HTML
<section class="container">
<div class="list-item">
<div class="item-content">
<span class="order">1</span> Alpha
</div>
</div>
<div class="list-item">
<div class="item-content">
<span class="order">2</span> Bravo
</div>
</div>
<div class="list-item">
<div class="item-content">
<span class="order">3</span> Charlie
</div>
</div>
<div class="list-item">
<div class="item-content">
<span class="order">4</span> Delta
</div>
</div>
</section>
SCSS
html, body {
height: 100%;
}
body {
cursor: url("https://s3-us-west-2.amazonaws.com/s.cdpn.io/106114/cursor.png") 32 32, auto;
background: rgb(255,255,255);
overflow: hidden;
}
*, *:before, *:after {
box-sizing: border-box;
}
.container {
position: relative;
top: 50%;
left: 50%;
width: 320px;
height: 500px;
opacity: 0;
visibility: hidden;
transform: translate(-50%, -50%);
}
.list-item {
position: absolute;
top: 0;
left: 0;
height: 48px;
width: 100%;
}
.item-content {
height: 100%;
border-top: 1px solid rgba(0, 0, 0, 0.498039);
color: rgb(153, 153, 153);
line-height: 48px;
padding-left: 32px;
font-size: 16px;
font-weight: 400;
background-color: rgb(255, 255, 255);
}
ES6
var rowSize = 50; // => container height / number of items
var container = document.querySelector(".container");
var listItems = Array.from(document.querySelectorAll(".list-item")); // Array of elements
var sortables = listItems.map(Sortable); // Array of sortables
var total = sortables.length;
TweenLite.to(container, 0.5, { autoAlpha: 1 });
function changeIndex(item, to) {
// Change position in array
arrayMove(sortables, item.index, to);
// Change element's position in DOM. Not always necessary. Just showing how.
if (to === total - 1) {
container.appendChild(item.element);
} else {
var i = item.index > to ? to : to + 1;
container.insertBefore(item.element, container.children[i]);
}
// Set index for each sortable
sortables.forEach((sortable, index) => sortable.setIndex(index));
}
function Sortable(element, index) {
var content = element.querySelector(".item-content");
var order = element.querySelector(".order");
var animation = TweenLite.to(content, 0.3, {
boxShadow: "rgba(0,0,0,0.2) 0px 8px 16px 0px",
force3D: true,
scale: 1.01,
paused: true
});
var dragger = new Draggable(element, {
onDragStart: downAction,
onRelease: upAction,
onDrag: dragAction,
cursor: "inherit",
type: "y"
});
// Public properties and methods
var sortable = {
dragger: dragger,
element: element,
index: index,
setIndex: setIndex
};
TweenLite.set(element, { y: index * rowSize });
function setIndex(index) {
sortable.index = index;
order.textContent = index + 1;
// Don't layout if you're dragging
if (!dragger.isDragging) layout();
}
function downAction() {
animation.play();
this.update();
}
function dragAction() {
// Calculate the current index based on element's position
var index = clamp(Math.round(this.y / rowSize), 0, total - 1);
if (index !== sortable.index) {
changeIndex(sortable, index);
}
}
function upAction() {
animation.reverse();
layout();
}
function layout() {
TweenLite.to(element, 0.3, { y: sortable.index * rowSize });
}
return sortable;
}
// Changes an elements's position in array
function arrayMove(array, from, to) {
array.splice(to, 0, array.splice(from, 1)[0]);
}
// Clamps a value to a min/max
function clamp(value, a, b) {
return value < a ? a : (value > b ? b : value);
}
