Here is a list of reserved words:
as | finally | public |
break | for | return |
case | function | super |
catch | if | switch |
class | import | this |
const | in | throw |
continue | instanceof | true |
debugger | is | try |
default | item* | typeof |
delete | namespace | use |
do | new | var |
else | null | void |
export | package | while |
extends | private | with |
false | protected |