every
Determines whether all the members of an array satisfy the specified test.
Parameters
predicate
A function that accepts up to three arguments. The every method calls the predicate function for each element in the array until the predicate returns a value which is coercible to the Boolean value false, or until the end of the array.
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.