@babel/plugin-transform-logical-assignment-operators

What is @babel/plugin-transform-logical-assignment-operators?

The @babel/plugin-transform-logical-assignment-operators package is a Babel plugin that allows the transformation of logical assignment operators in JavaScript code. This plugin is particularly useful for ensuring compatibility with environments that do not support newer ECMAScript features, such as logical assignment operators. It transforms these operators into equivalent expressions that are compatible with older JavaScript engines.

What are @babel/plugin-transform-logical-assignment-operators's main functionalities?

Logical AND assignment (&&=)

This feature allows the use of the logical AND assignment operator, which assigns the value on the right to the variable on the left only if the left side is truthy.

a &&= b; // Transforms to: a = a && b;

Logical OR assignment (||=)

This feature enables the logical OR assignment operator, which assigns the value on the right to the variable on the left if the left side is falsy.

a ||= b; // Transforms to: a = a || b;

Logical nullish assignment (??=)

This feature supports the logical nullish assignment operator, which assigns the value on the right to the variable on the left only if the left side is null or undefined.

a ??= b; // Transforms to: a = a ?? b;

Other packages similar to @babel/plugin-transform-logical-assignment-operators

@babel/plugin-proposal-optional-chaining

This package transforms optional chaining operators (?.) into a series of checks that ensure each reference is valid before accessing deeper properties. It is similar in that it also deals with modern JavaScript features for compatibility but focuses on property access rather than assignment.

@babel/plugin-proposal-nullish-coalescing-operator

This package transforms nullish coalescing operators (??) into equivalent logical expressions. It is similar to @babel/plugin-transform-logical-assignment-operators in handling operations that involve null or undefined values but focuses on binary operations rather than assignments.

README

@babel/plugin-transform-logical-assignment-operators

Transforms logical assignment operators into short-circuited assignments

See our website @babel/plugin-transform-logical-assignment-operators for more information.

Install

Using npm:

npm install --save-dev @babel/plugin-transform-logical-assignment-operators

or using yarn:

yarn add @babel/plugin-transform-logical-assignment-operators --dev