WURFL can no longer be loaded, preventing initialization of CodeWorld

[ByteEater-pl]

The textarea for code is small and the Run button has no visible effect. Probable cause is logged in the console:

Loading failed for the <script> with source “https://wurfl.io/wurfl.js”. code.world:182:62
Uncaught (in promise) ReferenceError: WURFL is not defined
initCodeworld https://code.world/js/codeworld.js:337
init https://code.world/js/codeworld.js:248
codeworld.js:337:22

[josephcsible]

The bug is here:

codeworld/web/js/codeworld.js

Line 337 in a553dab

styleActiveLine: !WURFL || !WURFL.is_mobile,

The !WURFL side of that check is intended to keep things working if WURFL doesn't load, but since that script is getting loaded in strict mode, accessing an undeclared variable that way is an error rather than just giving undefined.

[josephcsible]

#1644