truthy values,
try…catch statements,
two-way communication (generators),
typeof operator,
,
typeof v,
typographical conventions,
U
unary addition operator (+),
unary negation operator (-),
uncaught exceptions,
undefined types,
underscore character (_),
unhandled exceptions,
Unicode characters,
unshift method (arrays),
user input, asynchronous nature of,
UTC (Coordinated Universal Time),
V
value types,
valueOf() method,
values() method (maps),
var keyword,
variables
vs. arguments,
changing contents of,
vs. constants,
declaration vs. definition of,
declaring,
declaring multiple,
internal,
vs. literals,
(see also scope)
naming conventions,
shadowing,
undefined,
version control,
Version Control with Git (Loeliger),
(see also scope)
Visual Studio,
void operator,
W
W3C website,
WeakMap object,
Web 2.0,
Web Development with Node and Express
web servers,
WHATWG,
while loops,
while statements,
word boundaries (regexes),
word completion,
write streams,
X
XMLHttpRequest,
Y
yield expressions,
338 | Index
