@babel/helper-member-expression-to-functions

What is @babel/helper-member-expression-to-functions?

The @babel/helper-member-expression-to-functions package is a Babel helper that transforms member expressions to functions. It is used internally by Babel plugins to handle transformations of member expressions in a consistent way, especially when dealing with computed properties and ensuring that the base object is only evaluated once.

What are @babel/helper-member-expression-to-functions's main functionalities?

Transforming member expressions into function calls

This feature allows Babel plugins to transform member expressions like `object.property` or `object['property']` into function calls that can handle the logic for computed properties and ensure the base object is evaluated once. This is particularly useful when compiling ES6 code to ES5.

memberExpressionToFunctions(path, visitor, state)

Other packages similar to @babel/helper-member-expression-to-functions

@babel/helper-function-name

This package is similar in that it is also a Babel helper used to transform functions. It helps with the naming of anonymous function expressions. While it does not directly transform member expressions, it is used in the process of transforming and naming functions within Babel plugins.

@babel/helper-replace-supers

This Babel helper is used to transform super calls in methods. It is similar to @babel/helper-member-expression-to-functions in that it deals with transforming parts of the language that involve property access, but it specifically targets super property calls.

@babel/helper-optimise-call-expression

This helper is used to optimize call expressions within Babel plugins. It is similar in the sense that it transforms call expressions, which can sometimes be the result of transforming member expressions with @babel/helper-member-expression-to-functions.

README

@babel/helper-member-expression-to-functions

Helper function to replace certain member expressions with function calls

See our website @babel/helper-member-expression-to-functions for more information.

Install

Using npm:

npm install --save @babel/helper-member-expression-to-functions

or using yarn:

yarn add @babel/helper-member-expression-to-functions

Changelog

v7.25.9 (2024-10-22)

:bug: Bug Fix

• babel-parser, babel-template, babel-types
  • #16905 fix: Keep type annotations in syntacticPlaceholders mode (@liuxingbaoyu)
• babel-helper-compilation-targets, babel-preset-env
  • #16907 fix: support BROWSERSLIST{,_CONFIG} env (@JLHwung)
• Other
  • #16884 Analyze ClassAccessorProperty to prevent the no-undef rule (@victorenator)

:house: Internal

• babel-helper-transform-fixture-test-runner
  • #16914 remove test options flaky (@JLHwung)

:running_woman: Performance

• babel-parser, babel-types
  • #16918 perf: Make VISITOR_KEYS etc. faster to access (@liuxingbaoyu)