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| | | <div class="apiDetail"> |
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| | | <div> |
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| | | <h2><span>Function(treeId, treeNode)</span><span class="path">setting.callback.</span>beforeAsync</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>This callback is made before zTree makes an ajax request, giving you an opportunity to decide if it should proceed or not. |
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| | | Return false to prevent zTree from sending the ajax request.</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 parent node</p> |
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| | | <p class="highlight_red">When asynchronously loading the root, treeNode = null</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 the function returns false, zTree will not send the ajax request, and will not trigger the 'onAsyncSuccess / onAsyncError' callback.</p> |
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| | | </div> |
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| | | <h3>Examples of setting & function</h3> |
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| | | <h4>1. If the parent node's attribute 'id' is 1, don't send the ajax request.</h4> |
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| | | <pre xmlns=""><code>function myBeforeCallBack(treeId, treeNode) { |
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| | | return (treeNode.id !== 1); |
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| | | }; |
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| | | var setting = { |
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| | | callback: { |
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| | | beforeAsync: myBeforeCallBack |
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| | | } |
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| | | }; |
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| | | ......</code></pre> |
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| | | </div> |
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| | | </div> |
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