vue how to access v-model from child component

问题:

my child component is like this

<editor v-model="edit_thread.body"></editor>

and then I access the component from inside like this

<template>
    <div>
        <input :value="this.value">
    </div>
</template>

<script>
    export default {
        data() {
            return {
                value: this.edit_thread.body
            }
        }
    }
</script>

not working, I miss something?

回答1:

To use v-model on custom components, the component needs to:

• have a prop (not a data property) named value:

  <template>
    <div>
      <input :value="value">
    </div>
  </template>
  
  <script>
  export default {
    props: ['value']
  }
  </script>
  

• and emit an input event with new values:

  <template>
    <div>
      <input @input="$emit('input', $event.target.value)">
    </div>
  </template>
  

demo