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HTML Settings

Here you can Sed posuere consectetur est at lobortis. Donec ullamcorper nulla non metus auctor fringilla. Maecenas sed diam eget risus varius blandit sit amet non magna. Donec id elit non mi porta gravida at eget metus. Praesent commodo cursus magna, vel scelerisque nisl consectetur et.

  <ul id="parent-ul-1">
    <li id="li-1" class="my-class">Item 1</li>
    <li id="li-2" class="my-class">Item 2</li>
    <li id="li-3" class="my-class">Item 3</li>
  <p id="display-msg-1"><p>

  <ul id="parent-ul-2">
    <li id="li-4" class="my-class">Item 4</li>
    <li id="li-5" class="my-class">Item 5</li>
    <li id="li-6" class="my-class">Item 6</li>
  <p id="display-msg-2"><p>

  <ul id="parent-ul-3">
    <li id="li-7" class="my-class">Item 7</li>
    <li id="li-8" class="my-class">Item 8</li>
    <li id="li-9" class="my-class">Item 9</li>
  <p id="display-msg-3"><p>

  <button id="unbind" type="button">Unbind Column 3</button>
  <button id="bind" type="button">Bind Column 3</button>
  <p id="display-msg-4"><p>
              $pri: #888;
$pri-light: lighten($pri, 20%);
$pri-dark: darken($pri, 20%);
$pri-dark-x: darken($pri, 30%);
* { box-sizing: border-box; }
body {
  font-family: arial;
  margin: 2em;
  background: #222;
@keyframes play {
   0% { left: 0; }
   50% { left: 20px; }
   100% { left: 0;}
.moveMe {
  animation: play .8s;
  position: relative;
  margin: 0;
section {
  width: 25%;
  float: left;
  padding-right: 1%;
ul {
  width: 100%;
  color: $pri-light;
  li {
    background-color: $pri-dark-x;
    border-bottom: 2px solid $pri-light;
    padding: 1em;
    list-style-type: none;
    cursor: pointer;
p {
  padding: 1em 0 0 0;
  color: #fff;
  font-size: 1em;
button {
  width: 100%;
  display: block;
  border: 0;
  background-color: $pri-dark;
  padding: 1em;
  margin-bottom: 1em;
  font-size: 1em;
  color: $pri-light;
  border: 5px solid  $pri-light;
  &:hover { background-color: $pri-dark-x; }
  &:active { 
    box-shadow: inset 0 0 5px $pri-dark-x;
    background-color: $pri-dark-x; }
  &:focus { outline: 0; }
// Event delegation is useful in that you only place the event listener on the parent to capture the bubbled event - imagine a table of 1000 rows. The callback function lets you handle it in any way.

var dm1 = document.getElementById("display-msg-1");
document.getElementById("parent-ul-1").addEventListener("click", function(e) {
  if(e.target) {
    var msg = "Clicked on: " + e.target.firstChild.nodeValue;
    // You could capture any attribute of this clicked element
    // "ID:" + e.target.id or "Class:" + e.target.className
    addRemoveClass(dm1, msg);
function addRemoveClass(c, msg) {
  c.innerHTML = msg;
  c.offsetWidth = c.offsetWidth;
// And with jQuery .delegate
$("#parent-ul-2").delegate( "li", "click", function() {
  var dm2 = $("#display-msg-2");
  var msg = dm2.text( "Clicked on: " + $(this).text());
  jq_addRemoveClass(dm2, msg);
// For.on just reverse the event and target
$("#parent-ul-3").on("click", "li", function() {
  var dm3 = $("#display-msg-3");
  var msg = dm3.text( "Clicked on: " + $(this).text());
  jq_addRemoveClass(dm3, msg);
function jq_addRemoveClass(c, msg) {
// .off - removes both .delegate and .on
$( "#unbind" ).click(function() {
  $( "#parent-ul-3" )
    .off( "click", "li")
    .find( "#display-msg-4" )
    $("#display-msg-4" ).text("Removed .on from C3");
$("#bind").click(function() {
  // Real world, I'd abstract the sect 3 declaration into it's own function
    $("#parent-ul-3").on("click", "li", function() {
      var dm3 = $("#display-msg-3");
      var msg = dm3.text( "Clicked on: " + $(this).text());
      jq_addRemoveClass(dm3, msg);
  $("#display-msg-4").text("Added .on to C3");
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