Javascript if variable is not null

Question

if (typeof (location.x != null) {

Using the above I run into the follow error: Uncaught TypeError: Cannot read property 'x' of null

I have tried console.log(location.x) which results in an example with null

Answer 1

if (location && location.x) {

}    

Answer 2

You can just do:

if (location && location.x) {

}