v-model not working with <component> in Vue 3?
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P粉806834059 2023-08-29 20:16:20
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<p>为什么在下面的示例中 v-model 没有绑定到我的输入? <code><component></code> 有限制吗?</p> <pre class="brush:php;toolbar:false;"><script setup> import { ref } from 'vue' const config = ref({ headers: [ { field: 'id', label: 'Id', component: { type: 'input' } }, { field: 'name', label: 'Name', component: { type: 'input' } }, // more configs for radio buttons and other custom components ], data: [ { id: 1, name: 'foo' }, { id: 2, name: 'bar' } ] }) </script> <template> <table> <tr> <td v-for="header in config.headers"> <b>{{ header.label }}</b> </td> </tr> <tr v-for="item in config.data"> <td v-for="header in config.headers"> <component :is="header.component.type" v-model="item[header.field]" /> </td> </tr> </table> {{ config.data }} </template></pre></p>
P粉806834059
P粉806834059

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P粉081360775

Vue v-model Works great for native elements.

But it obviously doesn't work with

Your code generation

<input modelvalue="foo">

A very quick solution is to implement value binding directly.

:value="item[header.field]" @input="item[header.field] = $event.target.value"

But you will need to update the component accordingly to use value instead of modelValue.

renew

The workaround using v-model:value only works one way, the same as :value.

<component :is="header.component.type" v-model:value="item[header.field]" />

const { createApp, ref } = Vue

const config = ref({
  headers: [
    { field: 'id', label: 'Id', component: { type: 'input' } }, 
    { field: 'name', label: 'Name', component: { type: 'input' }  },
    // more configs for radio buttons and other custom components
  ],
  data: [
    { id: 1, name: 'foo' },
    { id: 2, name: 'bar' }
  ]
})

const App = {
  setup() {
    return { config, test: 1 }  
  }
}

const app = createApp(App)
app.mount('#app')
#app { line-height: 1.75; }
[v-cloak] { display: none; }
<div id="app">
<table>
    <tr>
      <td v-for="header in config.headers">
        <b>{{ header.label }}</b>
      </td>
    </tr>
    <tr v-for="item in config.data">
      <td v-for="header in config.headers">
        <component :is="header.component.type" :value="item[header.field]" @input="item[header.field] = $event.target.value" />
      </td>
    </tr>
  </table>
  {{ config.data }}
  <hr/>
  v-model test: <input v-model="test" />
</div>
<script src="https://unpkg.com/vue@3/dist/vue.global.prod.js"></script>
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