SOURCE

new Yox({
  el: '#app',
  template: '#template',
  data: {
    level: 1,
    name: '1',
    children: [
      {
        level: 2,
        name: '1',
        children: [
          {
            level: 3,
            name: '1',
          }
        ]
      },
      {
        level: 2,
        name: '2',
        children: [
          {
            level: 3,
            name: '1',
          }
        ]
      }
    ]
  },
  methods: {
    print: function (keypath) {
  		console.log(keypath)
		}
  }
})

<div id="app"></div>
<script id="template" type="text/plain">
	<div>
    {{#partial node}}
    	<p>
      	level: {{this.level}}<br>
        name: {{this.name}}<br>
        
        <button on-click="print($keypath)">
        	print
        </button>
        
        {{#each this.children}}
        	{{> node}}
        {{/each}}
      </p>
    {{/partial}}
    
    {{> node}}
  </div>
</script>