Posted By: user1280616
Just reference the variable inside the function; no magic, just use it’s name. If it’s been created globally, then you’ll be updating the global variable.
You can override this behaviour by declaring it locally using
var, but if you don’t use
var, then a variable name used in a function will be global if that variable has been declared globally.
That’s why it’s considered best practice to always declare your variables explicitly with
var. Because if you forget it, you can start messing with globals by accident. It’s an easy mistake to make. But in your case, this turn around and becomes an easy answer to your question.