Question

早安，我是vue.js的新手，我想输入foo这样的值，如果我再次尝试选择它时被选择为禁用的话。问题是当我选择第二个时，例如bar我可以返回并选择第一个为foo。enter image description here 这是我的代码。

Vue.component('v-select', VueSelect.VueSelect)

new Vue({
  el: '#app',
  data: {
  selected:"",
    options: [{
        id: 1,
        label: 'foo'
      },
      {
        id: 3,
        label: 'bar'
      },
      {
        id: 2,
        label: 'baz'
      },
    ],

  }
})

body {
  font-family: 'Source Sans Pro', 'Helvetica Neue', Arial, sans-serif;
}

h1 {
  font-size: 26px;
  font-weight: 600;
  color: #2c3e5099;
  text-rendering: optimizelegibility;
  -moz-osx-font-smoothing: grayscale;
  -moz-text-size-adjust: none;
}

#app {
  max-width: 30em;
  margin: 1em auto;
}

<script src="https://unpkg.com/babel-polyfill@latest/dist/polyfill.min.js"></script>
<script src="https://unpkg.com/bootstrap-vue@latest/dist/bootstrap-vue.js"></script>
<script src="https://unpkg.com/axios/dist/axios.min.js"></script>
<script src="https://unpkg.com/vue@latest"></script>
<!-- use the latest release -->
<script src="https://unpkg.com/vue-select@latest"></script>


<div id="app">
  <h1>Vue Select - Using v-model</h1>
  <v-select multiple v-model="selected" :options="options"></v-select>
</div>

Answer 1

我改变了 <script src="https://unpkg.com/vue-select@latest"></script> 到<script src="https://unpkg.com/vue-select@2.4.0/dist/vue-select.js"></script>。它有效。运行代码，使您知道我在说什么...

Vue.component('v-select', VueSelect.VueSelect)

new Vue({
  el: '#app',
  data: {
  selected:"",
    options: [{
        id: 1,
        label: 'foo'
      },
      {
        id: 3,
        label: 'bar'
      },
      {
        id: 2,
        label: 'baz'
      },
    ],

  }
})

body {
  font-family: 'Source Sans Pro', 'Helvetica Neue', Arial, sans-serif;
}

h1 {
  font-size: 26px;
  font-weight: 600;
  color: #2c3e5099;
  text-rendering: optimizelegibility;
  -moz-osx-font-smoothing: grayscale;
  -moz-text-size-adjust: none;
}

#app {
  max-width: 30em;
  margin: 1em auto;
}

<script src="https://unpkg.com/babel-polyfill@latest/dist/polyfill.min.js"></script>
<script src="https://unpkg.com/bootstrap-vue@latest/dist/bootstrap-vue.js"></script>
<script src="https://unpkg.com/axios/dist/axios.min.js"></script>
<script src="https://unpkg.com/vue@latest"></script>
<!-- use the latest release -->
<script src="https://unpkg.com/vue-select@2.4.0/dist/vue-select.js"></script>


<div id="app">
  <h1>Vue Select - Using v-model</h1>
  <v-select multiple v-model="selected" :options="options"></v-select>
</div>

Answer 2

这是默认行为，因为您在其中放置了多个属性，但不能两次选择foo选项。

如果在选择后坚持删除foo选项，则可以通过观察模型（“ selected”）并检查其值是否已更改来完成，然后从选项中删除foo。另外，如果删除foo，则可以获取模型的先前值（“选定”），将其进行比较，然后将已删除的值放在选项中。

https://vuejs.org/v2/guide/computed.html#Watchers

希望这会对您有所帮助：）

vue js mutli vselect不允许从下拉列表中进行重复选择

2 个答案: