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HTML

              
                <div class="container" id="app">

  <div class="row">
    <div class="col-xs-12">
      <span class="label label-primary">v-model</span> Basic Usage Handlers     
    </div>
    <div class="col-xs-12 form-inline">
      <label for="input1">Write something down:</label>
      <input id="input1" class="form-control" type="text" v-model="textInput1Content">
      &nbsp;<span>And the reverse is: {{ reverseTextInput1Content }}</span>
    </div>
    <div class="col-xs-12">
      Write some code below:
    </div>
    <div class="col-xs-6">
      <textarea class="col-xs-12 form-control" v-model="textareaContent"></textarea>
    </div>
    <div class="col-xs-6">
      <pre>{{ textareaContent }}</pre>
    </div>
    <div class="col-xs-12">
      <b>How to spell "🐕" in English ?</b>
    </div>
    <div class="col-xs-12">
      <input type="checkbox" id="letterO" value="O" v-model="dogLetters">
      <label for="letterO">O</label>
      <input type="checkbox" id="letterG" value="G" v-model="dogLetters">
      <label for="letterG">G</label>
      <input type="checkbox" id="letterD" value="D" v-model="dogLetters">
      <label for="letterD">D</label>
    </div>
    <div class="col-xs-12">{{ checkDogLetters() }}</div>
    <div class="col-xs-12">
      <b>Which fruit do you like ?</b>
    </div>
    <div class="col-xs-12">
      <select class="form-control" v-model="selectedFruits" multiple>
        <option value="Apple">🍎</option>
        <option value="Pear">🍐</option>
        <option value="Banana">🍌</option>
      </select>
    </div>
    <div class="col-xs-12">You like: {{ selectedFruits }}</div>
  </div>
  
  <div class="row">
    <div class="col-xs-12">
      <span class="label label-primary">v-model</span> Value Bindings     
    </div>
    
    <div class="col-xs-12">
      <label>Do you like my code ?</label>
      <input type="checkbox" v-model="toggleLike" v-bind:true-value="like" v-bind:false-value="dislike"> {{ toggleLike }}
    </div>
    
  </div>
  
  <div class="row">
    <div class="col-xs-12">
      <span class="label label-primary">v-model</span> Modifiers   
    </div>
    
    <div class="col-xs-12 form-inline">
      <label for="textInput2">You can't change the message until you press on enter:</label>&nbsp;
      <input class="form-control" id="textInput2" type="text" v-model.lazy="msg" >
      {{ msg }}
    </div>
    
    <div class="col-xs-12 form-inline">
      <label for="workdays">How many working days you have in a week?</label>
      <input class="form-control" id="workdays" v-model.number="workdays" type="number">
      {{ workdays }} day(s) (type: {{ typeOfWorkdays }})
    </div>
    
  </div>
  
  
</div>

              
            
!

CSS

              
                .container {
  margin-top:20px;
  font-size: 20px;
  font-family: 'Source Sans Pro', 'Helvetica Neue', Arial, sans-serif;
  
  .row {
    margin-bottom: 10px;
    
    .col-xs-12 {
      margin-bottom: 10px;
    }
  }  
  
}


              
            
!

JS

              
                let app = new Vue({
  el: '#app',
  data: {
    textInput1Content: 'Whatever...',
    textareaContent: '',
    dogLetters: [],
    selectedFruits: [],
    toggleLike: '❤️',
    like: '❤️',
    dislike: '💔',
    msg: '',
    workdays: 0,
  },
  methods: {
    checkDogLetters: function() {
      if (0 === this.dogLetters.length) {
        return 'You need to choose the checkbox above.'; 
      } else if (3 > this.dogLetters.length) {
        return 'Not empty letters.'         
      } else {
        if (_.isEqual(this.dogLetters, ['D', 'O', 'G'])) {
          return 'Good 🐶'
        } else if (_.isEqual(this.dogLetters, ['G', 'O', 'D'])) {
          return "🙅 No, that's 🙏🙏🙏"
        } else {
          return "🙅 No, I don't know what are you talking about."         
        }
      }
    }
  },
  computed: {
    reverseTextInput1Content: function() {
      return this.textInput1Content.split('').reverse().join('')
    },
    typeOfWorkdays: function() {
      return typeof this.workdays
    }
  }
})

              
            
!
999px

Console