static/tsconfig.json

{
  "compilerOptions": {
    /* Module options */
    "target": "es5",
    "rootDir": ".",
    /* Code emitting options */
    "sourceMap": true,
    "downlevelIteration": true,
    "importHelpers": true,
    /* Interoperability constraints */
    "esModuleInterop": true
  }
}