if you like programming in javascript you will find out that there are some words that need to be reserved for your programming. there are some words you cannot use these are my list of do not use:

so keep this rule when naming your variables is to avoid the use of javascript reserved words. these are special words that are used for specific purpose in javasscript. for example, you've learned that the reserved word var is used to declare a javascript variable. using it as a variable name can cause numberous problesm in your scripts, since this word is meant to be used in a different way. the next table lists the reserved words in javascript. note that tall these words are used so they will become more familiar to you as you start to code more javascript.

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