var author = Vue.extend({
 template: "<p><a :href='url'>{{author}}</a></p>",
 data : function() {
  return {
   author : 'vamous',
   url : 'http://blog.csdn.net/Dear_Mr/article/details/72614370'
  }
 }
});

<author></author>

new author().$mount('author');

var author = Vue.extend({
 template: "<p><a :href='url'>{{author}} & {{name}}</a></p>",
 data : function() {
  return {
   author : 'vamous',
   url : 'http://blog.csdn.net/Dear_Mr/article/details/72614370'
  }
 },
 props : ['name']
});

new author({propsData: {name : 'dear_mr'}}).$mount('#author');

<div id="author"></div>

 new author().$mount('author');

new author().$mount('#author');
new author().$mount('author');