@babel/plugin-proposal-class-properties

This plugin is included in @babel/preset-env, in ES2022

Below is a class with four class properties which will be transformed.

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class Bork {
  //Property initializer syntax
  instanceProperty = "bork";
  boundFunction = () => {
    return this.instanceProperty;
  };

  //Static class properties
  static staticProperty = "babelIsCool";
  static staticFunction = function() {
    return Bork.staticProperty;
  };
}