IE11的Javascript问题

用户名

直到IE9，我的应用程序都可以正常工作，现在，当我将其升级到IE11时，它就停止了工作。这是一个示例html和js。

问题

在第一次运行即。加载时效果很好。但是，当我选择PDA品牌时，第二个下拉菜单的所有选项均变为空白。

在控制台中Invalid Calling Object error，object上存在脚本错误clonedOptions。

function dynamicSelect(id1, id2) {
  //alert("Everytime")
  // Browser and feature tests to see if there is enough W3C DOM support

  // Obtain references to both select boxes
  var sel1 = document.getElementById(id1);
  var sel2 = document.getElementById(id2);
  // Clone the dynamic select box
  var clone = sel2.cloneNode(true);
  // Obtain references to all cloned options
  var clonedOptions = clone.getElementsByTagName("option");
  // Onload init: call a generic function to display the related options in the dynamic select box
  refreshDynamicSelectOptions(sel1, sel2, clonedOptions);
  // Onchange of the main select box: call a generic function to display the related options in the dynamic select box

  sel1.onchange = function() {
    refreshDynamicSelectOptions(sel1, sel2, clonedOptions);
  };
}

function refreshDynamicSelectOptions(sel1, sel2, clonedOptions) {
  while (sel2.options.length) {
    sel2.remove(0);
  }

  //alert(sel1.options[sel1.selectedIndex].value)

  // Create regular expression objects for "select" and the value of the selected option of the main select box as class names
  var pattern1 = /( |^)(select)( |$)/;
  var pattern2 = new RegExp("( |^)(" + sel1.options[sel1.selectedIndex].value + ")( |$)");
  // Iterate through all cloned options
  //alert(clonedOptions.length);
  for (var i = 0; i < clonedOptions.length; i++) {
    // If the classname of a cloned option either equals "select" or equals the value of the selected option of the main select box

    if (clonedOptions[i].className.match(pattern1) || clonedOptions[i].className.match(pattern2)) {
      // Clone the option from the hidden option pool and append it to the dynamic select box
      //alert("Did match")

      sel2.appendChild(clonedOptions[i].cloneNode(true));
      //alert(sel2.options[1]);
    }
  }
}

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" lang="en" xml:lang="en">

<head>
  <title>dynamic selectbox example</title>
  <script type="text/javascript" src="unobtrusivedynamicselect_ex5.js"></script>
</head>

<body>
  <form action="#">
    <div>
      <select id="pda-brand">
        <option value="select">Select PDA brand...</option>
        <option value="dell">Dell</option>
        <option value="hp">HP</option>
        <option value="palmone">PalmOne</option>
      </select>
      <select id="pda-type">
        <option class="select" value="select">Select PDA type...</option>
        <option class="dell" value="aximx30">Axim X30</option>
        <option class="dell" value="aximx50">Axim X50</option>
        <option class="hp" value="ipaqhx2750">iPAQ hx2750</option>
        <option class="hp" value="ipaqrx3715">iPAQ rx3715</option>
        <option class="hp" value="ipaqrz1710">iPAQ rz1710</option>
        <option class="palmone" value="tungstene2">Tungsten E2</option>
        <option class="palmone" value="tungstent5">Tungsten T5</option>
        <option class="palmone" value="zire72">Zire 72</option>
      </select>
      <script type="text/javascript">
        window.onload = function(e) {
          dynamicSelect("pda-brand", "pda-type");
        }
      </script>
    </div>
  </form>
</body>

</html>

问题线

在下面的位置中，对于clonedOptions，我收到了无效的调用对象错误。

for (var i = 0; i < clonedOptions.length; i++) {

Sabithpocker

我可以在IE-11中使用此功能，请自己尝试。

根据我的理解，问题是：

var clone = sel2.cloneNode(true);
var clonedOptions = clone.getElementsByTagName("option");

clonedOptions可能是对clone标记名称为的子代的引用option

  sel1.onchange = function() {
    refreshDynamicSelectOptions(sel1, sel2, clonedOptions);
  };

在此函数中，有引用clonedOptions，但没有引用clone。cloneIE找不到任何保留它的理由，所以很可能是因为垃圾收集。clonedOptions保留对不存在的集合的引用。

您可以用自己的方式纠正，我只是通过clone而不是，clonedOptions它对我有效IE11

function dynamicSelect(id1, id2) {
  //alert("Everytime")
  // Browser and feature tests to see if there is enough W3C DOM support

  // Obtain references to both select boxes
  var sel1 = document.getElementById(id1);
  var sel2 = document.getElementById(id2);
  // Clone the dynamic select box      // Obtain references to all cloned options
  var clone = sel2.cloneNode(true);
  // Onload init: call a generic function to display the related options in the dynamic select box
  refreshDynamicSelectOptions(sel1, sel2, clone);
  // Onchange of the main select box: call a generic function to display the related options in the dynamic select box

  sel1.onchange = function() {
    refreshDynamicSelectOptions(sel1, sel2, clone);
  };
}

function refreshDynamicSelectOptions(sel1, sel2, clone) {
  var clonedOptions = clone.getElementsByTagName("option");
  while (sel2.options.length) {
    sel2.remove(0);
  }

  //alert(sel1.options[sel1.selectedIndex].value)

  // Create regular expression objects for "select" and the value of the selected option of the main select box as class names
  var pattern1 = /( |^)(select)( |$)/;
  var pattern2 = new RegExp("( |^)(" + sel1.options[sel1.selectedIndex].value + ")( |$)");
  // Iterate through all cloned options
  //alert(clonedOptions.length);
  for (var i = 0; i < clonedOptions.length; i++) {
    // If the classname of a cloned option either equals "select" or equals the value of the selected option of the main select box

    if (clonedOptions[i].className.match(pattern1) || clonedOptions[i].className.match(pattern2)) {
      // Clone the option from the hidden option pool and append it to the dynamic select box
      //alert("Did match")

      sel2.appendChild(clonedOptions[i].cloneNode(true));
      //alert(sel2.options[1]);
    }
  }
}

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" lang="en" xml:lang="en">

<head>
  <title>dynamic selectbox example</title>
  <script type="text/javascript" src="unobtrusivedynamicselect_ex5.js"></script>
</head>

<body>
  <form action="#">
    <div>
      <select id="pda-brand">
        <option value="select">Select PDA brand...</option>
        <option value="dell">Dell</option>
        <option value="hp">HP</option>
        <option value="palmone">PalmOne</option>
      </select>
      <select id="pda-type">
        <option class="select" value="select">Select PDA type...</option>
        <option class="dell" value="aximx30">Axim X30</option>
        <option class="dell" value="aximx50">Axim X50</option>
        <option class="hp" value="ipaqhx2750">iPAQ hx2750</option>
        <option class="hp" value="ipaqrx3715">iPAQ rx3715</option>
        <option class="hp" value="ipaqrz1710">iPAQ rz1710</option>
        <option class="palmone" value="tungstene2">Tungsten E2</option>
        <option class="palmone" value="tungstent5">Tungsten T5</option>
        <option class="palmone" value="zire72">Zire 72</option>
      </select>
      <script type="text/javascript">
        window.onload = function(e) {
          dynamicSelect("pda-brand", "pda-type");
        }
      </script>
    </div>
  </form>
</body>

</html>