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<div class="apiDetail">
<div>
<h2><span class="path">setting.callback.</span>onAsyncError</h2>
<h2><span>Function(event, treeId, treeNode, XMLHttpRequest, textStatus, errorThrown)</span> </h2>
<h3>概述<span class="h3_info">[ 依赖 <span class="highlight_green">jquery.ztree.core</span> 核心 js ]</span></h3>
<div class="desc">
<p></p>
<div class="longdesc">
<p>用于捕获异步加载出现异常错误的事件回调函数</p>
<p class="highlight_red">如果设置了 setting.callback.beforeAsync 方法，且返回 false，将无法触发 onAsyncSuccess / onAsyncError 事件回调函数。</p>
<p>默认值：null</p>
</div>
</div>
<h3>Function 参数说明</h3>
<div class="desc">
<h4><b>event</b><span>js event 对象</span></h4>
<p>标准的 js event 对象</p>
<h4 class="topLine"><b>treeId</b><span>String</span></h4>
<p>对应 zTree 的 <b class="highlight_red">treeId</b>，便于用户操控</p>
<h4 class="topLine"><b>treeNode</b><span>JSON</span></h4>
<p>进行异步加载的父节点 JSON 数据对象</p>
<p class="highlight_red">针对根进行异步加载时，treeNode = null</p>
<h4 class="topLine"><b>XMLHttpRequest</b><span>String</span></h4>
<p>标准 XMLHttpRequest 对象，请参考 JQuery API 文档。</p>
<h4 class="topLine"><b>textStatus</b><span>String</span></h4>
<p>请求状态：success，error，请参考 JQuery API 文档。</p>
<h4 class="topLine"><b>errorThrown</b><span>String</span></h4>
<p>errorThrown 只有当异常发生时才会被传递，请参考 JQuery API 文档。</p>
</div>
<h3>setting & function 举例</h3>
<h4>1. 异步加载出现异常后，弹出错误信息</h4>
<pre xmlns=""><code>function zTreeOnAsyncError(event, treeId, treeNode, XMLHttpRequest, textStatus, errorThrown) {
alert(XMLHttpRequest);
};
var setting = {
callback: {
onAsyncError: zTreeOnAsyncError
}
};
......</code></pre>
</div>
</div>
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