setTimeout callback argument

Question

Let\'s consider this piece of JavaScript:

function Person(name) {
    this.name = name;
}

Person.prototype.showName = function() {
    alert(this.name);
}

         


        

Answer 1

setTimeout(mike.showName(), 5000); executes mike.showName() immediately and passes the return value to setTimeout()

setTimeout(function(){ mike.showName(); }, 5000); passes a pointer to the function instead. That way setTimeout can execute the function, rather than it's return value.