Javascript

Javascript Reserved Keywords

When writing code, a reserved keyword is one you can't use as the name of a variable or identifier. As of 2022, this is the full list of valid reserved keywords in Javascript.

All Javascript Reserved Keywords

The below list cannot be used as variable names, as they are reserved keywords. Most of them have current functionality in Javascript. Some do not, but they are words which may have some sort of functionality in the future. Avoid using these words in variable names.

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

More Tips and Tricks for Javascript

• Changing HTML Classes and Attributes in Javascript
• Javascript Add Event Listener to Multiple Elements
• A Look at the New Array Methods coming to Javascript
• How JSON works in Javascript
• Types may be coming to Javascript
• Import, Export and Require in Javascript
• Javascript ShadowRealms
• Javascript Promise.all() - Everything you need to know
• Asynchronous Operations in Javascript
• How to remove a specific item from an array