
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}, 30000);
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}());
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