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

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• Waiting for the DOM to be ready in Javascript
• Javascript Temporal and How it Works
• Javascript Operators and Expressions
• How does Optional Chaining work in Javascript?
• Javascript Array Slice Method
• Javascript: Check if an Array is a Subset of Another Array
• Javascript loops: for vs forEach vs for.. in vs for.. of
• Javascript Array Every Method
• Javascript Functions