You’re in the global scope, and you want to create a new global var.
There are different options. What is the difference between them?
1) This will work because the current scope happens to be the global
scope:
var foo = 42;
Obviously, this would fail to create the var in the global scope when
called from inside another scope.
2) Another option is to use:
window.foo = 42;
This will work regardless of the scope it’s called from.
3) When called from the global scope, you can omit var and just go
like this:
foo = 42;
Let’s assume you’re working in the global scope already and you want
to create a new global variable. What do you guys recommend? Should
the `var` keyword be used (first example) even though it’s not
necessary in this case? Are there any other implications I should be
aware of? What is considered to be the best practice here?
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