Javascript keywords and reserved words

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The ECMA-262 defines a set of keywords supported by ECMAScript (keyword ).

These keywords identify the beginning and/or end of the ECMAScript statement. According to regulations, keywords are reserved and cannot be used as variable or function names.

The following is a complete list of ECMAScript keywords:

Break
Case
Catch
Continue
Default
Delete
Do
Else
Finally
For
Function
If
In
Instanceof
New
Return
Switch
This
Throw
Try
Typeof
Var
Void
While
With

Reserved Words are reserved words for future keywords. Therefore, reserved words cannot be used as variable or function names.

The complete list of reserved words is as follows:

Abstract
Boolean
Byte
Char
Class
Const
Debugger
Double
Enum
Export
Extends
Final
Float
Goto
Implements
Import
Int
Interface
Long
Native
Package
Private
Protected
Public
Short
Static
Super
Synchronized
Throws
Transient
Volatile

Note that when defining a variable, do not use the system keyword or reserved word for the variable name; otherwise, some inexplicable errors may occur!