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JavaScript DOM Scripting By Example Adding and Removing Names RSVP Checkbox

Jeff T
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.a{fill-rule:evenodd;}techdegree
Jeff T
Full Stack JavaScript Techdegree Student 9,532 Points

What's the difference here?

// What's the difference between doing this(as in the video)

ul.addEventListener('change', (e) => {
const checkbox = event.target;
const checked = checkbox.checked;
const listItem = checkbox.parentNode.parentNode;

if(checked) {
  listItem.className = 'responded';
} else {
    listItem.className = '';
  }
});

//and this

ul.addEventListener('change', (e) => {
  const li = e.target.parentNode.parentNode;
  li.className = e.target.checked ? 'responded' : '';
});

Is my solution slower or harder to understand?

1 Answer

Steven Parker
Steven Parker
230,037 Points

Your solution looks fine. The video example probably avoids constructs like ternary expressions which are not introduced in the same course to focus specifically on the concepts being introduced in this lesson.

The more courses you take, the more often you'll notice ways to make examples more compact by combining things you've learned, since the instructor needs to show each concept without knowing which other courses have already been taken.