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34 lines
1.2 KiB
34 lines
1.2 KiB
<div class="apiDetail">
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<div>
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<h2><span>Function(treeId, treeNode)</span><span class="path">setting.callback.</span>beforeExpand</h2>
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<h3>Overview<span class="h3_info">[ depends on <span class="highlight_green">jquery.ztree.core</span> js ]</span></h3>
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<div class="desc">
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<p></p>
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<div class="longdesc">
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<p>Specify callback function to be called before expanding a node, The return value controls the expand node callback.</p>
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<p>Default: null</p>
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</div>
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</div>
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<h3>Function Parameter Descriptions</h3>
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<div class="desc">
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<h4><b>treeId</b><span>String</span></h4>
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<p>zTree unique identifier: <b class="highlight_red">treeId</b>.</p>
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<h4 class="topLine"><b>treeNode</b><span>JSON</span></h4>
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<p>JSON data object of the node to be expanded</p>
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<h4 class="topLine"><b>Return </b><span>Boolean</span></h4>
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<p>return true or false</p>
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<p class="highlight_red">If return false, zTree will not expand node, and will not trigger the 'onExpand' callback.</p>
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</div>
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<h3>Examples of setting & function</h3>
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<h4>1. disables expanding of all nodes</h4>
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<pre xmlns=""><code>function myBeforeExpand(treeId, treeNode) {
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return false;
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};
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var setting = {
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callback: {
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beforeExpand: myBeforeExpand
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}
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};
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......</code></pre>
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</div>
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</div> |