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{  "plugins": [    "@babel/plugin-proposal-optional-chaining",    "@babel/plugin-proposal-nullish-coalescing-operator",    ["@babel/plugin-proposal-class-properties", {"loose": true}]  ],  "presets": [    [      "@babel/preset-env",      {        "loose": true,        "useBuiltIns": false,        "modules": false,        "shippedProposals": true,        "targets": {          // node: '10',          "browsers": [            "last 2 Chrome versions",            "last 2 Firefox versions",            "last 2 Safari versions",            "last 2 Edge versions"          ]        }      }    ]  ]}