Question

我目前具有拖放功能，可将图像分为三个div，我的问题是div尺寸如何适应插入到其上的图像，因此所有图像都只能放在一个框中。

是否还可以仅附加每个图像的替代项，以使每个人都适合？

<!DOCTYPE HTML>
<html>
<head>
<style>
div {
  width: 350px;
  height: 70px;
  padding: 10px;
  border: 1px solid #aaaaaa;
}
</style>
<script>
function allowDrop(ev) {
  ev.preventDefault();
}

function drag(ev) {
  ev.dataTransfer.setData("text", ev.target.id);
}

function drop(ev) {
  ev.preventDefault();
  var data = ev.dataTransfer.getData("text");
  ev.target.appendChild(document.getElementById(data));
}
</script>
</head>
<body>


<div id="div1" ondrop="drop(event)" ondragover="allowDrop(event)"></div>
<div id="div2" ondrop="drop(event)" ondragover="allowDrop(event)"></div>
<div id="div3" ondrop="drop(event)" ondragover="allowDrop(event)"></div>
<br>
<img id="drag1" src="img_logo.gif" draggable="true" ondragstart="drag(event)" width="336" height="69">
  <img id="drag2" src="img_logo.gif" draggable="true" ondragstart="drag(event)" width="336" height="69">
  <img id="drag3" src="img_logo.gif" draggable="true" ondragstart="drag(event)" width="336" height="69">


</body>
</html>

Answer 1

使用javascript删除图片后，您可以设置div尺寸，只需从css中删除填充，以便div可以适合图片，请参见

function allowDrop(ev) {
  ev.preventDefault();
}

function drag(ev) {
  //console.log(ev.target.id)
  ev.dataTransfer.setData("text", ev.target.id);
}

function drop(ev) {
  ev.preventDefault();
  var data = ev.dataTransfer.getData("text");
  var img = document.getElementById(data);
  ev.target.appendChild(img);

  //set the div width & height aacording to the image width
  ev.target.style.width = parseInt(img.width) + 'px';
  ev.target.style.height = parseInt(img.height) + 'px';
}

div {
  border: 1px solid #aaaaaa;
  width: 350px;
  height: 70px;
}

<div id="div1" ondrop="drop(event)" ondragover="allowDrop(event)"></div>
<br/>
<div id="div2" ondrop="drop(event)" ondragover="allowDrop(event)"></div>
<br/>
<div id="div3" ondrop="drop(event)" ondragover="allowDrop(event)"></div>
<br>
<img id="drag1" src="https://images.unsplash.com/photo-1507146426996-ef05306b995a?ixlib=rb-1.2.1&ixid=eyJhcHBfaWQiOjEyMDd9&auto=format&fit=crop&w=336&q=69" draggable="true" ondragstart="drag(event)">
<img id="drag2" src="https://images.pexels.com/photos/33053/dog-young-dog-small-dog-maltese.jpg?auto=compress&cs=tinysrgb&dpr=2&w=336&h=69" draggable="true" ondragstart="drag(event)">
<img id="drag3" src="https://images.pexels.com/photos/257540/pexels-photo-257540.jpeg?auto=compress&cs=tinysrgb&h=69&w=336" draggable="true" ondragstart="drag(event)">

转移时调整HTML5拖放使Div调整

1 个答案: