Does jQuery provide a way to to that test in a more concise way?

**Update**
I should have left jQuery out of this. It is just an issue of JavaScript. It's been so long for me! I am testing to see is something externally-defined module was loaded or not. It appears that I can just use this instead:

```
if (window.someVar)

```

Please correct me if this is a bad practice. In my case, if someVar is defined, it will be an object. It will not be defined to false.