Exclusive CSS selector

Question

I am working on a page where the selected item among a list is characterized by NOT having a given class. Something like the following:

Answer 1

In such case you may consider attribute selector like this:

console.log(document.querySelectorAll('li[class="a"]').length)

li[class="a"] {
  color:red;
}

  
Select me
  
Don't select me
  
Don't select me
  
Select me

Simply pay attention to extra spaces:

console.log(document.querySelectorAll('li[class="a"]').length)

li[class="a"] {
  color:red;
}

  
Pay attention to this one !!
  
Don't select me
  
Select me

But since you are using JS you can use trim() to get rid of the extra spaces:

var elem=document.querySelectorAll('li');
for(var i=0;i

li[class="a"] {
  color:red;
}

  
Pay attention to this one !!
  
Don't select me
  
Select me