@babel/helper-replace-supers is a Babel helper module that assists in handling super method calls and super property accesses in JavaScript classes. It is particularly useful when transforming ES6+ code to ES5, ensuring that the semantics of super calls are preserved correctly.

What are @babel/helper-replace-supers's main functionalities?

Super Method Call Replacement

This feature allows you to replace super method calls within a class method. The `replaceSuper` function is used to handle the transformation, ensuring that the correct object and super references are maintained.

const { replaceSuper } = require('@babel/helper-replace-supers');

function replaceSuperMethodCall(path, state) {
  replaceSuper(path, state, {
    getObjectRef() {
      return path.node.object;
    },
    getSuperRef() {
      return path.node.super;
    },
    file: state.file
  });
}

Super Property Access Replacement

This feature allows you to replace super property accesses within a class. Similar to method call replacement, the `replaceSuper` function ensures that property accesses are correctly transformed.

const { replaceSuper } = require('@babel/helper-replace-supers');

function replaceSuperPropertyAccess(path, state) {
  replaceSuper(path, state, {
    getObjectRef() {
      return path.node.object;
    },
    getSuperRef() {
      return path.node.super;
    },
    file: state.file
  });
}

Other packages similar to @babel/helper-replace-supers

Changelog

Source

v7.16.0 (2021-10-30)

:eyeglasses: Spec Compliance

babel-helpers, babel-plugin-proposal-async-generator-functions, babel-runtime-corejs2, babel-runtime-corejs3, babel-runtime
- #13824 Await promises from sync iterators with for-await (@nicolo-ribaudo)

:rocket: New Feature

babel-generator, babel-parser, babel-plugin-transform-typescript, babel-types
- #13802 Support TypeScript 4.5 type-only import/export specifiers (@sosukesuzuki)
babel-parser
- #13887 feat: support startColumn option (@JLHwung)
babel-helper-fixtures, babel-helper-transform-fixture-test-runner, babel-parser, babel-plugin-syntax-typescript, babel-preset-typescript
- #13838 Handle .mts and .cts files in @babel/preset-typescript (@nicolo-ribaudo)
Other
- #13782 Add ESLint 8 support to @babel/eslint-parser (@nicolo-ribaudo)
babel-generator, babel-parser, babel-plugin-proposal-pipeline-operator, babel-plugin-syntax-pipeline-operator
- #13749 Caret topic (pipe operator) (@js-choi)
babel-compat-data, babel-generator, babel-parser, babel-preset-env, babel-types
- #13713 Enable class static blocks by default (@sosukesuzuki)
babel-helper-skip-transparent-expression-wrappers, babel-plugin-proposal-optional-chaining
- #13687 add skipTransparentExprWrapperNodes helper (@lightmare)
babel-traverse, babel-types
- #13666 Add aliases for Standardized, TypeScript, and Flow (@jridgewell)

:bug: Bug Fix

babel-parser, babel-plugin-transform-typescript
- #13876 [ts] Support private methods overloads (@nicolo-ribaudo)
babel-plugin-transform-typescript
- #13865 fix: allow enum member without initializer after non-literal member (@lightmare)
babel-core, babel-helper-create-class-features-plugin, babel-plugin-transform-typescript
- #13854 Don't transform declare class in plugin-proposal-class-properties (@forivall)
babel-compat-data, babel-plugin-bugfix-safari-id-destructuring-collision-in-function-expression, babel-plugin-bugfix-v8-spread-parameters-in-optional-chaining, babel-plugin-transform-react-constant-elements, babel-preset-env, babel-traverse
- #13842 Implement @babel/plugin-bugfix-safari-id-destructuring-collision-in-function-expression (@JLHwung)
babel-plugin-proposal-async-generator-functions, babel-traverse
- #13813 Restore traversal context after enter / traverse (@JLHwung)
babel-traverse, babel-types
- #13832 Mark static block as FunctionParent (@JLHwung)
babel-generator
- #13825 Fix missing inner comments in function expressions (@overlookmotel)

:house: Internal

Every package
- #13772 Use workspace:^ to specify @babel/ dependencies (@nicolo-ribaudo)
Other
- #13856 Update to Yarn 3.1 (@nicolo-ribaudo)
- #13867 Test on Node.js 17 (@nicolo-ribaudo)
babel-helper-fixtures, babel-plugin-proposal-class-properties, babel-plugin-transform-runtime, babel-preset-react
- #13858 Force loading plugins/presets from the monorepo in tests (@nicolo-ribaudo)
babel-types
- #13844 [ts] precise return type on createTypeAnnotationBasedOnTypeof (babel-types) (@lightmare)
babel-helpers
- #13841 minor: remove ineffectual helper names filter (@lightmare)
babel-core, babel-plugin-transform-react-jsx-development, babel-plugin-transform-react-jsx, babel-types
- #13820 Improve transform-react-jsx typings (@JLHwung)

:running_woman: Performance

babel-types
- #13843 Simplify (transpiled) babel-types builder wrappers (@lightmare)

Readme

Source