W3C.US

  • Increase font size
  • Default font size
  • Decrease font size
Home Tutorial Javascript Book Reserved Words

Reserved Words

E-mail Print PDF

In ECMAScript v5, javascript's reserved words are 3 parts: keywords, future reserved words, predefined global variable and function.

Keywords:

Javascript Keywords
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        

Future reserved words:

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

Predefined tokens:

Javascript Pre-defined Tokens
arguments encodeURI Infinity Object String Array
Error isFinite parseFloat SyntaxError Boolean escape
isNaN parseInt TypeError Date eval Math
RangeError undefined decodeURI EvalError NaN ReferenceError
unescape decodeURIComponent Function Number RegExp URIError
encodeURIComponent          

When you name your function or variable, avoid these tokens.