`<input id="dayparting_switch"
  v-model="options.dayparting"
  v-observe="options.dayparting"
  :cheked="options.dayparting"
data-off="Disabled" data-on="Enabled" data-toggle="toggle" type="checkbox">`

Vue.directive('observe', {
  // in the bind function, the 3rd argument is vnode (the VDOM) created by Vue.
  bind(el, bindings, vnode) {
   // vnode.context is the scope where the directive is rendered.
   const vm = vnode.context
   $(el).change(function() {
     vm.$data = 'changed';
   });
  }
});