specter/CyTube
1
0
Fork 0
Code Issues Pull requests Packages Projects Releases Wiki Activity

Detect old browser JS engines

Browse source
This commit is contained in:
Calvin Montgomery 2023-01-28 19:41:39 -08:00
parent c78ef333da
commit 1a9d920884
2 changed files with 52 additions and 1 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

2
package.json
View file

@ -2,7 +2,7 @@
"author": "Calvin Montgomery",
"name": "CyTube",
"description": "Online media synchronizer and chat",
"version": "3.85.0",
"version": "3.85.1",
"repository": {
"url": "http://github.com/calzoneman/sync"
},

51
www/js/data.js
View file

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