How to Fix \'Unexpected Token Export\' Error When Running ES6 Code?

"Troubleshooting Unexpected Token Export Error"

When attempting to execute ES6 code within a project, an "unexpected token export" error may arise. This error indicates that the environment used does not support the export keyword syntax employed in ES6 modules.

Error Details

The following code snippet exemplifies the source of the error:

export class MyClass {
  constructor() {
    console.log("es6");
  }
}

Possible Solutions

To resolve this issue, consider the following solutions:

1. Node.js Version and Configuration

If using Node.js v14.13.0 or newer:

• Enable ESM by adding "type": "module" in the project's package.json file.

If using an older version of Node.js:

• Refactor the code to use CommonJS Module syntax (e.g., using module.exports).

2. TypeScript with Instant Transpilation

• Use TypeScript with ts-node or ts-node-dev packages for instant transpilation during development.

3. Transpilation Using esbuild

• Transpile ES6 code to CommonJS format using the esbuild package.

4. Babel (Not Recommended)

• Transpilation using Babel is no longer recommended due to potential performance limitations.

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