Why is the vue component not working?

Question

Vue.js

Hello. I'm starting to learn vue.js. I do not understand why the example from the documentation does not work.
I define a component

Vue.component('todo-item', {
  template: '<li>Это todo</li>'
})

I insert a component

<ul>
  <todo-item></todo-item>
</ul>

In theory, the template of the component should appear. But for some reason it doesn't work.. https://jsfiddle.net/50wL7mdz/42456/
What am I doing wrong?

Answer 1

You have created a component for vue but have not instantiated the vue itself: https://jsfiddle.net/nu41bvfq/