Codemirror Directive for Vue JS

v-codemirror.js

Vue.directive('codemirror', {
  twoWay : true,
  bind : function () {
    this.codemirror = CodeMirror(this.el, {
        mode : "markdown",
        tabMode : "indent",
        lineWrapping : !0
    });

    this.codemirror.on("change", function () {
        this.set(this.codemirror.getValue());
    }.bind(this));
  },
  update: function (value, oldValue) {
    this.codemirror.setValue(value || '');
  }
});

// show it in the template!
<div v-codemirror="post.content"></div>
    

Should you not call toTextArea() in unbind to clean up?