(function () { try { var ok = true; // Each test mirrors something the bundle actually relies on. Written as // strings + eval so that a PARSE failure here is caught rather than // becoming the very crash we are trying to report. var checks = [ 'var a = {b:1}; var c = a?.b;', // optional chaining (Chrome 80) 'var a = null; var b = a ?? 1;', // nullish coalescing (Chrome 80) 'var a = [1,2]; a.at(-1);', // Array.prototype.at (Chrome 92) 'Object.hasOwn({a:1}, "a");', // Object.hasOwn (Chrome 93) 'new Promise(function(r){r()}).finally(function(){});' // Promise.finally (Chrome 63) ]; for (var i = 0; i < checks.length; i++) { try { (0, eval)(checks[i]); } catch (e) { ok = false; break; } } // Things the app needs that are not syntax. if (ok && (typeof fetch !== 'function' || typeof localStorage === 'undefined')) ok = false; if (ok) return; // ---- Unsupported: replace the page with something actionable ---------- var isAndroid = /Android/i.test(navigator.userAgent); // An INSTALLED PWA on Android runs in the system WebView, which updates via // Play Store. Cheap tablets without Play Services can never update it - so // "update Chrome" would be useless advice there. Tell them to open the site // in Chrome instead. var inWebView = /\bwv\b/.test(navigator.userAgent) || (isAndroid && window.matchMedia && window.matchMedia('(display-mode: standalone)').matches); var advice = inWebView ? 'Open this page in the Chrome app instead of the installed shortcut, then update Chrome from the Play Store.' : (isAndroid ? 'Please update the Chrome app from the Play Store, then reopen Avano.' : 'Please update your browser to the latest version, then reopen Avano.'); var storeLink = isAndroid ? 'Update Chrome' : ''; document.documentElement.innerHTML = '' + '

' + '

This device needs a browser update

' + '

' + advice + '

' + '

' + storeLink + '

' + '

Avano needs a recent browser to keep your sales and stock accurate. ' + 'If you cannot update this device, ask your manager - a different tablet or phone will work.

' + '

'; } catch (e) { // Never let the guard itself break a working browser. } })();

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