mkdocs-material/.babelrc

{
  "presets": [
    ["@babel/preset-env", {
      "loose": true,
      "targets": " > 1%, last 2 versions"
    }]
  ],
  "plugins": [
    ["@babel/plugin-transform-react-jsx", {
      "pragma": "JSX.createElement"
    }]
  ]
}