How can you customize all elements in a table header?

Question

Looking at the examples on this page, what is the way to apply toUpper to all header items? It looks too clumsy having to do it one-by-one (i.e. header.calories, header.fat...) and I can't figure out how a v-for can wrap around the template/v-slot element. Is the only way to use a 'div' and flex it horizontally?

 <template>
   <v-data-table
     :headers="headers"
     :items="desserts"
     class="elevation-1"
   >
     <template v-slot:header.name="{ header }">
       {{ header.text.toUpperCase() }}
     </template>
   </v-data-table>
 </template>

 <script>
   export default {
     data: () => ({
       headers: [
         {
           text: 'Dessert (100g serving)',
           align: 'start',
           value: 'name',
         },
         { text: 'Calories', value: 'calories' },
         { text: 'Fat (g)', value: 'fat' },
         { text: 'Carbs (g)', value: 'carbs' },
         { text: 'Protein (g)', value: 'protein' },
         { text: 'Iron (%)', value: 'iron' },
       ],
       desserts: [
         {
           name: 'Frozen Yogurt',
           calories: 159,
           fat: 6.0,
           carbs: 24,
           protein: 4.0,
           iron: '1%',
         },
         ....// rest of it
       ],
     }),
   }
 </script>

Answer 1

It is possible to loop the headers to make all capitalize

here is the working codepen: https://codepen.io/chansv/pen/gOaRWQb?editors=1010

<div id="app">
  <v-app id="inspire">
    <v-data-table
      :headers="headers"
      :items="desserts"
      class="elevation-1"
      hide-default-header
    >
      <template v-slot:header="{ props }">
        <th v-for="head in props.headers">{{ head.text.toUpperCase() }}
      </template>
    </v-data-table>
  </v-app>
</div>


new Vue({
  el: '#app',
  vuetify: new Vuetify(),
  data: () => ({
    headers: [
      {
        text: 'Dessert (100g serving)',
        align: 'start',
        value: 'name',
      },
      { text: 'Calories', value: 'calories' },
      { text: 'Fat (g)', value: 'fat' },
      { text: 'Carbs (g)', value: 'carbs' },
      { text: 'Protein (g)', value: 'protein' },
      { text: 'Iron (%)', value: 'iron' },
    ],
    desserts: [
      {
        name: 'Frozen Yogurt',
        calories: 159,
        fat: 6.0,
        carbs: 24,
        protein: 4.0,
        iron: '1%',
      },
      {
        name: 'Ice cream sandwich',
        calories: 237,
        fat: 9.0,
        carbs: 37,
        protein: 4.3,
        iron: '1%',
      },
      {
        name: 'Eclair',
        calories: 262,
        fat: 16.0,
        carbs: 23,
        protein: 6.0,
        iron: '7%',
      },
      {
        name: 'Cupcake',
        calories: 305,
        fat: 3.7,
        carbs: 67,
        protein: 4.3,
        iron: '8%',
      },
      {
        name: 'Gingerbread',
        calories: 356,
        fat: 16.0,
        carbs: 49,
        protein: 3.9,
        iron: '16%',
      },
      {
        name: 'Jelly bean',
        calories: 375,
        fat: 0.0,
        carbs: 94,
        protein: 0.0,
        iron: '0%',
      },
      {
        name: 'Lollipop',
        calories: 392,
        fat: 0.2,
        carbs: 98,
        protein: 0,
        iron: '2%',
      },
      {
        name: 'Honeycomb',
        calories: 408,
        fat: 3.2,
        carbs: 87,
        protein: 6.5,
        iron: '45%',
      },
      {
        name: 'Donut',
        calories: 452,
        fat: 25.0,
        carbs: 51,
        protein: 4.9,
        iron: '22%',
      },
      {
        name: 'KitKat',
        calories: 518,
        fat: 26.0,
        carbs: 65,
        protein: 7,
        iron: '6%',
      },
    ],
  }),
})