JavaScript Keywords

The following table of keywords should never be used as identifiers (i.e.: variable names) in JavaScript. The primary ones discussed on this site are linked to their official MDN documentation.

• await
• break
• case
• catch
• class
• const
• continue
• debugger
• default
• delete
• do
• else
• enum
• export
• extends
• false
• finally
• for
• function
• if
• implements
• import
• in
• instanceof
• interface
• let
• new
• null
• return
• static
• super
• switch
• this
• throw
• true
• try
• typeof
• var
• void
• while
• with
• yield

The MDN site contains a more complete discussion of JavaScript keywords