你会如何将这个 jQuery 代码重写到 ES6 中？

Question

这个想法是获取所有链接和响应 ID，隐藏非“活动”的内容。单击时，锚链接应该打开是相应的内容。

标记

<div class="navbar">
  <nav>
    <ul class="navTabs">
      <li class="active">
        <a href="#tab1">
          Tab 1
        </a>
      </li>
      <li>
        <a href="#tab2">
          Tab 2
        </a>
      </li>
      <li>
        <a href="#tab3">
          Tab 3
        </a>
      </li>
    </ul>
  </nav>
</div>
<div class="navcontent">
  <div class="content" id="tab1">
    <h4>
      Tab 1
    </h4>
    <p>Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod
      tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam,
      quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo
      consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse
      cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non
      proident, sunt in culpa qui officia deserunt mollit anim id est laborum.</p>
  </div>
  <div class="content" id="tab2">
    <h4>
      Tab 2
    </h4>
    <p>
      Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod
      tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam,
      quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo
      consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse
      cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non
      proident, sunt in culpa qui officia deserunt mollit anim id est laborum.
    </p>
  </div>
  <div class="content" id="tab3">
    <h4>
      Tab 3
    </h4>
    <p>
      Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod
      tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam,
      quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo
      consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse
      cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non
      proident, sunt in culpa qui officia deserunt mollit anim id est laborum.
    </p>
  </div>
</div>

脚本

$('ul.navTabs').each(function() {
  var $active, $content, $links = $(this).find('a');

  $active = $($links.filter('[href="' + location.hash + '"]')[0] || $links[0]);
  $active.addClass('active');

  $content = $($active[0].hash);

  $links.not($active).each(function() {
    $(this.hash).hide();
  });

  $(this).on('click', 'a', function(e) {
    e.preventDefault();

    $active.removeClass('active');
    $content.hide();

    $active = $(this);
    $content = $(this.hash);

    $active.addClass('active');
    $content.show();
  });

});

上面的脚本代码有效，挑战是将其重写到 ES6 中（我在下面做了，但没有按预期工作）。 Here 是一个 jsFiddle 代码来说明我面临的问题。

$("ul.navTabs > li").each((index, element) => {
  // keep track of tabs and associated content
  const anchorTag = $(element).find("a");
  let active = anchorTag;
  let content = anchorTag;
  const links = anchorTag;

  // if identifyUrlHash matches one of the links, use that as active tab
  // if no match found, use first link as initial active tab
  const identifyUrlHash = window.location.hash;
  active = $(links.filter(`[href="${identifyUrlHash}"]`)[0] || links[0]);
  active.addClass("active");

  content = $(active[0].hash);

  // hide the remaining content
  links.not(active).each(element, (subindex, subelement) => {
    $(subelement.hash).hide();
  });

  $(element).on("click", "a", (event) => {
    event.preventDefault();

    // old tab inactive
    active.removeClass("active");
    content.hide();

    // update variables with new link and content
    active = $(element);
    content = $(element.hash);

    // make tab active
    element.addClass("active");
    content.show();
  });
});

Answer 1

• 在链接和窗格上都使用.active 类。
• 不要设置 LI 元素的样式。在 A 元素中使用 active
• 使用 JS 的 classList.toggle() 方法（或 jQuery 中的 .toggleClass()）

jQuery

const $tabs = $(".navbar a");
const $panes = $(".navcontent .content");

const handlePanes = (ev) => {
  const hash = ev ? ev.currentTarget.hash : window.location.hash;
  if (!hash) return; // No hash, use inline "active" classes
  $tabs.each((i, el) => $(el).toggleClass("active", el.hash === hash));
  $panes.each((i, el) => $(el).toggleClass("active", el.id === hash.replace("#", "")));
}

$tabs.on("click", handlePanes);
handlePanes(); // On init, page load, read hash (if any) and make active

.navbar nav ul {
  margin: 0;
  padding: 0;
  display: flex;
  flex-flow: row nowrap;
  list-style-type: none;
}

/* PS don't overstyle LI elements treat them like you would TD elements */

.navbar nav a {
  text-decoration: none;
  display: block;
  padding: 5px 10px;
}

.navbar nav a.active { /* style inner elements instead */
  border-bottom: 2px solid black;
}

/* PANES STYLES */
.navcontent .content {
  display: none;
}
.navcontent .content.active {
  display: block;
}

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<div class="navbar">
  <nav>
    <ul class="navTabs">
      <li>
        <a href="#tab1" class="active">
          Tab 1
        </a>
      </li>
      <li>
        <a href="#tab2">
          Tab 2
        </a>
      </li>
      <li>
        <a href="#tab3">
          Tab 3
        </a>
      </li>
    </ul>
  </nav>
</div>
<div class="navcontent">
  <div class="content active" id="tab1">
    <h4>
      Tab 1
    </h4>
    <p>11111 Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure
      dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.</p>
  </div>
  <div class="content" id="tab2">
    <h4>
      Tab 2
    </h4>
    <p>
      22222 Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor
      in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.
    </p>
  </div>
  <div class="content" id="tab3">
    <h4>
      Tab 3
    </h4>
    <p>
      33333 Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor
      in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.
    </p>
  </div>
</div>

JavaScript（无 jQuery）

const ELS_tabs = document.querySelectorAll(".navbar a");
const ELS_panes = document.querySelectorAll(".navcontent .content");

const handlePanes = (ev) => {
  const hash = ev ? ev.currentTarget.hash : window.location.hash;
  if (!hash) return; // No hash, use inline "active" classes
  ELS_tabs.forEach(el => el.classList.toggle("active", el.hash === hash));
  ELS_panes.forEach(el => el.classList.toggle("active", el.id === hash.replace("#", "")));
}

ELS_tabs.forEach(el => el.addEventListener("click", handlePanes));
handlePanes(); // On init, page load, read hash (if any) and make active 

.navbar nav ul {
  margin: 0;
  padding: 0;
  display: flex;
  flex-flow: row nowrap;
  list-style-type: none;
}

/* PS don't overstyle LI elements treat them like you would TD elements */

.navbar nav a {
  text-decoration: none;
  display: block;
  padding: 5px 10px;
}

.navbar nav a.active { /* style inner elements instead */
  border-bottom: 2px solid black;
}

/* PANES STYLES */
.navcontent .content {
  display: none;
}
.navcontent .content.active {
  display: block;
}

<div class="navbar">
  <nav>
    <ul class="navTabs">
      <li>
        <a href="#tab1" class="active">
          Tab 1
        </a>
      </li>
      <li>
        <a href="#tab2">
          Tab 2
        </a>
      </li>
      <li>
        <a href="#tab3">
          Tab 3
        </a>
      </li>
    </ul>
  </nav>
</div>
<div class="navcontent">
  <div class="content active" id="tab1">
    <h4>
      Tab 1
    </h4>
    <p>11111 Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure
      dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.</p>
  </div>
  <div class="content" id="tab2">
    <h4>
      Tab 2
    </h4>
    <p>
      22222 Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor
      in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.
    </p>
  </div>
  <div class="content" id="tab3">
    <h4>
      Tab 3
    </h4>
    <p>
      33333 Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor
      in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.
    </p>
  </div>
</div>