Confusing use of "function declaration" in describing default parameters

[senocular]

Alternative default parameters
Sometimes it makes sense to assign default values for parameters at a later stage after the function declaration.
...

function showMessage(text) {
  // ...

  if (text === undefined) { // if the parameter is missing
    text = 'empty message';
  }

  alert(text);
}

showMessage(); // empty message

The declaration includes the function definition. Saying "after the function declaration" suggests something happening after the entirety of the function when the description refers to something happening later in the body.