1  {
 2    "presets": [
 3      ["env", {
 4        "targets": {
 5          "node": "6"
 6        }
 7      }]
 8    ],
 9    "plugins": [
10      "transform-class-properties", ["transform-runtime", {
11        "polyfill": false
12      }]
13    ]
14  }