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@babel/helper-create-class-features-plugin

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    @babel/helper-create-class-features-plugin

Compile class public and private fields, private methods and decorators to ES6


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Maintainers
4
Install size
5.00 MB
Created

Package description

What is @babel/helper-create-class-features-plugin?

The @babel/helper-create-class-features-plugin is a helper package used internally by Babel plugins to handle the transformation of class features. It is not intended to be used directly by end users, but rather as a utility for plugin authors to create transformations for class properties, private methods, and other class-related syntax in a consistent way.

What are @babel/helper-create-class-features-plugin's main functionalities?

Class Properties

This feature allows the transformation of class properties so that they can be compiled into a format that is compatible with environments that do not support the latest ECMAScript standards. The code sample shows how a class property is transformed into a constructor assignment with a helper function.

"use strict";

function _defineProperty(obj, key, value) {
  if (key in obj) {
    Object.defineProperty(obj, key, { value: value, enumerable: true, configurable: true, writable: true });
  } else {
    obj[key] = value;
  }
  return obj;
}

class Example {
  constructor() {
    _defineProperty(this, "state", {});
  }
}

Private Methods

This feature enables the transformation of private methods in a class. The code sample illustrates how a private method is transformed using WeakSets and helper functions to ensure that the method remains private and is not accessible outside the class.

"use strict";

function _classPrivateMethodInitSpec(obj, privateSet) {
  // ...implementation details
}

function _classPrivateMethodGet(receiver, privateSet, fn) {
  // ...implementation details
}

class Example {
  constructor() {
    _classPrivateMethodInitSpec(this, _privateMethod);
  }
}

var _privateMethod = new WeakSet();

Other packages similar to @babel/helper-create-class-features-plugin

Changelog

Source

v7.24.4 (2024-04-03)

:eyeglasses: Spec Compliance
  • babel-parser
    • #16403 Forbid initializerless using (@JLHwung)
  • babel-helpers, babel-plugin-proposal-decorators, babel-runtime-corejs3
:bug: Bug Fix
  • babel-generator
  • babel-compat-data, babel-plugin-bugfix-firefox-class-in-computed-class-key, babel-preset-env
  • babel-helper-create-class-features-plugin, babel-plugin-proposal-decorators
  • babel-plugin-transform-block-scoping
  • babel-core, babel-plugin-transform-block-scoped-functions, babel-plugin-transform-block-scoping

Readme

Source

@babel/helper-create-class-features-plugin

Compile class public and private fields, private methods and decorators to ES6

See our website @babel/helper-create-class-features-plugin for more information.

Install

Using npm:

npm install --save @babel/helper-create-class-features-plugin

or using yarn:

yarn add @babel/helper-create-class-features-plugin

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Last updated on 03 Apr 2024

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