[Vuejs]-Vue doesn't recognize my components, am I registering them wrong?

Your component must be wrapped in an element with the id “app”.

<div id="app">
  <all-posts />
</div>

make sure that somewhere in your posts.blade or layouts.app you have this element surrounding the code that includes your component

Try to import the components and let your Vue instance know that there are custom components. In CreatePost.vue:

import { elUpload, elDialog } from '...'; // path to your components or lib
...
export default {
...
  components: {
    elUpload,
    elDialog,
  }
...
}