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

• How to use Environmental Variables in NodeJS
• How to Check if Object is Empty in JavaScript
• Javascript loops: for vs forEach vs for.. in vs for.. of
• Javascript Types
• How to select HTML elements in Javascript
• What are the three dots (...) or spread operator in Javascript?
• Javascript Proxy: Using Javascript Proxies like a Pro
• How to Make Payments with the Javascript Payments API
• Javascript Errors
• The Complete Guide to JavaScript Set Type