Image url field name.
Examples
Default HTML Field Name
<div id="tree"></div>
<script>
var tree = $('#tree').tree({
dataSource: [ { text: 'World', imageUrl: 'http://gijgo.com/content/icons/world-icon.png', children: [ { text: 'USA', imageUrl: 'http://gijgo.com/content/icons/usa-oval-icon.png' } ] } ]
});
</script>
Custom HTML Field Name
<div id="tree"></div>
<script>
var tree = $('#tree').tree({
imageUrlField: 'icon',
dataSource: [ { text: 'World', icon: 'http://gijgo.com/content/icons/world-icon.png', children: [ { text: 'USA', icon: 'http://gijgo.com/content/icons/usa-oval-icon.png' } ] } ]
});
</script>