SOURCE

var yox = new Yox({
  el: '#app',
  template: '#template',
  data: {
    name: 'yox'
  },
  filters: {
    toUpper: function (value) {
      return value.toUpperCase()
    }
  }
})

<div id="app"></div>
<script id="template" type="text/plain">
	<div>
    <p>
    	<!-- 等价于 name.toUpperCase.call(yox) -->
    	{{name.toUpperCase()}}
    </p>
    
    <p>
    	{{toUpper(name)}}
    </p>
  </div>
</script>