Question

以下Javascript代码链接到HTML文件。文件显示意外标识符错误。有人可以帮我吗？我已使用interactJS来调整类resize-drag中的元素的大小。我已经包含了HTML，CSS和Javascript文件。我只是想实现Interact.js网站本身上的调整大小示例。

interact('.resize-drag')
  .draggable({
    onmove: window.dragMoveListener,
    modifiers: [
      interact.modifiers.restrict({
        restriction: 'parent',
        elementRect: { top: 0, left: 0, bottom: 1, right: 1 }
      })
    ]
  })
  .resizable({
    // resize from all edges and corners
    edges: { left: true, right: true, bottom: true, top: true },

    modifiers: [
      // keep the edges inside the parent
      interact.modifiers.restrictEdges({
        outer: 'parent',
        endOnly: true,
      }),

      // minimum size
      interact.modifiers.restrictSize({
        min: { width: 100, height: 50 },
      }),
    ],

    inertia: true
  })
  .on('resizemove', function (event) {
    var target = event.target,
        x = (parseFloat(target.getAttribute('data-x')) || 0),
        y = (parseFloat(target.getAttribute('data-y')) || 0);

    // update the element's style
    target.style.width  = event.rect.width + 'px';
    target.style.height = event.rect.height + 'px';

    // translate when resizing from top or left edges
    x += event.deltaRect.left;
    y += event.deltaRect.top;

    target.style.webkitTransform = target.style.transform =
        'translate(' + x + 'px,' + y + 'px)';

    target.setAttribute('data-x', x);
    target.setAttribute('data-y', y);
    target.textContent = Math.round(event.rect.width) + '\u00D7' + Math.round(event.rect.height);
  });

HTML文件

<!DOCTYPE html5>
<html>
<head>
    <link rel="stylesheet" type="text/css" href="drag.css">
     <script type="text/javascript" src="https://cdn.jsdelivr.net/npm/interact-js@2.1.0/interact.min.js"></script>
     <script type="text/javascript" src = "drag.js"></script>

    <title>Drag and drop</title>
</head>
<body>

<div class="resize-container">
  <div class="resize-drag">
       </div>
</div>
</body>
</html>

CSS文件：

.resize-drag {
  background-color: #29e;
  color: white;
  font-size: 20px;
  font-family: sans-serif;
  border-radius: 8px;
  padding: 20px;
  margin: 30px 20px;
  touch-action: none;

  width: 120px;

  /* This makes things *much* easier */
  box-sizing: border-box;
}

.resize-container {
  display: inline-block;
  width: 100%;
  height: 240px;
}

Answer 1

对于任何想知道错误是什么的人，javascript代码都没有定义dragMoveListener函数（此函数在draggable方法的object参数上调用）

此修复程序只是定义和“激活”功能。幸运的是，官方文档提供了该功能。只需将其放在文件开头：


function dragMoveListener (event) {
    var target = event.target
    // keep the dragged position in the data-x/data-y attributes
    var x = (parseFloat(target.getAttribute('data-x')) || 0) + event.dx
    var y = (parseFloat(target.getAttribute('data-y')) || 0) + event.dy

    // translate the element
    target.style.webkitTransform =
        target.style.transform =
            'translate(' + x + 'px, ' + y + 'px)'

    // update the posiion attributes
    target.setAttribute('data-x', x)
    target.setAttribute('data-y', y)
}


window.dragMoveListener = dragMoveListener

使用Interact JS调整大小

1 个答案: