No squiggly lines. I put code in a JS checker and results were…
1:1 error '$w' is not defined. (no-undef)
2:3 error '$w' is not defined. (no-undef)
2:29 error 'Event' is defined but never used. (no-unused-vars)
3:42 error '$w' is not defined. (no-undef)
8:5 error '$w' is not defined. (no-undef)
10:5 error '$w' is not defined. (no-undef)
11:5 error '$w' is not defined. (no-undef)
12:5 error '$w' is not defined. (no-undef)
13:5 error '$w' is not defined. (no-undef)