trigger update on v-html from javascript

[macfire]

How can I trigger an update on v-html when the v-model (text area) is updated from a script?
In my case, the textarea (with v-model) is populated from an ajax callback successfully, but the v-html doesn't update until I type in the textarea.

After reading issue #372, I hoped triggering a change event on the textarea would refresh the v-html -- but no success.

<div id="editor">
  <textarea v-model="input"></textarea>
  <div v-html="input | marked"></div>
</div>

<script>
new Vue({
  el: '#editor',
  filters: {
    marked: marked
  }
})
</script>

[macfire]

After getting some lunch, I realized I was taking the wrong approach.

I changed my code to update the $data.input, which then updated both the v-model and v-html.
First, I assigned the Vue object to a variable in order to target.

<div id="editor">
  <textarea v-model="input"></textarea>
  <div v-html="input | marked"></div>
</div>

<script>
var $vm = new Vue({
  el: '#editor',
  filters: {
    marked: marked
  }
})

// pseudo-code:
function myAjaxCallback(myajaxdata) {
    $vm.$data.input = myajaxdata[0].myfield;
}
</script>