Is javascript window.location.hash defined?

Question

Is there any way to determine if it is defined window.location.hash?

If it is set, I get the value of the variable and use it to display additional content on the page.

Answer 1

if(window.location.hash) {
    // do stuff!
}

Answer 2

What about:

if(window.location.hash !== '')
{
}

or

if(typeof window.location.hash !== 'undefined')
{
    //your code
}