Reserved words in JavaScript
Table of Contents
Question: What reserved words are there in JavaScript?
Answer:
Reserved words of the JavaScript langauge are listed below.
(Some of these words are actually used in the Java language,
and are reserved in JavaScript for compatibility purposes
or as possible extensions.)
When choosing names for your JavaScript variables,
avoid these reseved words!
| abstract | else | instanceof | switch |
| boolean | enum | int | synchronized |
| break | export | interface | this |
| byte | extends | long | throw |
| case | false | native | throws |
| catch | final | new | transient |
| char | finally | null | true |
| class | float | package | try |
| const | for | private | typeof |
| continue | function | protected | var |
| debugger | goto | public | void |
| default | if | return | volatile |
| delete | implements | short | while |
| do | import | static | with |
| double | in | super | |
In addition to the above reserved words, you'd better avoid
the following identifiers as names of JavaScript variables.
These are names of client-side objects, methods, or properties
in Netscape Navigator or Internet Explorer:
| alert | hidden | outerWidth |
| all | history | packages |
| anchor | image | pageXOffset |
| anchors | images | pageYOffset |
| area | isNaN | parent |
| array | java | parseFloat |
| assign | JavaArray | parseInt |
| blur | JavaClass | password |
| button | JavaObject | pkcs11 |
| checkbox | JavaPackage | plugin |
| clearTimeout | innerHeight | prompt |
| clientInformation | innerWidth | prototype |
| close | layer | radio |
| closed | layers | reset |
| confirm | length | screenX |
| crypto | link | screenY |
| date | location | scroll |
| defaultStatus | Math | secure |
| document | mimeTypes | select |
| element | name | self |
| elements | navigate | setTimeout |
| embed | navigator | status |
| embeds | netscape | String |
| escape | Number | submit |
| eval | Object | sun |
| event | offscreenBuffering | taint |
| fileUpload | onblur | text |
| focus | onerror | textarea |
| form | onfocus | top |
| forms | onload | toString |
| frame | onunload | unescape |
| frames | open | untaint |
| frameRate | opener | valueOf |
| function | option | window |
| getClass | outerHeight | |
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