Event Handler access context JavaScript

I have a question in JavaScript context. I'm a little confused by this issue. The code below describes my question:

$(..).someFunction{
  var outOfScope = "OUT OF SCOPE!";

  $('somelink').click(handler);

  function handler() {
    alert(outOfScop开发者_如何学JAVAe);
  }
}

My question is: how outOfScope variable (which was defined outside the handler) is seen inside the handler?

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The variable outOfScope is scoped to someFunction, so it is available inside someFunction.

The function handler is inside someFunction, so the variable outOfScope is still available.

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That´s how JavaScript works.

All variables that are defined directly inside a scope will also be available in all the scopes that are defined inside the scope.