global.d.ts

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>[]
}