拖拽

一，拖拽浏览器本身元素

 1 <!DOCTYPE html>
 2 <html lang="en">
 3 <head>
 4     <meta charset="UTF-8">
 5     <title>Title</title>
 6     <style>
 7         .container{
 8             width: 100px;
 9             height: 100px;
10             background-color: #abcdef;
11             margin-top: 5px;
12         }
13     </style>
14     <script src="../../node_modules/jqueryui/external/jquery/jquery.js"></script>
15 </head>
16 <body>
17 <div class="container">
18     <div id="text" draggable="true">drag me</div>
19 </div>
20 <div id="target-container" class="container">
21 </div>
22 <script src="main.js"></script>
23 </body>
24 </html>

 1 (function () {
 2 
 3 
 4     function addListeners() {
 5 
 6         $("#text").on("dragstart", function (e) {
 7             e.originalEvent.dataTransfer.setData("text/plain", this.id);
 8         });
 9         $(".container").on("dragover", function (e) {
10             e.preventDefault();
11         }).on("drop", function (e) {
12             e.preventDefault();
13             e.stopPropagation();
14 
15             var element = document.getElementById(e.originalEvent.dataTransfer.getData("text/plain"));
16             if (element.parentNode) {
17                 element.parentNode.removeChild(element);
18             }
19             this.appendChild(element);
20         })
21     }
22 
23     function init() {
24         addListeners();
25     }
26 
27     init();
28 })();

二，拖拽外部文件到浏览器

 1 <!DOCTYPE html>
 2 <html lang="en">
 3 <head>
 4     <meta charset="UTF-8">
 5     <title>Title</title>
 6     <style>
 7         #target{
 8             width: 400px;
 9             height: 400px;
10             background: #abcdef;
11         }
12     </style>
13 </head>
14 <body>
15 <div id="target"></div>
16 <script src="main.js"></script>
17 </body>
18 </html>

 1 (function () {
 2 
 3     var target = document.querySelector("#target");
 4 
 5     target.addEventListener("dragover", function (e) {
 6         e.preventDefault();
 7     });
 8 
 9     target.addEventListener("drop", function (e) {
10         e.preventDefault();
11 
12         var files = e.dataTransfer.files;
13         var reader;
14 
15         if (files && files.length) {
16             var file = files[0];
17             switch (file.type) {
18                 case "text/plain":
19                     reader=new FileReader();
20                     reader.onload=function () {
21                       target.innerHTML=reader.result;
22                     };
23                     reader.readAsText(file);
24                     break;
25                 case "image.jpeg":
26                 case "image.jpg":
27                     reader=new FileReader();
28                     reader.onload=function () {
29                       target.innerHTML="<img src='"+reader.result+"'>";
30                     };
31                     reader.readAsDataURL(file);
32                     break;
33                 default:
34                     console.log(file);
35                     break;
36             }
37         }
38     });
39 })();