Array.prototype.filter()

The filter() method of Array instances creates a shallow copy of a portion of a given array, filtered down to just the elements from the given array that pass the test implemented by the provided function.

The filter() method is an iterative method. It calls a provided callbackFn function once for each element in an array, and constructs a new array of all the values for which callbackFn returns a truthy value. Array elements which do not pass the callbackFn test are not included in the new array.

callbackFn is invoked only for array indexes which have assigned values. It is not invoked for empty slots in sparse arrays.

Syntax example: filter(callbackFn)