SyntaxError: Unexpected token
This error matches known, documented patterns with reliable solutions.
Quick Fix (Most Common Solution)
- Check the line number mentioned in error
- Update Node.js to latest LTS
Seeing "SyntaxError: Unexpected token"? This error can be frustrating, but it's usually fixable. It typically affects your development workflow or system. Below you'll find clear, step-by-step solutions to resolve this issue.
What This Error Means
The JavaScript parser encountered an unexpected character or keyword.
Frequently documented in developer and vendor support forums.
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Common Causes
- Typo in code
- Using ES6+ in old Node version
- Missing semicolon or bracket
How to Fix
- Check the line number mentioned in error
- Update Node.js to latest LTS
- Use a linter like ESLint
Last reviewed: June 2026 How we review solutions
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Version Notes
Node.js Version Changes That Affect Node Syntaxerror Unexpected Token
Node Syntaxerror Unexpected Token to appear in previously-working code. Understanding which Node.js version introduced the relevant change is the fastest path to a fix.
Key breaking changes by version: Node.js 12 added ES2019 support and improved error messages — code relying on old error message text in catch blocks may break. Node.js 14 marked CommonJS/ESM interoperability as stable. Node.js 15 made UnhandledPromiseRejection a hard crash (previously a warning). Node.js 18 changed fetch to be built-in and updated the V8 version to require newer OpenSSL — NODE_OPTIONS=--openssl-legacy-provider works around OpenSSL errors from older tooling. Node.js 20 moved to the current LTS line with stable test runner APIs. Always check the Node.js Changelog for the exact version boundary when a runtime error appears after an upgrade. Use .nvmrc to pin the Node version and engines in package.json to communicate the requirement to other developers.Optional follow-up
Some users ask whether saving fixes for recurring errors would be useful when the same issue appears again.
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Frequently Asked Questions
What causes unexpected token?
Usually a typo, missing bracket, or unsupported syntax for your Node version.
How do I support ES modules?
Add "type": "module" to package.json or use .mjs extension.
Related Resources
Also Known As
- Node.js error
- Node runtime error
- JavaScript server error
- Node exception
Common Search Variations
- "node js error fix"
- "node command not working"
- "node app crashing"
- "javascript server error solution"
- "node runtime crash fix"
- "how to debug node error"
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