我如何将类添加到div？

Question

Here's my on click function.

function toggleActiveClass(e){

    console.log(e);
}

here's where i call the function

<a href="#" onclick="toggleActiveClass(this)" class="link--no-decor link--dark">

here's the output it returns in the console

<a href="#" onclick="toggleActiveClass(this)" class="link--no-decor link--dark">
   <li>
      <div class="menu-item menu-item--google menu-item--radio">
         <span>...</span>
         <span class="va-middle">
         Personal info
         </span>
      </div>
   </li>
</a>

i want to add class "active" in the div tag inside that anchor tag like this.

<a href="#" onclick="toggleActiveClass(this)" class="link--no-decor link--dark">
   <li>
      <div class="menu-item menu-item--google menu-item--radio active">
         <span>...</span>
         <span class="va-middle">
         Personal info
         </span>
      </div>
   </li>
</a>

tried using this

function toggleActiveClass(e){

    e.target.childNodes[1].addClass("active");
}

but it didn't work. how do i add the class active to div? using javascript.

Answer 1

It does not work because addClass is not a method of DOM nodes .

You need to change the class list:

 function toggleActiveClass(link) { let div = link.querySelector('.menu-item'); div.classList.toggle('active'); } 

 .active { color:red; } 

 <a href="#" onclick="toggleActiveClass(this)" class="link--no-decor link--dark"> <li> <div class="menu-item menu-item--google menu-item--radio"> <span>...</span> <span class="va-middle"> Personal info </span> </div> </li> </a> 

I have other div with active class i want to remove the active class from that div?

I'd have to know the rest of your document's structure, but at a guess:

function toggleActiveClass(link)
{
  let currentActive = document.querySelector('.menu-item .active');
  currentActive.classList.remove('active');
  let newActive = link.querySelector('.menu-item');
  newActive.classList.add('active');
}

Answer 2

First of all, you are passing this to the function which does not have target . To get the target property you have to pass event . Then addClass() is a jQuery method, to add class in vanilla JS, you should use classList.add() . Though you should use toggle() like the following way:

 function toggleActiveClass(el){ //el.querySelector('div').classList.add("active"); el.querySelector('div').classList.toggle("active"); } 

 .active{ color:red; } 

 <a href="#" onclick="toggleActiveClass(this)" class="link--no-decor link--dark"> <li> <div class="menu-item menu-item--google menu-item--radio"> <span>...</span> <span class="va-middle"> Personal info </span> </div> </li> </a> 

Answer 3

Instead of this pass event

<a href="#" onclick="toggleActiveClass(event)" class="link--no-decor link--dark">

this will solve the issue