JavaScript Linter

JavaScript Code Linter

Analyze your JavaScript code for syntax errors, best practices, and modern ES6+ standards.

JavaScript Code

Lint Results

Enter JavaScript code above and click "Lint JavaScript Code" to see results

What We Check

Modern Syntax:

let/const usage, arrow functions, template literals

Best Practices:

Strict equality, semicolons, variable declarations

Security Issues:

eval() usage, potential vulnerabilities

Code Quality:

Console statements, undefined variables

JavaScript Best Practices

Use let/const:

Avoid var, prefer const for immutable values

Strict equality:

Use === and !== instead of == and !=

Semicolons:

Always end statements with semicolons

Error handling:

Use try-catch blocks and proper error handling