JavaScript SyntaxError: unexpected token in script

Missing or mismatched braces, brackets, or parentheses in JavaScript code blocks, particularly in if statements, functions, or object definitions. (high likelihood)

Using ES6+ arrow function syntax (=>) in client scripts or catalog client scripts which run in older JavaScript engines that only support ES5. (high likelihood)

Template literals using backticks (`) instead of single or double quotes in environments that don't support ES6 template literals. (medium likelihood)

Incorrect use of reserved JavaScript keywords as variable names or function names, such as 'class', 'const', or 'let' in ES5 contexts. (medium likelihood)

Malformed regular expressions or string literals with unescaped special characters or incorrect quotation mark usage. (low likelihood)

Step 1: Navigate to System Diagnostics > Log > Application Log to find the exact line number and script location where the syntax error occurred.

Step 2: Open the problematic script record (Business Rule, Client Script, UI Policy, etc.) and locate the line mentioned in the error message.

Step 3: Check for missing or mismatched braces, brackets, and parentheses by counting opening and closing pairs in the script.

Step 4: Replace any ES6+ syntax like arrow functions (=>) with traditional function declarations if the script runs client-side or in older environments.

Step 5: Convert template literals (backticks) to string concatenation using single or double quotes if ES6 is not supported in the execution context.

Step 6: Validate that all string literals are properly quoted and escape any special characters that might break the syntax.

Step 7: Use the Script Debugger or browser developer tools to test the corrected syntax before saving the script record.

Step 8: Clear the browser cache and test the functionality to ensure the syntax error is resolved and the script executes properly.