# babel-plugin-transform-es3-member-expression-literals > Ensure that reserved words are quoted in property accesses ## Example **In** ```javascript foo.catch; ``` **Out** ```javascript foo["catch"]; ``` ## Installation ```sh npm install --save-dev babel-plugin-transform-es3-member-expression-literals ``` ## Usage ### Via `.babelrc` (Recommended) **.babelrc** ```json { "plugins": ["transform-es3-member-expression-literals"] } ``` ### Via CLI ```sh babel --plugins transform-es3-member-expression-literals script.js ``` ### Via Node API ```javascript require("babel-core").transform("code", { plugins: ["transform-es3-member-expression-literals"] }); ```