@babel/helper-builder-binary-assignment-operator-visitor

What is @babel/helper-builder-binary-assignment-operator-visitor?

@babel/helper-builder-binary-assignment-operator-visitor is a Babel helper module that assists in transforming binary assignment operators (like +=, -=, etc.) in JavaScript code. It provides utilities to create visitors for these operators, making it easier to handle and transform them during the Babel plugin development process.

What are @babel/helper-builder-binary-assignment-operator-visitor's main functionalities?

Transforming Binary Assignment Operators

This feature allows you to transform binary assignment operators like += into their expanded form. The code sample demonstrates how to create a visitor that transforms the += operator into a binary expression using the @babel/helper-builder-binary-assignment-operator-visitor package.

const { types: t } = require('@babel/core');
const build = require('@babel/helper-builder-binary-assignment-operator-visitor');

const visitor = build({
  operator: "+=",
  build: (left, right) => t.binaryExpression(
    "+",
    left,
    right
  )
});

const plugin = {
  visitor: {
    AssignmentExpression(path) {
      if (path.node.operator === "+=") {
        visitor(path);
      }
    }
  }
};

0

README

@babel/helper-builder-binary-assignment-operator-visitor

Helper function to build binary assignment operator visitors

See our website @babel/helper-builder-binary-assignment-operator-visitor for more information.

Install

Using npm:

npm install --save-dev @babel/helper-builder-binary-assignment-operator-visitor

or using yarn:

yarn add @babel/helper-builder-binary-assignment-operator-visitor --dev

Changelog

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)