Syntaxerror unexpected identifier

The syntaxerror unexpected identifier is an error message you’ll face when running your code in JavaScript.

If you are confused about how to resolve this error message, we understand you.

That’s the reason why we created this article for you.

In this article, we’ll show you the solution how to fix uncaught syntaxerror unexpected identifier error messages in Javascript.

If you want to get rid of this error, then keep on reading!

What is “syntaxerror unexpected identifier” error message?

The error message syntaxerror: unexpected identifier occurs when there’s a missing syntax in your code in JavaScript.

This error indicates that there is a typo or syntax error somewhere in your script.

Here’s an example code that results to this error message:

Incorrect code

var sampleString = myoldsampleString.replace ("username," visitorName);

As you can see, we have a simple error with this code regarding the comma (,) we use.

Corrected code

var sampleString = myoldsampleString.replace ("username", visitorName);

In addition to that, it happens when JavaScript encounters an unexpected identifier, such as a variable or function name, during the parsing phase.

Note: We should be more careful with our keywords because JavaScript is case-sensitive.

What are the root causes of “uncaught syntaxerror: unexpected identifier” in JavaScript?

This error can occur because of several factors, that include the following:

❌ Misspelling or typo in a keyword.

❌ Having an extra or missing a comma (,), semicolon (;), brackets ([ ]), quotes (” “), parentheses (), etc.

❌ Missing operator.

Note:  It’s always a good idea to double-check your code for typos or syntax errors when encountering this error message.

The following are the JavaScript keywords

✔ let

✔ class

✔ function

✔ const

These keywords must be written without any typos.

How to fix “syntaxerror unexpected identifier”?

To fix the uncaught syntaxerror: unexpected identifier error in js, you should carefully review your code to find the source of the error.

Once you have identified the source of the error, you can correct it by fixing the typo or syntax error.

Here are the following solutions you can use to resolve the error.

Solution 1: Check for typos

Ensure that all keywords and variable names are spelled correctly.

For example:

fuction myFunction() {

}

When you accidentally typed fuction instead of a function, it will cause this error.

Corrected code

✅ function myFunction() {
// code
}

Solution 2: Check for missing or mismatched parentheses, brackets, or braces

Ensure that all opening parentheses (, brackets [, and braces { have a matching closing character ), ], and } respectively.

For example:

if (a > 100 {
  
}

Corrected code

✅ if (a > 100) {

}

Solution 3: Check for missing or extra commas or semicolons

Ensure that all statements are properly terminated with a semicolon and that object properties and array elements are separated by commas.

For example:

var sampleObject = {
x: 10
y: 20
z: 30
};

Corrected code

✅ var sampleObject = {
x: 10,
y: 20,
z: 30
};

Solution 4: Check for invalid use of reserved words

Ensure that you are not using any JavaScript reserved words as a variable or function names.

For example:

var let = 100;

Corrected code

✅ var sampleLet = 100;

Conclusion

In conclusion, the error message syntaxerror: unexpected identifier occurs when there’s a missing syntax in your code in JavaScript.

This error indicates that there is a typo or syntax error somewhere in your script.

To fix the uncaught syntaxerror: unexpected identifier error in js, you should carefully review your code to find the source of the error.

This error message is easy to fix and understand, by executing the solutions above, you can master this SyntaxError with the help of this guide.

You could also check out other SyntaxError articles that may help you in the future if you encounter them.

• Syntaxerror invalid character in identifier 
• Syntaxerror: invalid decimal literal
• Syntaxerror: can’t assign to operator

We are hoping that this article helps you fix the error. Thank you for reading itsourcecoders 😊

Caren Bautista

Technical Writer at PIES IT Solution

Responsible for crafting clear, well-structured, and beginner-friendly content across the platform. Handles the writing, proofreading, and editorial review of tutorials, guides, and documentation to ensure every article is accurate, readable, and easy to follow.

Expertise: Technical Writing · Content Creation · Documentation · Editorial Writing · JavaScript · TypeScript · Python · Python Errors · HTTP Errors · MS Excel  · View all posts by Caren Bautista →