JavaScript: Returns true if the provided predicate function returns true for all elements in a collection, false otherwise

//#Source https://bit.ly/2neWfJ2 
const all = (arr, fn = Boolean) => arr.every(fn);
console.log(all([4, 2, 3], x => x > 1)); 
console.log(all([4, 2, 3], x => x < 1));
console.log(all([1, 2, 3])); 

 Output:

true
false
true