spritejs/spritejs

{
  "presets": [
    [
      "@babel/preset-env",
      {
        "modules": false,
        "targets": {
          "chrome": "59"
        }
      }
    ]
  ],
  "plugins": [
    "@babel/plugin-proposal-class-properties",
    ["transform-gl-matrix", {
      "glMatrixArray": false
    }]
  ]
}