How to change the value in the parent component in a vue2.0 child component?

The following Vue.js tutorial column will introduce to you the method of changing the value of the parent component through v-modal in the vue2.0 neutron component. It has certain reference value. Friends in need can refer to it. I hope it will be helpful to everyone.

In vue2.0, the child component changes the value in the parent component through v-modal

Parent component code:

<template lang="pug">
  p
    p this is father
    child(v-model="data")
</template>
<script>
  import child from "./childrenS.vue";
  export default{
    data(){
      return {
        data: [1, 2, 3]
      }
    },
    components: {
      child
    },
    watch: {
      data(n, o){
        console.log(n,o)
      }
    }
  }
</script>

Subcomponent code:

<template lang="pug">
  p this is child
</template>
<script>
  export default{
      created(){
          this.$emit("input",[4,5,6])
      }
  }
</script>

The effect is as follows:

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