Unexpected identifier javascript – How to Fix Unexpected identifier Error in JavaScript?

Unexpected identifier javascript: Uncaught syntaxerror unexpected identifier javascript, Uncaught syntaxerror unexpected identifier node js, Javascript error unexpected identifier selenium, Unexpected identifier mysql, Syntax error unexpected identifier php, Unexpected identifier jquery, Uncaught syntaxerror unexpected token are solved by the errors with two reasons.

The error “Uncaught SyntaxError: Unexpected identifier” occurs for two reasons:

• Misspelling a keyword, for example, Let or Class instead of let and class
• Including a missing or extra comma, parentheses, quote, or bracket in your code.

Let us see some of the cases how does this error occur

NOTE:

You can compile the below codes in any online complier or vs code etc for more clarity

1)Giving ‘Let’ instead of ‘let’ keyword

// Here we gave Let insted of let. So, the 
// SyntaxError: Unexpected identifier occurs
Let EmpId = 1254; 

Output:

Let EmpId = 1254; 
^^^^^

SyntaxError: Unexpected identifier
at Module._compile (internal/modules/cjs/loader.js:723:23)
at Object.Module._extensions..js (internal/modules/cjs/loader.js:789:10)
at Module.load (internal/modules/cjs/loader.js:653:32)
at tryModuleLoad (internal/modules/cjs/loader.js:593:12)
at Function.Module._load (internal/modules/cjs/loader.js:585:3)
at Function.Module.runMain (internal/modules/cjs/loader.js:831:12)
at startup (internal/bootstrap/node.js:283:19)
at bootstrapNodeJSCore (internal/bootstrap/node.js:623:3)

2) Giving ‘Class’ instead of ‘class’ keyword

// Here we gave Let 'Class' instead of class. So, the 
// SyntaxError: Unexpected identifier occurs
Class Employ { 
    
}

Output:

Class Employ { 
^^^^^^

SyntaxError: Unexpected identifier
at Module._compile (internal/modules/cjs/loader.js:723:23)
at Object.Module._extensions..js (internal/modules/cjs/loader.js:789:10)
at Module.load (internal/modules/cjs/loader.js:653:32)
at tryModuleLoad (internal/modules/cjs/loader.js:593:12)
at Function.Module._load (internal/modules/cjs/loader.js:585:3)
at Function.Module.runMain (internal/modules/cjs/loader.js:831:12)
at startup (internal/bootstrap/node.js:283:19)
at bootstrapNodeJSCore (internal/bootstrap/node.js:623:3)

3) Giving ‘Function’ instead of ‘function’ keyword

// Here we gave Let 'Function' instead of 'function'. So, the 
// SyntaxError: Unexpected identifier occurs
Function multiply(x, y) { 
  return x * y;
}

Output:

Function multiply(x, y) { 
^^^^^^^^

SyntaxError: Unexpected identifier
at Module._compile (internal/modules/cjs/loader.js:723:23)
at Object.Module._extensions..js (internal/modules/cjs/loader.js:789:10)
at Module.load (internal/modules/cjs/loader.js:653:32)
at tryModuleLoad (internal/modules/cjs/loader.js:593:12)
at Function.Module._load (internal/modules/cjs/loader.js:585:3)
at Function.Module.runMain (internal/modules/cjs/loader.js:831:12)
at startup (internal/bootstrap/node.js:283:19)
at bootstrapNodeJSCore (internal/bootstrap/node.js:623:3)

4)Missing comma(,)

const object = {
  // Here we missed a comma(,) to separate each key-value pair.
  // So, the  SyntaxError: Unexpected identifier occurs
  EmpName: 'Nick' 
  EmpId: 4256
};

Output:

EmpId: 4256
^^^^^

SyntaxError: Unexpected identifier
at Module._compile (internal/modules/cjs/loader.js:723:23)
at Object.Module._extensions..js (internal/modules/cjs/loader.js:789:10)
at Module.load (internal/modules/cjs/loader.js:653:32)
at tryModuleLoad (internal/modules/cjs/loader.js:593:12)
at Function.Module._load (internal/modules/cjs/loader.js:585:3)
at Function.Module.runMain (internal/modules/cjs/loader.js:831:12)
at startup (internal/bootstrap/node.js:283:19)
at bootstrapNodeJSCore (internal/bootstrap/node.js:623:3)

The first and second cases indicate how a keyword misspelling generates an error. Generally, the keywords are case-sensitive.

You can validate your code by pasting it into an online Syntax Validator/online javascript compiler. The validator should be able to tell you which line has the error.

Alternatively, use your browser’s Console tab to find the line in which the error occurred.

Fixing Unexpected identifier Error in JavaScript

Unexpected identifier js: A great way to start is around the line where the problem occurred and look for:

• Let, Const, Class, or Function are all misspelled or incorrect keywords.
• Check if we are missing any colon, comma, bracket, parenthesis, or quote.
• Also, see if we are giving an extra colon, comma, bracket, parenthesis, or quote.

To resolve the “Uncaught SyntaxError: Unexpected identifier” error, check for misspelled keywords, such as Let or Function instead of let and function, and correct any mistakes relating to missing or additional commas, colons, parenthesis, quotes, or brackets.

Let us now fix the above examples one by one to avoid SyntaxError: Unexpected identifier Error

index.js:

// Give let keyword NOT Let
let EmpId = 1254; 

// Give class keyword NOT Class
class Employ { 
    
}

// Give function NOT Function
function multiply(x, y) { 
  return x * y;
}

const object = {
  // Give a comma to separate each key-value pair
  EmpName: 'Nick',
  EmpId: 4256
};

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