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放入javascript的div

drag-and-drop html javascript

irongirl · 技术社区 · 9 年前

Javascript代码:

var dragItem1 = document.getElementById("drag1");
                var dropdiv1 = document.getElementById("div1");

                //event will be fired when a user starts dragging the item
                dragItem1.ondragstart = function (evt) {
                    evt.dataTransfer.setData('key1', evt.target.id);
                    console.log("its dragging..");
                }

                //event will be fired when an element is selected and dragged over a drop location
                dropdiv1.ondragover = function (evt) {
                    evt.preventDefault();
                    console.log("it's dragover..");
                }

                //event will be fired when you drop dragged item on drop location
                dropdiv1.ondrop = function (evt) {
                    evt.preventDefault();
                    var dropItem1 = evt.dataTransfer.getData('key1');
                    console.log(evt);
                    console.log("its dropped..");
                    console.log(dropItem1);
                    var myElement1 = document.getElementById(dropItem1);
                    console.log(myElement1);
                    var myNewElement = document.createElement('img');
                    myNewElement.src = myElement1.src;
                    console.log(myNewElement);
                }

HTML代码:

<img id="drag1" draggable="true" src="images/equation1_3.png">

<div class="boxFirstCol box1 b1 box" id="div1" ondrop="ondrop(event)" ondragover="allowDrop(event)"> </div>

2 回复 | 直到 9 年前

Lasitha Petthawadu 9 年前

使用 document.getElementById("div1").appendChild(myNewElement); 将元素添加到放置位置。

var dragItem1 = document.getElementById("drag1");
                var dropdiv1 = document.getElementById("div1");

                //event will be fired when a user starts dragging the item
                dragItem1.ondragstart = function (evt) {
                    evt.dataTransfer.setData('key1', evt.target.id);
                    
                }

                //event will be fired when an element is selected and dragged over a drop location
                dropdiv1.ondragover = function (evt) {
                    evt.preventDefault();
                  
                }

                //event will be fired when you drop dragged item on drop location
                dropdiv1.ondrop = function (evt) {
                    evt.preventDefault();
                    var dropItem1 = evt.dataTransfer.getData('key1');
                   
                    var myElement1 = document.getElementById(dropItem1);
                    console.log(myElement1);
                    var myNewElement = document.createElement('img');
                    var myNewElement
                    myNewElement.src = myElement1.src;
                    document.getElementById("div1").appendChild(myNewElement);

                }

<img id="drag1" draggable="true" src="http://www.icon2s.com/img64/64x64-animal-icon-hamster.png">

<div style="background-color:red;width:200px;height:200px;" id="div1" ondrop="ondrop(event)" ondragover="allowDrop(event)"> </div>

guest271314 9 年前

您可以使用 .appendChild() <img> 元素到 event.target 在内部 drop 事件处理程序。

dropdiv1.ondrop = function(evt) {
  evt.preventDefault();
  var dropItem1 = evt.dataTransfer.getData('key1');
  console.log(evt);
  console.log("its dropped..");
  console.log(dropItem1);
  var myElement1 = document.getElementById(dropItem1);
  console.log(myElement1);
  var myNewElement = document.createElement('img');
  myNewElement.src = myElement1.src;
  console.log(myNewElement);
  evt.target.appendChild(myNewElement); // append `<img>` to `<div>`
}

http://plnkr.co/edit/OndnpzsIJjTjhbiNbhUc?p=preview