I have some plain JavaScript that listens for clicks, and when clicked, four things happen:

1. The "Form Open" class has been added to the button
2. The "aria-expanded" attribute is set to "true"
3. Show the previously hidden div.
4. The "after" text of the button changes to "Close info" (This is controlled via CSS based on whether the button contains the new class "form-opened".)

When another button is clicked, the opposite happens to the first clicked button, the added class is removed, the "aria-expanded" attribute is reset to "false" and the div is hidden again (set again for CSS) and the "After" text reverts to "Read More".

However, if the same button is clicked a second time, the added class is removed as expected, and the div is hidden again, the "aria-expanded" attribute is not reset to "false". Can anyone explain why and tell me what I should do? (No jQuery, thanks).

const tips = Array.from(document.querySelectorAll('.toggle-button'));
tips.forEach((tip) => {
    tip.addEventListener('click', () => {
        tips
        .filter((f) => f !== tip)
        .forEach((f) => {
        f.setAttribute('aria-expanded', false);
        f.classList.remove('form-opened');
        });
        tip.setAttribute('aria-expanded', true);
        tip.classList.contains('form-opened');
        tip.classList.toggle('form-opened');
    });
});

.toggle-button ~ .tips {
  display: none;
}
button.toggle-button[aria-expanded="false"]:after {
  content: "Read more";
}
.toggle-button.form-opened ~ .tips {
  display: block;
  margin-bottom: 16px;
}
button.toggle-button[aria-expanded="true"]:after {
  content: "Close info";
  cursor: pointer;
}
.visually-hidden {
  border: 0;
  padding: 0;
  margin: 0;
  position: absolute;
  height: 1px;
  width: 1px;
  overflow: hidden;
  white-space: nowrap;
  display: inline-block;
}

<div class="toggle-box">
<label for="button-1" class="visually-hidden toggle-list">Open or Close info</label><button id="button-1" class="toggle-button" aria-expanded="false"></button>
<div class="tips">
  Here is some text that is to be revealed </div>
</div>
<div class="toggle-box">
<label for="button-2" class="visually-hidden toggle-list">Open or Close info</label><button id="button-2" class="toggle-button" aria-expanded="false"></button>
<div class="tips">
  Here is some text that is to be revealed </div>
</div>
<div class="toggle-box">
<label for="button-3" class="visually-hidden toggle-list">Open or Close info</label><button id="button-3" class="toggle-button" aria-expanded="false"></button>
<div class="tips">
  Here is some text that is to be revealed </div>
</div>

I've seen some similar queries, but not exactly the same or very old, or they use jQuery.