FAQの開閉

HTML

<ul class="faq__list">

<?php if (have_rows('faq_list')) : ?>
<?php while (have_rows('faq_list')) : the_row(); ?>

    <li class="faq__item">
        <p class="_q"><?php the_sub_field('faq_q'); ?><span class="plus"></span></p>
        <p class="_a"><?php the_sub_field('faq_a'); ?></p>
    </li>

<?php endwhile; ?>
<?php endif; ?>
</ul>

JS

<script>
  (() => {
    const menu = document.querySelectorAll("._q");

    function toggle() {
      const content = this.nextElementSibling;
      const icon = this.firstElementChild;
      this.classList.toggle("active");
      icon.classList.toggle("active");
      content.classList.toggle("open");
      if (content.classList.contains("open")) {
        content.style.height = content.scrollHeight + 'px';
        content.style.marginBottom = '1em';
      } else {
        content.style.height = "0";
        content.style.marginBottom = '0';
      }
    }

    for (let i = 0; i < menu.length; i++) {
      menu[i].addEventListener("click", toggle);
    }

  })();
</script>

SCSS

.faq__item {
  position: relative;
  @include margin-bottom(10);

  ._q,
  ._a {
    @include padding-left(35);
    font-size: 1.6rem;
    position: relative;

    &::before {
      @include font-size(18);
      font-weight: 700;
      color: var(--yellow);
      position: absolute;
      @include top_px(-4);
      @include left_px(6);
    }
    .txt {
      margin-bottom: 0;
    }
  }
  ._q {
    font-weight: 500;
    padding-bottom: 10px;

    &::before {
      content: "Q";
    }

    &::after {
      content: "";
      width: 100%;
      height: 5px;
      position: absolute;
      bottom: 0;
      left: 0;
      @include bg-img("border-yellow", repeat-x, 80px);
    }

    &:hover {
      opacity: 0.7;
      cursor: pointer;
    }

    .plus {
      display: block;
      vertical-align: 0.3em;
      color: var(--yellow);
      line-height: 1;
      width: 1em;
      height: 3px;
      background: currentColor;
      border-radius: 0.1em;
      position: absolute;
      @include top_px(15);
      @include right_px(15);

      &::before {
        content: "";
        position: absolute;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        background: inherit;
        border-radius: inherit;
        transform: rotate(90deg);
        transition-duration: 0.3s;
      }

      &.active:before {
        transform: rotate(0deg);
      }
    }
  }
  ._a {
    height: 0;
    overflow: hidden;
    transition: all 0.5s;
    margin-bottom: 0;

    &::before {
      content: "A";
      color: var(--main);
    }
  }
}