动态更改vuejs 2中的选择输入选项

Question

如何动态更改选择下拉列表v模型中的选项？

我有2个选择输入,一个应该根据其他输入改变.

例如,如果我选择"水果",则选择显示水果,如果我选择"蔬菜"则显示蔬菜.

Answer 1

我不使用Vuejs,但在查看文档之后:

var TypesArr = {
                Fruit: [{ text: 'Apple', value: 'Apple' }, { text: 'Orange', value: 'Orange' }, { text: 'Mango', value: 'Mango' }],
                Meat:  [{ text: 'Steak', value: 'Steak' }, { text: 'Pork', value: 'Pork' }]
               }


var selectTwo = new Vue({
    el: '#select2',
    data: {
           selected: TypesArr['Fruit'][0],
           options: TypesArr['Fruit']
       },
       methods: {
         update: function (value)
         {
             this.options = TypesArr[value]
         }
       }
})


new Vue({
    el: '#select1',
    data: {
           selected: 'Fruit',
           options: [ { text: 'Fruit', value: 'Fruit' }, { text: 'Meat', value: 'Meat' } ]
       },
       methods: {
         onChange: function (event)
         {
             selectTwo.update(event.srcElement.value)
         }
       }
})

<script src="https://unpkg.com/vue/dist/vue.js"></script>

<select v-on:change="onChange" id="select1">
    <option v-for="option in options" v-bind:value="option.value">
    {{ option.text }}
    </option>
</select>

<select id="select2">
    <option v-for="option in options" v-bind:value="option.value">
    {{ option.text }}
    </option>
</select>