lib.dom.d.ts(--,--): error TS2430: Interface 'Window' incorrectly extends interface 'WindowOrWorkerGlobalScope'.
  Types of property 'scheduler' are incompatible.
    Type 'Scheduler | undefined' is not assignable to type 'Scheduler'.
      Type 'undefined' is not assignable to type 'Scheduler'.


==== index.d.ts (0 errors) ====
    interface Window {
        readonly scheduler?: Scheduler;
    }
    