JS
challenger

Check if all array elements are equal

Write a function that takes an array as argument. It should return true if all elements in the array are equal. It should return false otherwise.
function
myFunction
(
arr
)
{

return
}
Test Cases:
myFunction([true, true, true, true])
Expected
true
myFunction(['test', 'test', 'test'])
Expected
true
myFunction([1,1,1,2])
Expected
false
myFunction(['10',10,10,10])
Expected
false