# babel-plugin-transform-object-assign > Replace `Object.assign` with an inline helper. If you are authoring an application, rather than a library, it is recommended that you use the `Object.assign` polyfill instead. ## Example **In** ```javascript Object.assign(a, b); ``` **Out** ```javascript var _extends = ...; _extends(a, b); ``` ## Caveats - Will only work with code of the form `Object.assign` or `Object['assign']`. The following patterns are not supported: ```javascript var { assign } = Object; var assign = Object.assign; ``` ## Installation ```sh npm install --save-dev babel-plugin-transform-object-assign ``` ## Usage ### Via `.babelrc` (Recommended) **.babelrc** ```json { "plugins": ["transform-object-assign"] } ``` ### Via CLI ```sh babel --plugins transform-object-assign script.js ``` ### Via Node API ```javascript require("babel-core").transform("code", { plugins: ["transform-object-assign"] }); ```