(function(){ try { var forceLegacy = false; try { forceLegacy = (location.search.indexOf('forceLegacy=1') > -1) || (localStorage.getItem('forceLegacy') === '1'); } catch(e) {} var ua = navigator.userAgent || ''; var isIE = ua.indexOf('MSIE ') > -1 || ua.indexOf('Trident/') > -1; function parseMajorAfter(token){ var start = ua.indexOf(token); if (start < 0) return null; var value = ''; for (var i = start + token.length; i < ua.length; i++) { var ch = ua.charAt(i); if (ch < '0' || ch > '9') break; value += ch; } return value ? parseInt(value, 10) : null; } var isEdge = ua.indexOf('Edg/') > -1; var isFirefox = ua.indexOf('Firefox/') > -1; var isChrome = ua.indexOf('Chrome/') > -1 && ua.indexOf('Edg/') === -1 && ua.indexOf('OPR/') === -1; var isIOS = /iP(hone|od|ad)/.test(ua); var isSafari = (!isChrome && !isEdge && ua.indexOf('Safari/') > -1) || (isIOS && ua.indexOf('Safari/') > -1); // Be conservative on legacy Windows shells (e.g., Chrome 86/360) var min = { chrome: 90, edge: 90, firefox: 90, safari: 13, ios: 13 }; var unsupported = false; if (isIE) unsupported = true; else if (isEdge) { var vEdge = parseMajorAfter('Edg/'); unsupported = vEdge !== null && vEdge < min.edge; } else if (isChrome) { var vChr = parseMajorAfter('Chrome/'); unsupported = vChr !== null && vChr < min.chrome; } else if (isFirefox) { var vFx = parseMajorAfter('Firefox/'); unsupported = vFx !== null && vFx < min.firefox; } else if (isSafari) { if (isIOS) { var vIOS = parseMajorAfter('Version/') || parseMajorAfter('OS '); unsupported = vIOS !== null && vIOS < min.ios; } else { var vSaf = parseMajorAfter('Version/'); unsupported = vSaf !== null && vSaf < min.safari; } } var cssMissing = []; if ('CSS' in window && typeof CSS.supports === 'function') { // Keep this check informational only. Several stable Safari releases // lag on newer CSS features that are safe to degrade gracefully. var checks = [ ['display','grid'], ['gap','1rem'], ['position','sticky'], ['aspect-ratio','1 / 1'] ]; for (var i=0;i