JavaScript Reserved Words

ECMAScript Edition 3 Reserved Words

**These words are part of the JavaScript language as of ES3.**
break	for	throw
case	function	try
catch	if	typeof
continue	in	var
deeeeeeefault	instanceof	void
delete	new	while
do	return	with
else	switch
finally	this

ES3 Future Reservered Words

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

ECMAScript Edition 5 Reserved Words

**This is ES5's list of reserved words. It's similar to that of ES3, but given that browswers primarily support ES3, we recommend that you keep both lists in mind.**
break	finally	this
case	for	throw
catch	function	try
continue	if	typeof
debugger	in	var
default	instanceof	void
delete	new	while
do	return	with
else	switch

ES5 Future Reserved Words

class	import	public
const	interface	static
enum	let	super
export	package	yield
extends	private
implements	protected

Other identifiers to avoid

These aren't officaially reserved but since they are part of the JavaScript language, they should still be considered as avoidable especially as function and variable names. The results are unpredictable. Just be aware that some words may work in one browser but will fail in another, so always test, test, test.
abstract	get	prototype
arguments	goto	RangeError
Array	has	ReferenceError
Boolean	include	RegExp
byte	Infinity	rounding
call	int	set
cast	internal	short
char	intrinsic	standard
Date	is	strict
decimal	isFinite	String
decodeURI	isNaN	sychronized
decodeURIComponent	JSON	SyntaxError
double	like	throws
dynamic	long	to
each	Math	transient
encodeURI	namespace	true
encodeURICompenent	NaN	type
Error	native	TypeError
eval	null	uint
EvalError	Number	undefined
false	Object	URIError
final	override	use
float	parseFloat	volatile
Function	parseInt	xml
generator	precission

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