Vuetify's v-autocomplete component resets the v-model value to null when cleared

Question

In the code below I am using a v-autocomplete component and a variable select where the selected value is stored. The watch logs the value and type of select. The problem I'm facing is that when the text typed in the v-autocomplete is cleared, select defaults to null instead of an empty string. Is there any way to revert select to an empty string instead of a null object?

<div id="app">
  <v-app id="inspire">
    <v-card>
      <v-container fluid>
        <v-row
          align="center"
        >
          <v-col cols="12">
            <v-autocomplete
              v-model="select"
              :items="items"
              dense
              filled
              label="Filled"
              clearable
            ></v-autocomplete>
          </v-col>
        </v-row>
      </v-container>
    </v-card>
  </v-app>
</div>

new Vue({
  el: '#app',
  vuetify: new Vuetify(),
  data: () => ({
    items: ['foo', 'bar', 'fizz', 'buzz'],
    select: "",
  }),
  watch:{
    value:function(value){
      console.log(this.select) // select value
      console.log(typeof(this.value)); // select variable type
    }
  }
})

Answer 1

v-model='select' is a shorthand for :value="select" and @input="select = $event". Thus, if you want to customize the behaviour of emitted @input event, you can write it in expanded form.

In below snippet, when the input value changes, you assign it to select if it is not null, or assign an empty string otherwise.

new Vue({
  el: '#app',
  vuetify: new Vuetify(),
  data: () => ({
    items: ['foo', 'bar', 'fizz', 'buzz'],
    select: "",
  }),
  watch:{
    select:function(value){
      console.log(value) // select value
      console.log(typeof(value)); // select variable type
    }
  }
})

<link href="https://fonts.googleapis.com/css?family=Roboto:100,300,400,500,700,900" rel="stylesheet">
<link href="https://cdn.jsdelivr.net/npm/@mdi/font@4.x/css/materialdesignicons.min.css" rel="stylesheet">
<link href="https://cdn.jsdelivr.net/npm/vuetify@2.x/dist/vuetify.min.css" rel="stylesheet">

<script src="https://cdn.jsdelivr.net/npm/vue@2.x/dist/vue.js"></script>
<script src="https://cdn.jsdelivr.net/npm/vuetify@2.x/dist/vuetify.js"></script>

<div id="app">
  <v-app id="inspire">
    <v-card>
      <v-container fluid>
        <v-row
          align="center"
        >
          <v-col cols="12">
            <v-autocomplete
              :value="select"
              @input="select = $event || ''"
              :items="items"
              dense
              filled
              label="Filled"
              clearable
            ></v-autocomplete>
          </v-col>
        </v-row>
      </v-container>
    </v-card>
  </v-app>
</div>