JavaScript SyntaxError - Missing ':' after property id

JavaScript SyntaxError “variable” is a reserved identifier

Last Updated : 22 May, 2023

This JavaScript exception variable is a reserved identifier occurs if the reserved keywords are used as identifiers.

Message:

SyntaxError: The use of a future reserved word for an identifier is invalid (Edge) SyntaxError: “x” is a reserved identifier (Firefox) SyntaxError: Unexpected reserved word (Chrome)

Error Type:

SyntaxError

What happened?

When Reserved keywords are used as identifiers they will throw an error. enum is reserved in both strict and sloppy modes. while the following keywords are reserved in strict mode.

implements
package
public
interface
private
protected
let
static

Example 1: The package is an identifier in strict mode, So it will work fine here.

Javascript

let package = "This is GeeksForGeeks";
console.log(package);

Output:

This is GeeksForGeeks

Example 2: The enum is an identifier, So it will throw SyntaxError.

Javascript

let enum = "This is GeeksForGeeks";
console.log(enum);

Output:

SyntaxError: Unexpected reserved word

JavaScript SyntaxError - Missing ':' after property id

PranchalKatiyar

Improve

Article Tags :

JavaScript SyntaxError “variable” is a reserved identifier

Javascript

Javascript

Similar Reads

JS Range Error

JS Reference Error

JS Syntax Error

JS Type Error

JS Other Errors

JS Error Instance

Thank You!

What kind of Experience do you want to share?