Reserved keywords in JavaScript

We should be linking to the actual sources of info, rather than just the top google hit.

http://developer.mozilla.org/En/Core_JavaScript_1.5_Reference/Reserved_Words

JScript 8.0: http://msdn.microsoft.com/en-us/library/ttyab5c8.aspx

To supplement benc's answer, see Standard ECMA-262. These are the official reserved words, but only a pedant ignores the implementation to respect the standard. For the reserved words of the most popular implementations, that is firefox and internet explorer, see benc's answer.

The reserved words in EMCAScript-262 are the Keywords, Future Reserved Words, NullLiteral, and BooleanLiterals, where the Keywords are

break     do        instanceof  typeof
case      else      new         var
catch     finally   return      void
continue  for       switch      while
debugger  function  this        with
default   if        throw
delete    in        try

the Future Reserved Word​s are

abstract  export      interface  static
boolean   extends     long       super
byte      final       native     synchronized
char      float       package    throws
class     goto        private    transient
const     implements  protected  volatile
double    import      public 
enum      int         short

the NullLiteral is

null

and the BooleanLiterals are

true
false

Here is a list from Eloquent JavaScript book:

• break
• case
• catch
• class
• const
• continue
• debugger
• default
• delete
• do
• else
• enum
• export
• extend
• false
• finally
• for
• function
• if
• implements
• import
• in
• instanceof
• interface
• let
• new
• null
• package
• private
• protected
• public
• return
• static
• super
• switch
• this
• throw
• true
• try
• typeof
• var
• void
• while
• with
• yield