[SOLVED] How to return boolean and not string when using select?

How to return boolean and not string when using select?

I have this:-

            <div class="form-group">
                <label for="">Allow Multiple</label>
                <select class="form-control" v-model="allowMultiple">
                    <option value=true>Yes</option>
                    <option value=false>No</option>
                </select>
            </div>

I set allowMultiple=true when I initialize it, but when I select No then allowMultiple='false' So its no longer a Boolean but a String? How to get it to be Boolean?

Solution

In HTML, if you set attribute value in a tag, the value will be default type--string.So you can use vue v-model in combination with :value to bind it to other type value, for example, Boolean, Number and etc. Following code is working, the result is what you want

new Vue({
  el:'#app',
  data: {
    allowMultiple: false
  },
  methods: {
    print: function () {
      alert(this.allowMultiple);
    }
  }
})

<div class="form-group" id='app'>
   <label for="">Allow Multiple</label>
   <select class="form-control" v-model="allowMultiple" @change='print'>
        <option :value='true'>Yes</option>
        <option :value='false'>No</option>
   </select>
<div>
    Type: {{ typeof allowMultiple }},
    Value: {{ allowMultiple }} 
</div>

</div>
<script src="https://unpkg.com/vue@2.4.2/dist/vue.min.js"></script>