javascript - How to Select Element That Does Not have Specific Class

Question

I'm wondering how to select an element that does not have a specific class using JavaScript, not jQuery.

For example, I have this list:

<ul id="tasks">
  <li class="completed selected">One Task</li>
  <li>Two Task</li>
</ul>

and I select the completed task by:

var completeTask = document.querySelector("li.completed.selected");

But then I'm not sure how to select the list item that does not have those classes.

Answer 1

This selects the second LI element.

document.querySelector("li:not([class])")

or

document.querySelector("li:not(.completed):not(.selected)")

Example:

// select li which doesn't have a 'class' attribute...
console.log(document.querySelector("li:not([class])"))

// select li which doesn't have a '.completed' and a '.selected' class...
console.log(document.querySelector("li:not(.completed):not(.selected)"))

?<ul id="tasks">
    <li class="completed selected">One Task</li>
    <li>Two Task</li>
  </ul>