declare module 'sane-domparser-error'

/**
 * See https://stackoverflow.com/a/51390763/1470607
 */
type Falsy = false | 0 | '' | null | undefined

interface Array<T> {
  /**
   * Returns the elements of an array that meet the condition specified in a callback function.
   * @param predicate A function that accepts up to three arguments. The filter method calls the predicate function one time for each element in the array.
   * @param thisArg An object to which the this keyword can refer in the predicate function. If thisArg is omitted, undefined is used as the this value.
   */
  filter<S extends T>(
    predicate: BooleanConstructor,
    thisArg?: any
  ): Exclude<S, Falsy>[]
}

interface Window {
  MozMutationObserver?: MutationObserver
  WebKitMutationObserver?: MutationObserver
  MSStream?: ReadableStream
}

interface Document {
  mozFullScreenElement?: Element
  msFullscreenElement?: Element
  webkitFullscreenElement?: Element
}