gatsby-plugin-babel-optional-chaining v1.0.0

Gatsby plugin for babel optional chaining operator

Description

This plugin enables the optional chaining operator (a?.b) TC39 proposal for Gatsby.

How to install

Install the plugin and its dependencies:

npm i gatsby-plugin-babel-optional-chaining @babel/core @babel/plugin-proposal-optional-chaining

or

yarn add gatsby-plugin-babel-optional-chaining @babel/core @babel/plugin-proposal-optional-chaining

Add the plugin to gatsby-config.js:

module.exports = {
  plugins: [
    // other plugins
    'gatsby-plugin-babel-optional-chaining',
  ],
}

Examples of usage

const obj = {
  foo: {
    bar: {
      baz: 42,
    },
  },
};

const baz = obj?.foo?.bar?.baz; // 42

const safe = obj?.qux?.baz; // undefined

// Optional chaining and normal chaining can be intermixed
obj?.foo.bar?.baz; // Only access `foo` if `obj` exists, and `baz` if
                   // `bar` exists

// Example usage with bracket notation:
obj?.['foo']?.bar?.baz // 42