documentation error in computed properties vs watch

[arumals]

http://vuejs.org/guide/computed.html

I think

var vm = new Vue({
  data: {
    firstName: 'Foo',
    lastName: 'Bar',
    fullName: 'Foo Bar'
  }
})

should be...

var vm = new Vue({
  el: "#demo",
  data: {
    firstName: 'Foo',
    lastName: 'Bar',
    fullName: 'Foo Bar'
  }
})

[azamat-sharapov]

It's just an example showing highlights, not a code to copy paste I think..

[yyx990803]

Vue instance don't need el to observe its data, so this is intended.