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Drilldown with label in Vue TreeMap component

Add label template with drill down

Yon can add a label template as

element to the tree map control when using the label template. To add a label template to the tree map control, you have to hide another labels by setting the showLabels property to false in leafItemSettings to show only the label template.

To add label template to tree map drilldown, follow the given steps:

Step 1:

Create a tree map control and enable the drill-down option.

<template>
      <div class='control_wrapper'>
         <ejs-treemap id='container' :dataSource="dataSource" weightValuePath="Sales" enableDrillDown="true" :palette="palette"
         :leafItemSettings='leafItemSettings' :levels='levels' >
         </ejs-treemap>
      </div>
</template>

<script>
import Vue from 'vue';
import { TreeMapPlugin } from '@syncfusion/ej2-vue-treemap';

Vue.use(TreeMapPlugin);
export default {
   data () {
    return {
      dataSource:  [
            { Continent: "China", Company: "Volkswagen", Sales: 3005994 },
            { Continent: "China", Company: "General Motors", Sales: 1230044 },
            { Continent: "China", Company: "Honda", Sales: 1197023 },
            { Continent: "United States", Company: "General Motors", Sales: 3042775 },
            { Continent: "United States", Company: "Ford", Sales: 2599193 },
            { Continent: "United States", Company: "Toyota", Sales: 2449587 },
            { Continent: "Japan", Company: "Toyota", Sales: 1527977 },
            { Continent: "Japan", Company: "Honda", Sales: 706982 },
            { Continent: "Japan", Company: "Suzuki", Sales: 623041 },
            { Continent: "Germany", Company: "Volkswagen", Sales: 655977 },
            { Continent: "Germany", Company: "Mercedes", Sales: 310845 },
            { Continent: "Germany", Company: "BMW", Sales: 261931 },
            { Continent: "United Kingdom", Company: "Ford ", Sales: 319442 },
            { Continent: "United Kingdom", Company: "Vauxhall", Sales: 251146 },
            { Continent: "United Kingdom", Company: "Volkswagen", Sales: 206994 }
        ],
        palette: ['white'],
        levels: [
            {
                groupPath: 'Continent', border: { color: 'black', width: 0.5 },
            },
            {
              groupPath: 'Company', border: { color: 'black', width: 0.5 },
            }
        ],
        leafItemSettings: {
          showLabels: false,
          labelTemplate: '<div style="background-color: red">{{:Company}}</div>',
          templatePosition: 'Center'
        }
    }
  }
}
}
</script>

Step 2:

Add the label template in the leafItemSettings options, and then set the showLabels property to false to hide another labels and show only label template.

Source
Preview
app.vue
<template>
      <div class='control_wrapper'>
         <ejs-treemap id='container' :dataSource="dataSource" weightValuePath="Sales" enableDrillDown="true" :palette="palette"
         :leafItemSettings='leafItemSettings' :levels='levels' :drillStart='drillStart' >
         </ejs-treemap>
      </div>
</template>

<script>
import Vue from 'vue';
import { TreeMapPlugin } from '@syncfusion/ej2-vue-treemap';

Vue.use(TreeMapPlugin);
export default {
   data () {
    return {
      dataSource:  [
            { Continent: "China", Company: "Volkswagen", Sales: 3005994 },
            { Continent: "China", Company: "General Motors", Sales: 1230044 },
            { Continent: "China", Company: "Honda", Sales: 1197023 },
            { Continent: "United States", Company: "General Motors", Sales: 3042775 },
            { Continent: "United States", Company: "Ford", Sales: 2599193 },
            { Continent: "United States", Company: "Toyota", Sales: 2449587 },
            { Continent: "Japan", Company: "Toyota", Sales: 1527977 },
            { Continent: "Japan", Company: "Honda", Sales: 706982 },
            { Continent: "Japan", Company: "Suzuki", Sales: 623041 },
            { Continent: "Germany", Company: "Volkswagen", Sales: 655977 },
            { Continent: "Germany", Company: "Mercedes", Sales: 310845 },
            { Continent: "Germany", Company: "BMW", Sales: 261931 },
            { Continent: "United Kingdom", Company: "Ford ", Sales: 319442 },
            { Continent: "United Kingdom", Company: "Vauxhall", Sales: 251146 },
            { Continent: "United Kingdom", Company: "Volkswagen", Sales: 206994 }
        ],
        palette: ['white'],
        levels: [
            {
                groupPath: 'Continent', border: { color: 'black', width: 0.5 },
            },
            {
              groupPath: 'Company', border: { color: 'black', width: 0.5 },
            }
        ],
        leafItemSettings: {
          showLabels: false,
          labelTemplate: '<div style="background-color: red">{{:Company}}</div>',
          templatePosition: 'Center'
        }
    }
  },
  methods:{
    drillStart:function(args){
        let labelElementGroup = document.getElementById('container_Label_Template_Group');
        labelElementGroup.remove();
    }
}
}
</script>