I need this in javascript! Thanks in advance!

Create a Gerbil class that inherits from the Animal class. The constructor should take two arguments and initialize the properties type from Animal and weight from Gerbil. Create a toString 0 method that overrides Animal's toString 0 method and returns the animal's type and weight properties, separated by a comma. Testing for existence of the Gerbil class Yours Testing super() with "type" in constructor Yours and expected differ. See highlights below. Further testing is suppressed until the above passes