JavaScript Reserved Words

In JavaScript you cannot use these reserved words as variables, labels, or function names: abstract arguments async * await * boolean break byte case catch char class *

eval export * extends * false final finally float for function goto if implements function import *

switch synchronized this throw throws transient true try typeof using *

You can read more the newest JavaScript versions in

abstract boolean byte char double final float goto int long native short synchronized throws transient volatile JavaScript Objects, Properties, and Methods You should also avoid using the name of

isPrototypeOf length

name

JavaScript is often used together with Java. You should avoid using some Java objects and properties as JavaScript identifiers: getClass java

JavaScript can be used as the programming language in many applications. You should also avoid using the name of HTML and Window objects and properties: alert all anchor anchors area assign blur button checkbox clearInterval clearTimeout clientInformation close closed confirm constructor crypto decodeURI decodeURIComponent defaultStatus document element elements embed embeds encodeURI encodeURIComponent escape event fileUpload focus form forms frame innerHeight innerWidth layer layers link location mimeTypes navigate navigator frames frameRate hidden history image images offscreenBuffering open opener option outerHeight outerWidth packages pageXOffset pageYOffset parent parseFloat parseInt password pkcs11 plugin prompt propertyIsEnum radio reset screenX screenY scroll secure select self setInterval setTimeout status submit taint text textarea top unescape untaint window

In addition you should avoid using the name of all HTML event handlers.

onblur onclick onerror onfocus onkeydown onkeypress onkeyup onmouseover onload onmouseup onmousedown onsubmit