Image html field name.
Examples
Default HTML Field Name
<div id="tree"></div>
<script>
var tree = $('#tree').tree({
dataSource: [ { text: 'folder', imageHtml: '<i class="material-icons">folder</i>', children: [ { text: 'file', imageHtml: '<i class="material-icons">insert_drive_file</i>' } ] } ]
});
</script>
Custom HTML Field Name
<div id="tree"></div>
<script>
var tree = $('#tree').tree({
imageHtmlField: 'icon',
dataSource: [ { text: 'folder', icon: '<i class="material-icons">folder</i>', children: [ { text: 'file', icon: '<i class="material-icons">insert_drive_file</i>' } ] } ]
});
</script>