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我对Gridstack和Knockout JS比较陌生。

过去几天试图弄清楚为什么在调整浏览器大小时没有正确删除小部件。

注意：此问题发生在所有浏览器上。

场景 A： “不调整浏览器大小”

这是代码的初始显示

当浏览器大小未更改时，我可以删除小部件。

场景 B： “浏览器调整大小（垂直）”

添加小部件后（或者您可以刷新浏览器以再次显示默认值），我已经垂直调整了浏览器的大小。

小部件重新对齐

当我在重新对齐后尝试删除小部件时，它没有被删除，这很奇怪。

这是 Gridstack 或 Knockout 的已知问题吗？

非常感谢任何帮助。

这里的代码：

<!DOCTYPE html>
<html lang="en">

<head>

  <meta charset="utf-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <title>Investigation Sample 1</title>

  <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.2.0/css/bootstrap.min.css">
  <link rel="stylesheet" href="https://github.com/troolee/gridstack.js/tree/master/dist/gridstack.css" />

  <script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"></script>
  <script src="https://cdnjs.cloudflare.com/ajax/libs/jqueryui/1.11.0/jquery-ui.js"></script>
  <script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.2.0/js/bootstrap.min.js"></script>
  <script src="https://cdnjs.cloudflare.com/ajax/libs/lodash.js/3.5.0/lodash.min.js"></script>
  <script src="https://cdnjs.cloudflare.com/ajax/libs/knockout/3.2.0/knockout-min.js"></script>
  <script src="https://github.com/troolee/gridstack.js/tree/master/dist/gridstack.js"></script>
  <script src="https://github.com/troolee/gridstack.js/tree/master/dist/gridstack.jQueryUI.js"></script>

  <style type="text/css">
    .grid-stack {
      background: lightgoldenrodyellow;
    }
    
    .grid-stack-item-content {
      color: #2c3e50;
      text-align: center;
      background-color: #18bc9c;
    }
  </style>

</head>

<body>

  <div class="container-fluid">

    <h1> Investigation Sample 1</h1>

    <div>
      <button data-bind="click: addNewWidget">Add new widget</button>
    </div>

    <br>

    <div data-bind="component: {name: 'dashboard-grid', params: $data}"></div>

  </div>

  <script type="text/javascript">
    ko.components.register('dashboard-grid', {
      viewModel: {
        createViewModel: function(controller, componentInfo) {

          var ViewModel = function(controller, componentInfo) {

            var grid = null;

            this.widgets = controller.widgets;

            this.afterAddWidget = function(items) {

              if (grid == null) {
                grid = $(componentInfo.element).find('.grid-stack').gridstack({
                  auto: false
                }).data('gridstack');
              }

              var item = _.find(items, function(i) {
                return i.nodeType == 1
              });
              grid.addWidget(item);
              ko.utils.domNodeDisposal.addDisposeCallback(item, function() {
                grid.removeWidget(item);
              });
            };
          };
          return new ViewModel(controller, componentInfo);
        }
      },
      template: [
        '<div class="grid-stack" data-bind="foreach: {data: widgets, afterRender: afterAddWidget}">',
        '   <div class="grid-stack-item" data-bind="attr: {\'data-gs-x\': $data.x, \'data-gs-y\': $data.y, \'data-gs-width\': $data.width, \'data-gs-height\': $data.height, \'data-gs-auto-position\': $data.auto_position}">',
        '       <div class="grid-stack-item-content"><button data-bind="click: $root.deleteWidget">Delete Button</button></div>',
        '   </div>',
        '</div> '
      ].join('')

    });

    $(function() {
      var Controller = function(widgets) {
        var self = this;

        this.widgets = ko.observableArray(widgets);

        this.addNewWidget = function() {
          this.widgets.push({
            x: 0,
            y: 0,
            //width: Math.floor(1 + 3 * Math.random()),
            //height: Math.floor(1 + 3 * Math.random()),
            width: 2,
            height: 3,
            auto_position: true
          });
          return false;
        };

        this.deleteWidget = function(item) {
          self.widgets.remove(item);
          return false;
        };
      };

      var widgets = [{
          x: 0,
          y: 0,
          width: 2,
          height: 2
        },
        {
          x: 2,
          y: 0,
          width: 4,
          height: 2
        },
        {
          x: 6,
          y: 0,
          width: 2,
          height: 4
        },
        {
          x: 1,
          y: 2,
          width: 4,
          height: 2
        }
      ];

      var controller = new Controller(widgets);
      ko.applyBindings(controller);
    });
  </script>

</body>

</html>

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