tba-gx-guochan/public/static/plugins/zTree_v3/api/en/treeNode.icon.html

<div class="apiDetail">
    <div>
        <h2><span>String</span><span class="path">treeNode.</span>icon</h2>
        <h3>Overview<span class="h3_info">[ depends on <span
                class="highlight_green">jquery.ztree.core</span> js ]</span></h3>
        <div class="desc">
            <p></p>
            <div class="longdesc">
                <p>URL path of node's custom icon.</p>
                <p class="highlight_red">1. If you only set the 'icon' attribute to parent node, the parent node will
                    only show one icon when it is expanded or collapsed.</p>
                <p class="highlight_red">2. If you need to show two icons when it is expanded or collapsed, please set
                    the 'treeNode.iconOpen' and 'treeNode.iconClose' attribute.</p>
                <p class="highlight_red">3. If you need to use css to set the custom icon, please set the
                    'treeNode.iconSkin' attribute.</p>
                <p>Default: undefined</p>
            </div>
        </div>
        <h3>String Format</h3>
        <div class="desc">
            <p>Icon image url can be a relative path or absolute path.</p>
            <p class="highlight_red">If use a relative path, please note the relationship between icon image and the
                page, ensure the correct image path.</p>
        </div>
        <h3>Examples of treeNode</h3>
        <h4>1. Set the custom icon</h4>
        <pre xmlns=""><code>var nodes = [
	//Only show one icon when it is expanded or collapsed.
	{ name:"Parent Node 1", icon:"/img/parent.gif"},

	//Show two icons when it is expanded or collapsed.
	{ name:"Parent Node 2", iconOpen:"/img/open.gif", iconClose:"/img/close.gif"},

	//the custom icon for leaf node
	{ name:"Leaf Node", icon:"/img/leaf.gif"}
]</code></pre>
    </div>
</div>