What is the difference between these two object methods in Javascript?

Asked Sep 22 '14 at 18:05

Active Sep 22 '14 at 18:05

Viewed 44 times

Consider the following code:

function someObj() {
    this.someFunction = function() {
        console.log('someFunction');
    }
}

someObj.prototype.foo = function() {
    console.log('foo');
}

I can call both like so:

var test = new someObj();
test.someFunction();     // Logs 'someFunction'
test.foo();              // Logs 'foo'

How would variable scope be affected here? Is there an advantage / disadvantage to each approach?

asked Sep 22 '14 at 18:05

nhuff717

Thank you, this can be closed. – nhuff717 Sep 22 '14 at 18:11
http://stackoverflow.com/questions/572897/how-does-javascript-prototype-work?rq=1 – Muhammad Umer Sep 22 '14 at 18:18
*"How would variable scope be affected here?"* JavaScript has lexical scope. So the function stored in `this.someFunction` has access to all variables declared in `someObj`, while `someObj.prototype.foo` doesn't. – Felix Kling Sep 22 '14 at 18:21

What is the difference between these two object methods in Javascript?

0 Answers0