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@babel/plugin-proposal-destructuring-private

Transforms private destructuring var { #y: y } = this to var y = this.#y.

Example​

JavaScript
class Foo {
  x;
  #y;
  equalsTo({ x, #y: y }) {
    return this.x === x && this.#y === y;
  }
}

will be transformed to

JavaScript
class Foo {
  x;
  #y;
  equalsTo(_p) {
    var { x } = _p, y = _p.#y;
    return this.x === x && this.#y === y;
  }
}

The plugin respects these compiler assumptions:

Installation​

npm install --save-dev @babel/plugin-proposal-destructuring-private

Usage​

babel.config.json
{
  "plugins": ["@babel/plugin-proposal-destructuring-private"]
}

Because the output code includes private fields, if you are already using other class feature plugins (e.g. `@babel/plugin-transform-class-properties), be sure to place it before the others.

babel.config.json
{
  "plugins": [
    "@babel/plugin-proposal-destructuring-private",
    "@babel/plugin-transform-class-properties"
  ]
}

Via CLI​

Shell
babel --plugins @babel/plugin-proposal-destructuring-private script.js

Via Node API​

JavaScript
require("@babel/core").transformSync("code", {
  plugins: ["@babel/plugin-proposal-destructuring-private"],
});

References​