mirror of https://github.com/calzoneman/sync.git
Detect old browser JS engines
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@ -2,7 +2,7 @@
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"author": "Calvin Montgomery",
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"name": "CyTube",
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"description": "Online media synchronizer and chat",
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"version": "3.85.0",
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"version": "3.85.1",
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"repository": {
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"url": "http://github.com/calzoneman/sync"
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},
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@ -1,4 +1,55 @@
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/*eslint no-unused-vars: "off"*/
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(function() {
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/**
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* Test whether the browser supports nullish-coalescing operator.
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*
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* Users with old browsers will probably fail to load the client correctly
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* because parsing this operator in older browsers results in a SyntaxError
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* that aborts compilation of the entire script (not just an exception where
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* it is used). In particular, as of 2023-01-28, Utherverse ships with
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* a rather old browser version (Chrome 76) and several users have reported
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* it not working.
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*/
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try {
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try {
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new Function('x?.y');
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} catch (e) {
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if (e.name === 'SyntaxError') {
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/**
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* If we're at this point, we can't be sure what scripts have
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* actually loaded, so construct the error alert the old
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* fashioned way.
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*/
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var wrap = document.createElement('div');
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wrap.className = 'col-md-12';
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var al = document.createElement('div');
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al.className = 'alert alert-danger';
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var title = document.createElement('strong');
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title.textContent = 'Unsupported Browser';
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var msg = document.createElement('p');
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msg.textContent = 'It looks like your browser does not support ' +
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'the required JavaScript features to run ' +
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'CyTube. This is usually caused by ' +
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'using an outdated browser version. Please '+
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'check if an update is available. Your ' +
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'browser version is reported as:';
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var version = document.createElement('tt');
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version.textContent = navigator.userAgent;
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wrap.appendChild(al);
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al.appendChild(title);
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al.appendChild(msg);
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al.appendChild(document.createElement('br'));
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al.appendChild(version);
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document.getElementById('motdrow').appendChild(wrap);
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}
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}
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} catch (e) {
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console.error('Error probing for feature support:', e.stack);
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}
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})();
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var CL_VERSION = 3.0;
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var GS_VERSION = 1.7; // Google Drive Userscript
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