JSFiddle - React, Tailwind, and code Playground

by tmtron

HTML

<nav class="link-bar">
  <div class="context-bar">
    <a href="#" class="context-bar-link">Item 1</a>
    <a href="#" class="context-bar-link">Item 22</a>
    <a href="#" class="context-bar-link">Item 333</a>
    <a href="#" class="context-bar-link">Item 4444</a>
    <a href="#" class="context-bar-link">Item 5555555</a>
    <a href="#" class="context-bar-link">Item 66</a>
    <a href="#" class="context-bar-link">Item 7777777777777</a>
    <a href="#" class="context-bar-link">Item 8</a>
    <a href="#" class="context-bar-link">Item 999999</a>
    <a href="#" class="context-bar-link">Item 10101010</a>
    <a href="#" class="context-bar-link">Item 1111</a>
    <a href="#" class="context-bar-link">Item 12121212</a>
    <a href="#" class="context-bar-link">Item 1313131313131</a>
    <a href="#" class="context-bar-link">Item 1414</a>
    <a href="#" class="context-bar-link">Item 15</a>
    <a href="#" class="context-bar-link">Item 16161616</a>
    <a href="#" class="context-bar-link">Item 1717</a>
    <a href="#" class="context-bar-link">Item 18181818181818</a>
    <a href="#" class="context-bar-link">Item 191919</a>
    <a href="#" class="context-bar-link">Item 20</a>
    <a href="#" class="context-bar-link">Item 212121</a>
    <a href="#" class="context-bar-link">Item 2222</a>
  </div>
  <div class="grouped dropdown">
    <a href="#" class="grouped-link">More</a>
    <div class="dropdown-content">
    </div>
  </div>
</nav>

SCSS

body {
  background-color: white;
  width: 100%;
  overflow-x: hidden;
  font-size: 14px;
  margin: 0;
  padding: 0;
}

a {
  color: #fff;
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

.link-bar {
  display: flex;
  position: relative;
  background: grey;
  padding: 0 10px;
  color: #000;
  width: 100%;
  box-sizing: border-box;
  a {
    color: #FFF;
  }
}

.context-bar {
  flex: 1;
  height: 60px;
  overflow: hidden;
}

.context-bar-link, .grouped-link {
  display: inline-block;
  margin: 0;
  padding: 20px 10px;
  text-align: center;
}
.context-bar-link.active, .grouped-link.active {
  background-color: #666;
}

.dropdown:hover {
  background-color: red;
}

.dropdown-content {
    display: none;
    position: absolute;
    background-color: #f9f9f9;
    min-width: 160px;
    right: 10px;
    box-shadow: 0px 8px 16px 0px rgba(0,0,0,0.2);
    max-height: 200px;
    overflow-y: auto;
}

.dropdown-content a {
    color: black;
    padding: 12px 16px;
    text-decoration: none;
    display: block;
    text-align: left;
}

.dropdown-content a:hover {background-color: #f1f1f1}

JavaScript

var contentBar = $('.context-bar'),
  dropdown = $('.dropdown-content'),
  more = $('a.grouped-link'),
  selected = '';

$(window).resize(update);
more.click(function() {
  dropdown.slideToggle(200);
});
contentBar.on('click', 'a.context-bar-link', function() {
  linkClick.call(this, 'More')
});
dropdown.on('click', 'a.context-bar-link', function() {
  linkClick.call(this)
});
update();

function linkClick(val) {
  contentBar.children().removeClass('active');
  this.classList.add("active");
  selected = this.innerHTML;
  more.html(val || selected)[val ? 'removeClass' : 'addClass']('active');
  dropdown.slideUp(200);
  update()
}

function update() {
  var offsetTop = contentBar.offset().top;
  dropdown.empty();
  contentBar.children().each(function(i, a) {
    if ($(a).offset().top > offsetTop) {
      console.log('yy');
      if (a.innerHTML == selected) {
        a.classList.add("active");
        more.html(a.innerHTML).addClass('active');
      }
      dropdown.append($(a).clone());
    } else if (a.innerHTML == more.html()) {
      more.html('More').removeClass('active');
      return false;
    }
  });
}