provice-city_chen/babel.config.json

省市二级联动

{
    "presets": [
      [
        "@babel/env",
        {
          "targets": {
            "edge": "17",
            "firefox": "60",
            "chrome": "67",
            "safari": "11.1"
          },
          "useBuiltIns": "usage"
        }
      ]
    ]
  }