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

• Javascript Records and Tuples
• A Complete Guide to Javascript Maps
• An Introduction to Javascript
• Generating a Sitemap with Node.JS and Javascript Automatically
• Resolving HTTP Cannot set headers after they are sent to the client in Node.JS
• Javascript ShadowRealms
• Websockets Tutorial: Creating a real-time Websocket Server
• Using the New Google Analytics API to Get Most Popular Pages
• What are the three dots (...) or spread operator in Javascript?
• Javascript Dates and How they Work