JavaScript Reserved Words
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The following are reserved words in JavaScript. These words MUST NOT be used in a script as JavaScript has reserved these words for use within the JavaScript internal structure. They cannot be used as JavaScript variables, functions, methods, loop labels, or object names. Unanticipated results will probably occur and cause unknown errors. The last selection is a compilation of general script protected and reserved words you should also avoid in your scripts. Updated 9/2009


JavaScript Reserved Words

break continue do for import new this void
case default else function in return typeof while
comment delete export if label switch var with

Java Keywords (Reserved by JavaScript)

abstract implements protected
boolean instanceOf public
byte int short
char interface static
double long synchronized
false native throws
final null transient
float package true
goto private  

ECMAScipt Reserved Words

catch enum throw
class extends try
const finally  
debugger super  

Other JavaScript Keywords

alert eval Link outerHeight scrollTo
Anchor FileUpload location outerWidth Select
Area find Location Packages self
arguments focus locationbar pageXoffset setInterval
Array Form Math pageYoffset setTimeout
assign Frame menubar parent status
blur frames MimeType parseFloat statusbar
Boolean Function moveBy parseInt stop
Button getClass moveTo Password String
callee Hidden name personalbar Submit
caller history NaN Plugin sun
captureEvents History navigate print taint
Checkbox home navigator prompt Text
clearInterval Image Navigator prototype Textarea
clearTimeout Infinity netscape Radio toolbar
close innerHeight Number ref top
closed innerWidth Object RegExp toString
confirm isFinite onBlur releaseEvents unescape
constructor isNan onError Reset untaint
Date java onFocus resizeBy unwatch
defaultStatus JavaArray onLoad resizeTo valueOf
document JavaClass onUnload routeEvent watch
Document JavaObject open scroll window
Element JavaPackage opener scrollbars Window
escape length Option scrollBy  

General Script Protected Words In Browsers

abstract
boolean
break
byte
case
catch
char
class
const
continue
debugger
default
delete
do
double
else
enum
export
extends
false
final
finally
float
for
function
goto
if
implements
import
in
instanceof
int
interface
long
native
new
null
package
private
protected
public
return
short
static
super
switch
synchronized
this
throw
throws
transient
true
try
typeof
var
void
volatile
while
with


JavaScript Reserved Words

Be careful NOT to use these words as JavaScript variables, functions, methods, loop labels, or object names. There is no need to view the source.



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