vue how to access v-model from child component

Question

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?

Answer 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