What babel preset is needed and how to connect it?

Question

npm

.babelrc

{
  "presets": [
    "@babel/preset-env"
  ],
  "plugins": [
    "@babel/plugin-syntax-dynamic-import",
    "@babel/plugin-syntax-import-meta",
    ["@babel/plugin-proposal-class-properties", { "loose": false }],
    "@babel/plugin-proposal-json-strings"
  ]
}

rules

module: {
    rules: [
        {
            test: /\.js$/,
            loader: 'babel-loader'
        }
    ]
},

code

class Something {
    #property;

    constructor() {
        this.#property = "test";
    }
}

const instance = new Something();
console.log(instance.property);

does not understand the private property .. and from core-js I don’t know where to import

Answer 1

If you are using babel version 7, then the stage-3 preset and the others are marked as deprecated. https://babeljs.io/docs/en/babel-preset-stage-3
There is also a link to the documentation on what to do https://github.com/babel/babel/blob/master/package...