if condition inside forEach's anonymous function does not work

Consider the code snippet below:

function isUniform(myArray) {
    myArray.forEach(function(element) {
        if (element !== myArray[0]) {
            return false;
        }
    });

    return true;
}

The intention is that the function should take an array as input and return true if all the elements in the array are the same and false otherwise.

eg:

isUniform([1,2,1,1]); // should return false isUniform([1,1,1,1]); // should return true

However, the if condition:

if (element !== myArray[0])

never seem to be true in the case of isUniform([1,2,1,1]).

What is it that I am missing ?