A custom directive similar to v-if in vuejs

Question

I\'m writing a custom directive in vue.

I want it to work like v-if but it will have a little logic going inside it. Let me explain with an example:

Answer 1

Try to use this hack:

Vue.directive('permission', (el, binding, vnode) => {
  if (!isUserGranted(binding.value)) {
    // replace HTMLElement with comment node
    const comment = document.createComment(' ');
    Object.defineProperty(comment, 'setAttribute', {
      value: () => undefined,
    });
    vnode.elm = comment;
    vnode.text = ' ';
    vnode.isComment = true;
    vnode.context = undefined;
    vnode.tag = undefined;
    vnode.data.directives = undefined;

    if (vnode.componentInstance) {
      vnode.componentInstance.$el = comment;
    }

    if (el.parentNode) {
      el.parentNode.replaceChild(comment, el);
    }
  }
});

UPD 05-19-2017: My latest code. I define setAttribute() and check for vnode.componentInstance to prevent js errors when using with both html elements and Vue components.