Why Isn't My Babel Transformation Working?

Babel Transformation Not Occurring

In your code, you're encountering an issue where the Babel transformation is not occurring when you try to compile proxy.js into proxified.js. This results in the output file being a copy of the source file, instead of being compiled.

To resolve this issue, you need to configure Babel with the transformations you want to apply. By default, Babel 6.x does not perform any transformations without explicit configuration.

To enable the necessary transformations, follow these steps:

1. Install the babel-preset-env package:

npm install babel-preset-env

2. Run Babel with the --presets flag:

babel --presets env proxy.js --out-file proxified.js

Alternatively, you can create a .babelrc file in your project directory with the following content:

{
    "presets": [
        "env"
    ]
}

This configuration tells Babel to use the env preset, which compiles standard ES* features to ES5.

If you're using Node versions that support some ES6 features, you can customize the preset by specifying the target Node version. For example:

{
    "presets": [
        ["env", { "targets": { "node": "true" } }],
    ]
}

This configuration ensures that only features not supported by your Node version are compiled. You can also include browser versions in your targets if you need browser support.

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