Set type for function parameters?

Question

Is there a way to let a javascript function know that a certain parameter is of a certain type?

Being able to do something like this would be perfect:

Answer 1

Use typeof or instanceof:

const assert = require('assert');

function myFunction(Date myDate, String myString)
{
    assert( typeof(myString) === 'string',  'Error message about incorrect arg type');
    assert( myDate instanceof Date,         'Error message about incorrect arg type');
}