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              <div class="tabs">
  <div class="links">
    <a href="" data-tab="1">Tab 1</a>
    <a href="" data-tab="2">Tab 2</a>
    <a href="" data-tab="3">Tab 3</a>
    <a href="" data-tab="4">Tab 4</a>
    <div data-content="1" data-tab-active>Lorem ipsum dolor sit amet, consectetur adipisicing elit. Quam porro ipsum dolores, soluta repudiandae vel, fugiat commodi architecto magni nesciunt neque eum eius aliquid maiores officiis beatae nisi quia itaque.</div>
    <div data-content="2">Content 2</div>
    <div data-content="3">Content 3</div>
    <div data-content="4">Content 4</div>
              body {
  margin: 10px;

.links {
    margin-bottom: 10px;
.tabs div[data-content] {
    display: none;
.tabs div[data-tab-active] {
    display: inherit;
              var Module = (function () {
    var scope, slice = Array.prototype.slice;
    function showTab (event) {
        var attr = this.getAttribute('data-tab');
        var items = slice.call(scope.querySelectorAll('[data-content]'));
        items.forEach(function (item) {
            item[(item.getAttribute('data-content') === attr ? 'set' : 'remove') + 'Attribute']('data-tab-active', true);

    return function (elems) {
        scope = document.querySelector(elems);
        var tabs = slice.call(document.querySelectorAll(elems + ' [data-tab]'));
        tabs.forEach(function (tab) {
            tab.addEventListener('click', showTab);

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