Function callback

test/test.js:7–13

(counter)

      areaContainer, area

  function callback (counter) {
    paragraphs.innerHTML = counter.paragraphs
    sentences.innerHTML = counter.sentences
    words.innerHTML = counter.words
    characters.innerHTML = counter.characters
    all.innerHTML = counter.all
  }

  function check (values) {
    expect(paragraphs.innerHTML).to.equal(values[0])