# babel-plugin-syntax-optional-chaining Allow parsing of optional properties. ## Installation ```sh npm install --save-dev babel-plugin-syntax-optional-chaining ``` ## Usage ### Via `.babelrc` (Recommended) **.babelrc** ```json { "plugins": ["syntax-optional-chaining"] } ``` ### Via CLI ```sh babel --plugins syntax-optional-chaining script.js ``` ### Via Node API ```javascript require("babel-core").transform("code", { plugins: ["syntax-optional-chaining"] }); ```