{ "presets": [ [ "@babel/preset-env", { "targets": { "node": "10" } } ] ], "plugins": [ "source-map-support", "@babel/plugin-transform-runtime", "@babel/plugin-syntax-bigint", "@babel/plugin-proposal-nullish-coalescing-operator", "@babel/plugin-proposal-numeric-separator", "@babel/plugin-proposal-optional-chaining", ["@babel/plugin-proposal-private-methods", {"loose": true}], ["@babel/plugin-proposal-class-properties", {"loose": true}], ["@babel/plugin-proposal-private-property-in-object", {"loose": true}] ], "comments": false, "sourceMaps": "both", "env": { "coverage": { "plugins": [ [ "istanbul", { "exclude": ["test", "build"] } ] ] } } }