Set Expand On Hover

The wijtree widget allows you to set its options so the nodes will expand when a user hovers over them with the mouse. See the Expand on Hover > Tree sample of the MVC Control Explorer live demos at http://demo.componentone.com/ASPNET/MVCExplorer/tree/ExpandonHover.

Create an ASP.NET MVC 5 Wijmo application.
In the Solution Explorer, expand the Views | Shared folder and double-click _Layout.cshtml to open the file.

Add the following markup within the <body> tags of the page.

<div>
        <ul id="tree">
            <li class="folder"><a><span>Folder 1</span></a>
                <ul>
                    <li class="folder"><a><span>Folder 1.1</span></a>
                        <ul>
                            <li class="file"><a><span>File 1.1</span></a></li>
                            <li class="file"><a><span>File 1.2</span></a></li>
                            <li class="file"><a><span>File 1.3</span></a></li>
                            <li class="file"><a><span>File 1.4</span></a></li>
                            <li class="file"><a><span>File 1.5</span></a></li>
                        </ul>
                    </li>
                    <li class="file"><a><span>File 1.2</span></a></li>
                    <li class="file"><a><span>File 1.3</span></a></li>
                    <li class="file"><a><span>File 1.4</span></a></li>
                    <li class="file"><a><span>File 1.5</span></a></li>
                </ul>
            </li>
            <li class="folder"><a><span>Folder 2</span></a>
                <ul>
                    <li class="file"><a><span>File 2.1</span></a></li>
                    <li class="file"><a><span>File 2.2</span></a></li>
                    <li class="file"><a><span>File 2.3</span></a></li>
                    <li class="file"><a><span>File 2.4</span></a></li>
                    <li class="file"><a><span>File 2.5</span></a></li>
                </ul>
            </li>
            <li class="folder"><a><span>Folder 3</span></a>
                <ul>
                    <li class="file"><a><span>File 3.1</span></a></li>
                    <li class="file"><a><span>File 3.2</span></a></li>
                    <li class="file"><a><span>File 3.3</span></a></li>
                    <li class="file"><a><span>File 3.4</span></a></li>
                    <li class="file"><a><span>File 3.5</span></a></li>
                </ul>
            </li>
        </ul>
    </div>

Use the following script to initialize the widget:

<script id="scriptInit" type="text/javascript">
     $(document).ready(function () {
         var tv = $("#tree").wijtree({
             expandCollapseHoverUsed: true,
             expandAnimation: {},
             collapseAnimation: {}
         });
     });      
    </script>

Run the project. When you hover over one of the nodes, it should open: