TranslateForm.vue
<template>
 <div>
 <!--加上页面修饰符，提交时就不回再重载页面-->
 <form v-on:submit.prevent="formSubmit">
  <input type="text" v-model="text" placeholder="输入需要翻译的内容"/>
  <select v-model="to">
  <option value ="en">英文</option>
  <option value ="ko">韩文</option>
  <option value ="fr">法文</option>
  <option value ="ru">俄文</option>
  </select>
  <input type="submit" value="翻译"/>
 </form>
 </div>
</template>
<script>
export default {
 name: 'TranslateForm',
 data: function () {
 return {
  text: '',
  to: 'en'
 }
 },
 methods: {
 formSubmit: function () {
  this.$emit('formSubmit', this.text, this.to)
 }
 }
}
</script>
<style></style>

<template>
 <div id="app">
 <h2>简单翻译</h2><span>简单/易用/便捷</span>
 <TranslateForm v-on:formSubmit="textTranslate"></TranslateForm>
 <TranslateText :translated-text="translatedText"></TranslateText>
 </div>
</template>
<script>
import TranslateForm from './components/TranslateForm.vue'
import TranslateText from './components/TranslateText.vue'
import md5 from 'blueimp-md5'
import $ from 'jquery'

export default {
 name: 'App',
 data: function () {
 return {
  translatedText: '2',
  appKey: '47bb6e424790df89',
  key: 'NH2VxBadIlKlT2b2qjxaSu221dSC78Ew',
  salt: (new Date()).getTime(),
  from: '',
  to: 'en'
 }
 },
 components: {
 TranslateForm, TranslateText
 },
 methods: {
 textTranslate: function (text, to) {
  let vm = this
  $.ajax({
  url: 'http://openapi.youdao.com/api',
  type: 'post',
  dataType: 'jsonp',
  data: {
   q: text,
   appKey: this.appKey,
   salt: this.salt,
   from: this.from,
   to: to,
   sign: md5(this.appKey + text + this.salt + this.key)
  },
  success: function (data) {
   vm.$set(vm.$data, 'translatedText', data.translation[0])
  }
  })
 }
 }
}
</script>
<style>
 #app {
 font-family: 'Avenir', Helvetica, Arial, sans-serif;
 -webkit-font-smoothing: antialiased;
 -moz-osx-font-smoothing: grayscale;
 text-align: center;
 color: #2c3e50;
 margin-top: 60px;
 }
</style>

 success: function (data) {
   this.translatedText = data.translation[0]
   console.log(this.translatedText)
  }

success: function (data) {
   this.$set(this.$data, 'translatedText', data.translation[0])
  }

TranslateText.vue
<template>
 <div id="TranslateText">
 <p>{{translatedText}}</p>
 </div>
</template>
<script>
export default {
 name: 'TranslateText',
 props: [
 'translatedText'
 ]
}
</script>
<style></style>