SOURCE

var obj = {
  foo: 'bar',
  message: "hello world." + " sss"
}

var app = new Vue({
  el: '#app',
  data: obj,
	created: function () {
    // `this` 指向 vm 实例
    console.log('foo is: ' + this.foo)
  },
	methods: {
    reverseMessage: function () {
      this.message = this.message.split('').reverse().join('')
    }
  }
})

<div id="app">
	<div>{{ message + ' suffix'}}</div>
	<span :title="message">
    鼠标悬停几秒钟查看此处动态绑定的提示信息！
  </span>
	<button v-on:click="reverseMessage">反转消息</button>
</div>