HTML Template

HTML template should refer to native HTML, mounted to the Vue instance through el. As mentioned in the DOM-Template Parsing Instructions chapter, there are some limitations of HTML template parsing

<table>
  <my-row>...</my-row>
</table>

https://jsfiddle.net/hugaungj...

String Template

ie JavaScript inline template string

Vue.component('my-component', {
  template: '<p>A custom component!</p>'
})

They don’t refer to the same thing.