Variable ProgressEvent

ProgressEvent: {
prototype: ProgressEvent<EventTarget>;
new (type: string, eventInitDict?: ProgressEventInit): ProgressEvent<EventTarget>;
}

- new (type: string, eventInitDict?: ProgressEventInit): ProgressEvent<EventTarget>
- Parameters
  - type: string
  - Optional eventInitDict: ProgressEventInit
  Returns ProgressEvent<EventTarget>
prototype: ProgressEvent<EventTarget>