Way of Extend a '.vue' File Component

extend-a-vue-file-component.md

It not a good practise,you should alway use mixin as you can.

• Say that your have a 3rd party component fits your need 90%
• Only a bit of code you want to customize, maybe just the html layout
• The component doesn't have a option for that
• the component is a '.vue' import by vue-loader so you can't OtherComponent.extend

  import OtherComponent from 'OtherComponent'
  Vue.extend(OtherComponent).extend({
    methods: codeThatDoesNotFitYourNeed(){
      // customize code
    }
  })