{ "presets": [ [ "@babel/preset-react", { "pragma": "dom", // default pragma is React.createElement (only in classic runtime) "pragmaFrag": "DomFrag", // default is React.Fragment (only in classic runtime) "throwIfNamespace": false, // defaults to true "runtime": "classic" // defaults to classic // "importSource": "custom-jsx-library" // defaults to react (only in automatic runtime) } ] ] }