The @babel/plugin-proposal-private-methods package is a Babel plugin that allows developers to use the private methods and accessors proposal in JavaScript classes. This proposal is part of the ECMAScript (ES) standardization process and introduces a way to define private methods and getter/setter functions in a class, which are only accessible within the class itself.

What are @babel/plugin-proposal-private-methods's main functionalities?

Private Methods

This feature allows the definition of methods in a class that are not accessible from outside the class. The hash (#) prefix indicates that the method is private.

class MyClass {
  #privateMethod() {
    return 'Hello from private method';
  }

  publicMethod() {
    return this.#privateMethod();
  }
}

Private Accessors

This feature allows the definition of private getter and setter functions in a class, which can be used to control access to private fields.

class MyClass {
  #privateField = 'private value';

  get #privateAccessor() {
    return this.#privateField;
  }

  set #privateAccessor(newValue) {
    this.#privateField = newValue;
  }

  publicMethod() {
    return this.#privateAccessor;
  }
}

Other packages similar to @babel/plugin-proposal-private-methods

Changelog

Source

v7.18.6 (2022-06-27)

:eyeglasses: Spec Compliance

babel-parser
- #14650 [ts] Disallow property access after instantiation expression (@nicolo-ribaudo)
- #14636 [ts] Allow ...<...> followed by newline or binary operator (@nicolo-ribaudo)
babel-generator, babel-parser, babel-preset-env, babel-template
- #14668 JSON modules should be imported with default (@JLHwung)

:bug: Bug Fix

babel-helper-remap-async-to-generator, babel-plugin-proposal-async-generator-functions
- #14391 Transform await in computed class keys (@Yokubjon-J)
babel-plugin-transform-parameters
- #14694 fix: preserve function params type if possible (@magic-akari)
babel-core
- #14583 fix: Memory leak when deep cloning in babel-core (@liuxingbaoyu)
babel-core, babel-helper-check-duplicate-nodes, babel-plugin-bugfix-safari-id-destructuring-collision-in-function-expression, babel-plugin-bugfix-v8-spread-parameters-in-optional-chaining, babel-plugin-proposal-destructuring-private, babel-plugin-proposal-optional-chaining, babel-plugin-transform-runtime
- #14663 Fix import { types } from "@babel/core" with native ESM (@nicolo-ribaudo)

:house: Internal

babel-standalone
- #14697 Add proposal-unicode-sets-regex to @babel/standalone (@nicolo-ribaudo)
Other
- #14687 chore: Update bench baselines (@liuxingbaoyu)
babel-generator, babel-types
- #14685 enable TS compiler option: strictBindCallApply (@JLHwung)
babel-code-frame, babel-core, babel-generator, babel-helper-annotate-as-pure, babel-helper-builder-binary-assignment-operator-visitor, babel-helper-builder-react-jsx, babel-helper-check-duplicate-nodes, babel-helper-compilation-targets, babel-helper-create-class-features-plugin, babel-helper-create-regexp-features-plugin, babel-helper-define-map, babel-helper-explode-assignable-expression, babel-helper-fixtures, babel-helper-function-name, babel-helper-hoist-variables, babel-helper-member-expression-to-functions, babel-helper-module-imports, babel-helper-module-transforms, babel-helper-optimise-call-expression, babel-helper-plugin-test-runner, babel-helper-plugin-utils, babel-helper-remap-async-to-generator, babel-helper-replace-supers, babel-helper-simple-access, babel-helper-split-export-declaration, babel-helper-transform-fixture-test-runner, babel-helper-validator-option, babel-helper-wrap-function, babel-helpers, babel-highlight, babel-plugin-bugfix-v8-spread-parameters-in-optional-chaining, babel-plugin-external-helpers, babel-plugin-proposal-async-generator-functions, babel-plugin-proposal-class-static-block, babel-plugin-proposal-decorators, babel-plugin-proposal-destructuring-private, babel-plugin-proposal-function-bind, babel-plugin-proposal-function-sent, babel-plugin-proposal-json-strings, babel-plugin-proposal-object-rest-spread, babel-plugin-proposal-optional-chaining, babel-plugin-proposal-partial-application, babel-plugin-proposal-pipeline-operator, babel-plugin-proposal-private-property-in-object, babel-plugin-proposal-record-and-tuple, babel-plugin-syntax-typescript, babel-plugin-transform-block-scoped-functions, babel-plugin-transform-block-scoping, babel-plugin-transform-classes, babel-plugin-transform-computed-properties, babel-plugin-transform-destructuring, babel-plugin-transform-duplicate-keys, babel-plugin-transform-exponentiation-operator, babel-plugin-transform-flow-comments, babel-plugin-transform-flow-strip-types, babel-plugin-transform-for-of, babel-plugin-transform-function-name, babel-plugin-transform-modules-amd, babel-plugin-transform-modules-commonjs, babel-plugin-transform-modules-systemjs, babel-plugin-transform-modules-umd, babel-plugin-transform-object-super, babel-plugin-transform-parameters, babel-plugin-transform-property-mutators, babel-plugin-transform-proto-to-assign, babel-plugin-transform-react-constant-elements, babel-plugin-transform-react-display-name, babel-plugin-transform-react-inline-elements, babel-plugin-transform-react-jsx-compat, babel-plugin-transform-react-jsx-source, babel-plugin-transform-react-jsx, babel-plugin-transform-runtime, babel-plugin-transform-typescript, babel-plugin-transform-unicode-escapes, babel-preset-env, babel-preset-typescript, babel-standalone, babel-template, babel-traverse, babel-types
- #14601 enable noImplicitAny (@JLHwung)
babel-core, babel-helper-transform-fixture-test-runner, babel-plugin-transform-destructuring
- #14659 Run Babel asynchronously in fixtures (@nicolo-ribaudo)

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Source