{ "plugins": [ "@babel/plugin-proposal-optional-chaining" ], "presets": [ ["@babel/preset-env", { "useBuiltIns": false, "targets": { "esmodules": true, }, }] ] } // { // "plugins": [ // "@babel/plugin-proposal-optional-chaining" // ], // "presets": [ // ["@babel/preset-env", { // "useBuiltIns": "usage", // "targets": { // // https://jamie.build/last-2-versions // "browsers": ["> 0.25%", "not ie 11", "not op_mini all"] // } // }] // ] // }