babel/packages/babel-plugin-syntax-optional-chaining/README.md

@babel/plugin-syntax-optional-chaining

Allow parsing of optional properties.

Installation

npm install --save-dev @babel/plugin-syntax-optional-chaining

Usage

Via .babelrc (Recommended)

.babelrc

{
  "plugins": ["@babel/syntax-optional-chaining"]
}

Via CLI

babel --plugins @babel/syntax-optional-chaining script.js

Via Node API

require("@babel/core").transform("code", {
  plugins: ["@babel/syntax-optional-chaining"]
});