How to dynamically format date on item-text inside v-autocomplete (Vuetify)

Question

I have this v-autocomplete which receives an array of items to display from GrowthTasks.edges

<v-autocomplete label="Start Week" 
:items="GrowthTasks.edges" item-text="node.growthStartDate" item-value="node.growthStartDate" dense></v-autocomplete>

The item-text receives the text from there by acessing node.growthStartDate, which is a date format like : "2020-05-06".

Now I want to turn it into a format like "2020-W19" , which I know is possible using moment("YYYY-[W]WW") but I dont know how to tell this to item-text.

Basically, I want the result on the item-text to be the same as if I was using :

{{ node.growthStartDate | moment("YYYY-[W]WW") }}

which works.

Any idea on how can do it ?

Answer 1

You can create computed property and return formated dates:

new Vue({
  el: '#app',
  vuetify: new Vuetify(),
  data() {
    return {
      GrowthTasks: {edges: [{growthStartDate: "2020-05-06"}, {growthStartDate: "2020-06-07"}]}
    }
  },
  computed: {
    items() {
      return this.GrowthTasks.edges.map(obj => ({ ...obj, growthStartDate: moment(obj.growthStartDate).format("YYYY-[W]WW") }));
    }
  }
})

<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/[email protected]/css/materialdesignicons.min.css" rel="stylesheet">
<link href="https://cdn.jsdelivr.net/npm/[email protected]/dist/vuetify.min.css" rel="stylesheet">
<script src="https://cdnjs.cloudflare.com/ajax/libs/moment.js/2.29.1/moment.min.js" integrity="sha512-qTXRIMyZIFb8iQcfjXWCO8+M5Tbc38Qi5WzdPOYZHIlZpzBHG3L3by84BBBOiRGiEb7KKtAOAs5qYdUiZiQNNQ==" crossorigin="anonymous" referrerpolicy="no-referrer"></script>
<div id="app">
  <v-app>
    <v-main>
      <v-container>
        <v-autocomplete label="Start Week" 
:items="items" item-text="growthStartDate" item-value="growthStartDate" dense></v-autocomplete>
      </v-container>
    </v-main>
  </v-app>
</div>
<script src="https://cdn.jsdelivr.net/npm/[email protected]/dist/vue.js"></script>
<script src="https://cdn.jsdelivr.net/npm/[email protected]/dist/vuetify.js"></script>

Answer 2

You can use filters or methods using v-slot:item, If you want to pass a date to the moment.js, I suggest to use Filters, you can register filters globally and can use them anywhere in your application.

new Vue({
  el: '#app',
  vuetify: new Vuetify(),
  data() {
    return {
      GrowthTasks: {edges: [{growthStartDate: "2020-05-06"}, {growthStartDate: "2020-06-07"}]}
    }
  },
  filters: {
    myDateFilter(date, desireFormat) {
      return moment(date).format(desireFormat);
    }
}
})

<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/[email protected]/css/materialdesignicons.min.css" rel="stylesheet">
<link href="https://cdn.jsdelivr.net/npm/[email protected]/dist/vuetify.min.css" rel="stylesheet">
<script src="https://cdnjs.cloudflare.com/ajax/libs/moment.js/2.29.1/moment.min.js" integrity="sha512-qTXRIMyZIFb8iQcfjXWCO8+M5Tbc38Qi5WzdPOYZHIlZpzBHG3L3by84BBBOiRGiEb7KKtAOAs5qYdUiZiQNNQ==" crossorigin="anonymous" referrerpolicy="no-referrer"></script>
<div id="app">
  <v-app>
    <v-main>
      <v-container>
      
        <v-autocomplete label="Start Week" 
:items="GrowthTasks.edges" item-text="growthStartDate" item-value="growthStartDate" dense>
      <template v-slot:item="data">
       {{ data.item.growthStartDate |  myDateFilter('YYYY-[W]WW') }}
      </template>
</v-autocomplete>
      
      </v-container>
    </v-main>
  </v-app>
</div>
<script src="https://cdn.jsdelivr.net/npm/[email protected]/dist/vue.js"></script>
<script src="https://cdn.jsdelivr.net/npm/[email protected]/dist/vuetify.js"></script>