JavaScript has a number of “reserved words,” or words that have special meaning in the language. You should avoid using these words in your code except when using them with their intended meaning.

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