How to transform js code for old version of node.js?

Question

JavaScript

I am using the following webpack config.
Babel preset set to node.js 6.10 compatibility mode

const path = require('path');
module.exports = {
    entry: './src/index.js',
    module: {
        rules: [
            {
                test: /\.(js)$/,
                use: {
                    loader: 'babel-loader',
                    options: {
                        presets: ['@babel/preset-env', {
                            targets: {
                                node: '6.10'
                            }
                        }]
                    }
                }
            }
        ]
    },
    output: {<code lang="javascript">

</code>
        path: path.resolve(__dirname, 'dist'),
        filename: 'index_bundle.js'
    },
    mode: 'production'//process.env.NODE_ENV === 'production' ? 'production' : 'development'
}

Source:

const promise1 = Promise.resolve(3);
const promise2 = new Promise((resolve, reject) => setTimeout(reject, 100, 'foo'));
const promises = [promise1, promise2];

Promise.allSettled(promises).
then((results) => results.forEach((result) => console.log(result.status)));

After transformation:

(()=>{var e=[Promise.resolve(3),new Promise((function(e,o){return setTimeout(o,100,"foo")}))];Promise.allSettled(e).then((function(e){return e.forEach((function(e){return console.log(e.status)}))}))})();

However, after the transformation, the Promise.allSettled method remained, which is not in node version 6.10.
How to fix it?

Answer 1

In theory, preset-env should automatically include a polyfill for this case from core.js.
Here they say that yes it should be in the modern version.

'@babel/preset-env', {
    useBuiltIns: 'usage',
    corejs: {version: 3, proposals: true},
}