Generating Vuetify badges and icons with createElement in the render function: A step-by-step guide

Within my Vue application, I utilize a v-data-table. The column values are generated using a render function within a functional component as illustrated below:

render(createElement) {
    if (this.$props.format) {
      return this.$props.format(this.item, this.index, createElement);
    }
    return createElement('div', this.getText());
  },

The format function, found within an object in a separate file, allows the use of createElement to produce an HTML element and return it. Here's an example snippet from another section of the app:

format: (template, index, createElement) => {
    const captureType = template.captureType === 'passphrase' ? 'voice' : template.captureType;
    return createElement('div', captureType);
  },

Currently, I am attempting a more elaborate task - incorporating a Vuetify icon with a badge. Referencing the code snippet from the Vuetify documentation:

<v-badge left>
  <template v-slot:badge>
    <span>6</span>
  </template>
  <v-icon
    large
    color="grey lighten-1"
  >
    shopping_cart
  </v-icon>
</v-badge>

Initially, constructing the basic badge HTML was achievable

    format: (item, index, createElement) => {
      const propsObj = {
        attrs: {
          color: 'blue',
        },
        props: {
          overlap: true,
          left: true,
        },
        slots: {
          badge: 'dummy',
        },
      };
      return createElement('v-badge', propsObj, [createElement('v-icon', { attrs: { color: 'success', large: true } }, 'account_circle')]);
    },

This implementation almost reaches the desired outcome, displaying the icon wrapped within the badge element, yet without the badge content being visible:

<span class="v-badge v-badge--left v-badge--overlap">
  <i aria ....>account_circle></a>
</span>

The challenge lies in getting the display value to appear within the badge slot. What steps am I overlooking to achieve this?

Answer №1

Thanks to a friend's assistance, I managed to make it work flawlessly. Here is the finalized code snippet:

format: (item, index, createElement) => {
      const properties = {
        props: {
          overlap: true,
          left: true,
          color: 'success',
        },
      };
      const icon = createElement('v-icon', { props: { color: 'success', large: true } }, 'account_circle');
      const span = createElement('span', { slot: 'badge' }, '5');
      return createElement('v-badge', properties, [span, icon]);
    },

The approach involves breaking it into smaller segments that mirror the structure being aimed for. Essentially, it consists of a v-badge containing two components: the badge slot and the v-icon element. The necessary configuration options are passed to each child component, followed by passing the rendered elements to createElement for the parent v-badge.

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