基于jqueryui可自由拖拽的弹性圆形菜单效果

<link rel="stylesheet" href="css/style.css">
<script src="path/to/jquery.min.js"></script>
<script src="path/to/jquery-ui.min.js"></script>
<script src="path/to/anime.js"></script>

<div class="center menu">
 <div id="myMenu"></div>
</div>

var timeOut;
 
class Item {
 constructor(icon, backgroundColor) {
 this.$element = $(document.createElement("div"));
 this.icon = icon;
 this.$element.addClass("item");
 this.$element.css("background-color", backgroundColor);
 var i = document.createElement("i");
 $(i).addClass("fi-" + icon);
 this.$element.append(i);
 this.prev = null;
 this.next = null;
 this.isMoving = false;
 var element = this;
 this.$element.on("mousemove", function() {
 clearTimeout(timeOut);
 timeOut = setTimeout(function() {
 if (element.next && element.isMoving) {
 element.next.moveTo(element);
 } 
 }, 10);
 });
 }
 
 moveTo(item) {
 anime({
 targets: this.$element[0],
 left: item.$element.css("left"),
 top: item.$element.css("top"),
 duration: 700,
 elasticity: 500
 });
 if (this.next) {
 this.next.moveTo(item);
 }
 }
 
 updatePosition() { 
 anime({
 targets: this.$element[0],
 left: this.prev.$element.css("left"),
 top: this.prev.$element.css("top"),
 duration: 200
 });
 
 if (this.next) {
 this.next.updatePosition();
 }
 }
}
 
class Menu {
 constructor(menu) {
 this.$element = $(menu);
 this.size = 0;
 this.first = null;
 this.last = null;
 this.timeOut = null;
 this.hasMoved = false;
 this.status = "closed";
 }
 
 add(item) {
 var menu = this;
 if (this.first == null) {
 this.first = item;
 this.last = item;
 this.first.$element.on("mouseup", function() {
 if (menu.first.isMoving) {
 menu.first.isMoving = false; 
 } else {
 menu.click();
 }
 }); 
 item.$element.draggable(
 {
 start: function() {
 menu.close();
 item.isMoving = true;
 } 
 },
 {
 drag: function() {
 if (item.next) {
 item.next.updatePosition();
 }
 }
 },
 {
 stop: function() {
 item.isMoving = false;
 item.next.moveTo(item);
 }
 }
 );
 } else {
 this.last.next = item;
 item.prev = this.last;
 this.last = item;
 }
 this.$element.after(item.$element);
 
 
 }
 
 open() {
 this.status = "open";
 var current = this.first.next;
 var iterator = 1;
 var head = this.first;
 var sens = head.$element.css("left") < head.$element.css("right") ? 1 : -1;
 while (current != null) {
 anime({
 targets: current.$element[0],
 left: parseInt(head.$element.css("left"), 10) + (sens * (iterator * 50)),
 top: head.$element.css("top"),
 duration: 500
 });
 iterator++;
 current = current.next;
 } 
 }
 
 close() {
 this.status = "closed";
 var current = this.first.next;
 var head = this.first;
 var iterator = 1;
 while (current != null) {
 anime({
 targets: current.$element[0],
 left: head.$element.css("left"),
 top: head.$element.css("top"),
 duration: 500
 });
 iterator++;
 current = current.next;
 }
 }
 
 click() {
 if (this.status == "closed") {
 this.open();
 } else {
 this.close();
 }
 }
 
}
 
var menu = new Menu("#myMenu");
var item1 = new Item("list");
var item2 = new Item("torso", "#FF5C5C");
var item3 = new Item("social-facebook", "#5CD1FF");
var item4 = new Item("paypal", "#FFF15C");
var item5 = new Item("link", "#64F592");
 
menu.add(item1);
menu.add(item2);
menu.add(item3);
menu.add(item4);
menu.add(item5);
$(document).delay(50).queue(function(next) {
 menu.open();
 next();
 $(document).delay(1000).queue(function(next) {
 menu.close();
 next();
 });
});