eslint error parsing error: the keyword 'const' is reserved

ESLint Error: Parsing Error: The Keyword 'const' is Reserved#

If you're a JavaScript developer, chances are you've come across the keyword 'const' at some point. It's a new way of declaring variables that was added in ECMAScript 6 (ES6) and is now widely used by developers. However, if you're using ESLint to check your code for errors, you may have encountered an error that says "Parsing Error: The Keyword 'const' is Reserved." This error occurs when you try to use the 'const' keyword in a version of JavaScript that doesn't support it.

What is ESLint?#

ESLint is a static code analysis tool that helps identify potential errors and bugs in your JavaScript code. It checks your code against a set of rules to ensure that it conforms to best practices and standards. ESLint is highly configurable, allowing you to customize the rules to fit your specific needs.

Why am I getting this error?#

The error "Parsing Error: The Keyword 'const' is Reserved" occurs when you try to use the 'const' keyword in a version of JavaScript that doesn't support it. This usually happens when you're using an older version of JavaScript or your code is being transpiled to an older version of JavaScript.

How to fix the error?#

If you're using an older version of JavaScript, you can fix the error by upgrading to a newer version that supports the 'const' keyword. Alternatively, if you're using a transpiler like Babel, you can configure it to transpile your code to a version of JavaScript that supports 'const'.

To fix the error using Babel, add the following configuration to your .babelrc file:

{
  "presets": [
    [
      "@babel/env",
      {
        "targets": {
          "node": "current"
        }
      }
    ]
  ]
} 

This configuration tells Babel to transpile your code to the version of JavaScript that's supported by the current version of Node.js.

In conclusion, the "Parsing Error: The Keyword 'const' is Reserved" error occurs when you try to use the 'const' keyword in an older version of JavaScript that doesn't support it. To fix this error, upgrade to a newer version of JavaScript or configure your transpiler to transpile your code to a version of JavaScript that supports 'const'.