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

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

Remove nullish coalescing operator

7.18.6
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What is @babel/plugin-proposal-nullish-coalescing-operator?

The @babel/plugin-proposal-nullish-coalescing-operator package allows developers to use the nullish coalescing operator (??) in their JavaScript code. This operator is a logical operator that returns its right-hand side operand when its left-hand side operand is null or undefined, and otherwise returns its left-hand side operand. This plugin transforms nullish coalescing operator syntax into equivalent JavaScript code that can be understood by JavaScript engines that do not support this feature natively.

What are @babel/plugin-proposal-nullish-coalescing-operator's main functionalities?

Nullish Coalescing for Default Values

Use the nullish coalescing operator to provide a default value for a variable that might be null or undefined. This is useful for handling API responses that might not return data.

const response = apiResponse ?? 'default value';

Combining with Logical OR for Fallbacks

Combine the nullish coalescing operator with the logical OR operator to provide a default value that is an object if both user settings and default settings are null or undefined. This showcases how nullish coalescing can be used in conjunction with other logical operators for more complex fallback mechanisms.

const settings = userSettings ?? defaultSettings || {};

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babel-plugin

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Package last updated on 27 Jun 2022

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